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I'm trying to mount dd images of the partitions in /dev/block on my Linux box, but mount can't figure out the filesystem types used. I found some of them by running the "mount" command with no parameters on on the phone, but there are still a bunch of partitions that I can't identify (list below). I've tried ext4, vfat, sysfs, tmpfs, debugfs, and others with no luck. What else might they be?
Strangely, when I try to mount with sysfs, tmpfs, and debugfs it shows me files that aren't actually on the partition.
Anyway, the non-bolded ones below are the ones I'm still trying to mount:
mmcblk0p1
mmcblk0p2
mmcblk0p3
mmcblk0p4
mmcblk0p5
mmcblk0p6
mmcblk0p7
mmcblk0p8
mmcblk0p9
mmcblk0p10
mmcblk0p11
mmcblk0p12
mmcblk0p13
mmcblk0p14
mmcblk0p15
mmcblk0p16
mmcblk0p17
mmcblk0p18
mmcblk0p19
mmcblk0p20
mmcblk0p21
mmcblk0p22
mmcblk0p23
mmcblk0p24
mmcblk0p25
mmcblk0p26
mmcblk0p27
mmcblk0p28
mmcblk0p29
mmcblk0p30
mmcblk0p31
mmcblk0p32
mmcblk0p33
mmcblk0p34
mmcblk0p35
mmcblk0p36
mmcblk0p37
mmcblk0p38
Any insight is appreciated! I've been searching and guessing/checking for hours!
I think this thread is obsolete now, please go to
[DEV][REF] El Grande Partition Table Reference
instead, which contains more facts
Hi,
I want to create a list of Android partitions, to collect information for different purposes.
My current cause of investigation is about repartitioning emmc bricked Samsung phones, but the guide could collect all kinds of information (in short form, eventually with links to deeper investigations).
I want to format this as a living post, with new information added where appropriate (I assume the wiki would fit better, but I don't see a section to put this, also I don't know if fitting to Samsung only or Android in general until enough information is collected).
So let's start:
So let's visit partitions one by one:
GANG
* has zero size in PIT, seems to be hidden in the following unused area
* no real partition, but included in PITs
BOOT
* has zero size in PIT, seems to be hidden in the following unused area
EFS
* mounted on /efs
* contains many personalized information
* IMEI
* bluetooth MAC etc.
* restoration only possible with JTAG
* should be backuped!!!
SBL1, SBL2
* BL = boot loader
* S = Secondary?
* why do we have SBL1 *and* SBL2?
PARAM
* currently I don't know anything about this
KERNEL
* contains kernel (obviously)
* also contains recovery on some/many Samsung Galaxy phones (e.g. N7000)
* read only
RECOVERY
* seems to be unused on Samsung Galaxy N7000, KERNEL comes with recovery integrated
* read only
CACHE
* mounted on /cache
* temporary data
* can be cleared without loosing any important data
MODEM
* modem software for cell phone
* can be flashed from stock file
* read only?
FACTORYFS, system
* mounted on /system
* main OS code
* system apps
* read only
DATAFS, data
* mounted on /data
* user apps
* read/write
UMS, userdata
* mounted on /sdcard, sometimes /emmc
* sometimes called internal sd
HIDDEN, PRELOAD
* mounted on /preload
* purpose?
FOTA
* F = Factory?
* OTA = Over The Air
* may be used for Updates by stock ROM
Here are also some general thoughts about repartitioning these partitions to be mixed into the list later if it fits (just as a reminder):
* if you have a brick in a partition you cannot create a backup to restore afterwards
* partitions which have stock contents (not personalized) will be easy
* EFS cannot be restored without having a backup,
it contains nearly all really personalized information, with the most important data being the IMEI, which is unique to your phone. You find it printed on a sticker on your phone, but currently no one seems to be able to patch it into a generic copy of the EFS.
* some partitions will be needed to boot into recovery and/or download mode
I would assume BOOT, SBL1 and/or SBL2 are involved.
Some may be needed to boot into both recovery *and* download mode.
Some may be needed only for one of them.
If a PIT would move these, you cannot enter download and/or recovery again, thus your phone is nearly dead and only recoverable by JTAG.
* what about PARAM?
First of all, great initiative!
I have a SE Xperia Arc and the file structure differs a lot from your Samsung device.
Here is a list of the partitions, their current mount point(s) and filetype. I have put some useful references to the list. This will probably provide more accurate descriptions, rather than giving a brief explanation on each file system.
rootfs / rootfs [1]
tmpfs /dev tmpfs [2]
tmpfs /mnt/asec tmpfs
tmpfs /mnt/obb tmpfs
tmpfs /mnt/sdcard/.android_secure tmpfs
devpts /dev/pts devpts [3]
proc /proc proc [4]
sysfs /sys sysfs [5]
/dev/block/mtdblock0 /system yaffs2 [6][8]
/dev/block/mtdblock1 /cache yaffs2
/dev/block/mtdblock2 /system/vendor yaffs2
/dev/block/mtdblock3 /data yaffs2
/dev/block/vold/179:1 /mnt/sdcard vfat [7][9]
/dev/block/vold/179:1 /mnt/secure/asec vfat
References:
[1] rootfs
[2] tmpfs
[3] devpts
[4] proc
[5] sysfs
[6] yaffs2
[7] vfat Virtual FAT
[8] mtd
[9] vold
I also found two more links that could be useful in this thread.
Atrix HD Partition Research, How to use QUALCOMM eMMC MBR/EBR Partitioning plugin
hg42 said:
FOTA
* F = Factory?
* OTA = Over The Air
* may be used for Updates by stock ROM
Click to expand...
Click to collapse
F = firmware, http://en.wikipedia.org/wiki/FOTA_%28technology%29
Thanks, nice contribution.
Can you provide a dump of 'parted print' for your device?
Unfortunately, the parted partition command is not included among the Xperia Arc's stock binaries, nor in BusyBox 1.20.2 (but hopefully in the future).
Do you have a pre-compiled binary to share?
Here is what I can contribute to your collection for now:
Code:
[email protected]:/ # busybox fdisk -l
Linux localhost 2.6.32.9-perf #1 PREEMPT Wed Jul 4 12:32:24 2012 armv7l GNU/Linux
[email protected]:/ # busybox fdisk -l
Note: sector size is 4096 (not 512)
Disk [URL="http://shmilyxbq-compcache.googlecode.com/hg/README"]/dev/zram0[/URL]: 62 MB, 62914560 bytes
255 heads, 63 sectors/track, 0 cylinders
Units = cylinders of 16065 * 4096 = 65802240 bytes
Disk /dev/zram0 doesn't contain a valid partition table
k02a said:
Unfortunately, the parted partition command is not included among the Xperia Arc's stock binaries, nor in BusyBox 1.20.2 (but hopefully in the future).
Do you have a pre-compiled binary to share?
Click to expand...
Click to collapse
you can try the attachment to this post
but I'm not sure if an exynos processor (Samsung Galaxy Note N7000) has the same executable format than your phone, at least both have armv7l.
hg42 said:
but I'm not sure if an exynos processor (Samsung Galaxy Note N7000) has the same executable format than your phone, at least both have armv7l.
Click to expand...
Click to collapse
The parted binary worked fine, but the file system on the LT15i needs to be explored some day.
Code:
[email protected]:/ # parted
parted
GNU Parted 1.8.8.1.179-aef3
Using /dev/zram0
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print
print
print
Error: /dev/zram0: unrecognised disk label
(parted)
k02a said:
The parted binary worked fine, but the file system on the LT15i needs to be explored some day.
Error: /dev/zram0: unrecognised disk label
Click to expand...
Click to collapse
can you post the output of " adb shell ls /dev/block/ "?
Sure.
Code:
[email protected]:/ $ ls -la /dev/block
ls -la /dev/block
brw------- root root 254, 0 1980-01-06 02:02 dm-0
brw------- root root 254, 8 1980-01-06 02:02 dm-8
brw------- root root 7, 0 1980-01-06 02:01 loop0
brw------- root root 7, 1 1980-01-06 02:01 loop1
brw-rw---- root root 7, 10 1980-01-06 02:02 loop10
brw-rw---- root root 7, 11 1980-01-06 02:02 loop11
brw-rw---- root root 7, 12 1980-01-06 02:02 loop12
brw------- root root 7, 2 1980-01-06 02:01 loop2
brw------- root root 7, 3 1980-01-06 02:01 loop3
brw------- root root 7, 4 1980-01-06 02:01 loop4
brw------- root root 7, 5 1980-01-06 02:01 loop5
brw------- root root 7, 6 1980-01-06 02:01 loop6
brw------- root root 7, 7 1980-01-06 02:01 loop7
brw-rw---- root root 7, 8 1980-01-06 02:02 loop8
brw-rw---- root root 7, 9 1980-01-06 02:02 loop9
brw------- root root 179, 0 1980-01-06 02:01 mmcblk0
brw------- root root 179, 1 1980-01-06 02:01 mmcblk0p1
brw------- root root 31, 0 1980-01-06 02:01 mtdblock0
brw------- root root 31, 1 1980-01-06 02:01 mtdblock1
brw------- root root 31, 2 1980-01-06 02:01 mtdblock2
brw------- root root 31, 3 1980-01-06 02:01 mtdblock3
drwxr-xr-x root root 1980-01-06 02:01 platform
brw------- root root 1, 0 1980-01-06 02:01 ram0
brw------- root root 1, 1 1980-01-06 02:01 ram1
brw------- root root 1, 2 1980-01-06 02:01 ram2
brw------- root root 1, 3 1980-01-06 02:01 ram3
brw------- root root 1, 4 1980-01-06 02:01 ram4
brw------- root root 1, 5 1980-01-06 02:01 ram5
brw------- root root 1, 6 1980-01-06 02:01 ram6
brw------- root root 1, 7 1980-01-06 02:01 ram7
drwxr-xr-x root root 1980-01-06 02:01 vold
brw------- root root 253, 0 1980-01-06 02:01 zram0
The listing you were asking for is not as interesting as the following:
Code:
[email protected]:/ # ls -la /sys/devices/virtual/block/zram0
ls -la /sys/devices/virtual/block/zram0
-r--r--r-- root root 4096 2012-09-06 00:18 alignment_offset
lrwxrwxrwx root root 2012-09-06 00:18 bdi -> ../../bdi/253:0
-r--r--r-- root root 4096 2012-09-06 00:18 capability
-r--r--r-- root root 4096 2012-09-06 00:18 compr_data_size
-r--r--r-- root root 4096 2012-09-06 00:18 dev
-rw-r--r-- root root 4096 1980-01-06 02:01 disksize
-r--r--r-- root root 4096 2012-09-06 00:18 ext_range
drwxr-xr-x root root 2012-09-06 00:18 holders
-r--r--r-- root root 4096 2012-09-06 00:18 inflight
-r--r--r-- root root 4096 2012-09-06 00:18 initstate
-r--r--r-- root root 4096 2012-09-06 00:18 invalid_io
-r--r--r-- root root 4096 2012-09-06 00:18 mem_used_total
-r--r--r-- root root 4096 2012-09-06 00:18 notify_free
-r--r--r-- root root 4096 2012-09-06 00:18 num_reads
-r--r--r-- root root 4096 2012-09-06 00:18 num_writes
-r--r--r-- root root 4096 2012-09-06 00:18 orig_data_size
drwxr-xr-x root root 2012-09-06 00:18 power
drwxr-xr-x root root 2012-09-06 00:18 queue
-r--r--r-- root root 4096 2012-09-06 00:18 range
-r--r--r-- root root 4096 2012-09-06 00:18 removable
--w------- root root 4096 2012-09-06 00:18 reset
-r--r--r-- root root 4096 2012-09-06 00:18 ro
-r--r--r-- root root 4096 2012-09-06 00:18 size
drwxr-xr-x root root 2012-09-06 00:18 slaves
-r--r--r-- root root 4096 2012-09-06 00:18 stat
lrwxrwxrwx root root 2012-09-06 00:18 subsystem -> ../../../../
class/block
-rw-r--r-- root root 4096 2012-09-06 00:18 uevent
-r--r--r-- root root 4096 2012-09-06 00:18 zero_pages
Time to get some sleep.
k02a said:
Sure.
Code:
[email protected]:/ $ ls -la /dev/block
ls -la /dev/block
...
brw------- root root 179, 0 1980-01-06 02:01 mmcblk0
brw------- root root 179, 1 1980-01-06 02:01 mmcblk0p1
brw------- root root 31, 0 1980-01-06 02:01 mtdblock0
brw------- root root 31, 1 1980-01-06 02:01 mtdblock1
brw------- root root 31, 2 1980-01-06 02:01 mtdblock2
brw------- root root 31, 3 1980-01-06 02:01 mtdblock3
...
The listing you were asking for is not as interesting as the following:
Code:
[email protected]:/ # ls -la /sys/devices/virtual/block/zram0
ls -la /sys/devices/virtual/block/zram0
...
[/QUOTE]
why? Do you mean mtdblock0-3 are really located on zram0?
Or what else?
mtdblock0-3 don't seem to be partitions of a block device, like mmcblk0p1 is a partition on mmcblk0
Click to expand...
Click to collapse
hg42 said:
why? Do you mean mtdblock0-3 are really located on zram0?
Or what else?
mtdblock0-3 don't seem to be partitions of a block device, like mmcblk0p1 is a partition on mmcblk0
Click to expand...
Click to collapse
Sorry for my ambiguousness...
After having a bad nights' sleep, I made some re-thinking.
I dd'ed the /dev/zram0 (62 914 560 bytes). This value also corresponds to the content found in /sys/block/zram0/disksize and I find it unlikely that the OS keeps the entire amount of mtdblocks within this memory constraint, even if they are compressed. I have not tried to mount the zram-image on a Linux system, so I cannot tell anything about its content. My belief is that this image carries some RAM contents and perhaps some cache information.
Did you find anything similar in your Samsung device?
The mmcblk:s seem to represent the MicroSD-card device and I assume the mmcblk0p1 is the (only) partition.
k02a said:
Sorry for my ambiguousness...
After having a bad nights' sleep, I made some re-thinking.
I dd'ed the /dev/zram0 (62 914 560 bytes). This value also corresponds to the content found in /sys/block/zram0/disksize and I find it unlikely that the OS keeps the entire amount of mtdblocks within this memory constraint, even if they are compressed. I have not tried to mount the zram-image on a Linux system, so I cannot tell anything about its content. My belief is that this image carries some RAM contents and perhaps some cache information.
Did you find anything similar in your Samsung device?
The mmcblk:s seem to represent the MicroSD-card device and I assume the mmcblk0p1 is the (only) partition.
Click to expand...
Click to collapse
we have these block devices:
Code:
[email protected]:/ $ ls -lF /dev/block/
brw------- 1 root root 7, 0 Sep 6 08:28 loop0
brw------- 1 root root 7, 1 Sep 6 08:28 loop1
brw------- 1 root root 7, 2 Sep 6 08:28 loop2
brw------- 1 root root 7, 3 Sep 6 08:28 loop3
brw------- 1 root root 7, 4 Sep 6 08:28 loop4
brw------- 1 root root 7, 5 Sep 6 08:28 loop5
brw------- 1 root root 7, 6 Sep 6 08:28 loop6
brw------- 1 root root 7, 7 Sep 6 08:28 loop7
brw------- 1 root root 179, 0 Sep 6 08:28 mmcblk0
brw------- 1 root root 179, 1 Sep 6 08:28 mmcblk0p1
brw------- 1 root root 259, 2 Sep 6 08:28 mmcblk0p10
brw------- 1 root root 259, 3 Sep 6 08:28 mmcblk0p11
brw------- 1 root root 259, 4 Sep 6 08:28 mmcblk0p12
brw------- 1 root root 179, 2 Sep 6 08:28 mmcblk0p2
brw------- 1 root root 179, 3 Sep 6 08:28 mmcblk0p3
brw------- 1 root root 179, 4 Sep 6 08:28 mmcblk0p4
brw------- 1 root root 179, 5 Sep 6 08:28 mmcblk0p5
brw------- 1 root root 179, 6 Sep 6 08:28 mmcblk0p6
brw------- 1 root root 179, 7 Sep 6 08:28 mmcblk0p7
brw-rw---- 1 system radio 259, 0 Sep 6 08:28 mmcblk0p8
brw------- 1 root root 259, 1 Sep 6 08:28 mmcblk0p9
brw------- 1 root root 179, 8 Sep 6 08:28 mmcblk1
brw------- 1 root root 179, 9 Sep 6 08:28 mmcblk1p1
drwxr-xr-x 4 root root 0 Sep 6 08:28 platform/
brw------- 1 root root 1, 0 Sep 6 08:28 ram0
brw------- 1 root root 1, 1 Sep 6 08:28 ram1
brw------- 1 root root 1, 10 Sep 6 08:28 ram10
brw------- 1 root root 1, 11 Sep 6 08:28 ram11
brw------- 1 root root 1, 12 Sep 6 08:28 ram12
brw------- 1 root root 1, 13 Sep 6 08:28 ram13
brw------- 1 root root 1, 14 Sep 6 08:28 ram14
brw------- 1 root root 1, 15 Sep 6 08:28 ram15
brw------- 1 root root 1, 2 Sep 6 08:28 ram2
brw------- 1 root root 1, 3 Sep 6 08:28 ram3
brw------- 1 root root 1, 4 Sep 6 08:28 ram4
brw------- 1 root root 1, 5 Sep 6 08:28 ram5
brw------- 1 root root 1, 6 Sep 6 08:28 ram6
brw------- 1 root root 1, 7 Sep 6 08:28 ram7
brw------- 1 root root 1, 8 Sep 6 08:28 ram8
brw------- 1 root root 1, 9 Sep 6 08:28 ram9
drwxr-xr-x 2 root root 0 Sep 6 08:28 vold/
The ram* may be what is zram in your device.
The 'z' may indeed mean compression.
There are several tmpfs in our device (e.g. /tmp and /dev, perhaps they use these ram disks).
Also the root file system where everything is mounted runs in ram.
The zram0 seems to act like some kind of swap RAM and was obviously added to the latest SE 2011 firmware version [1].
My guess is that Sony Ericsson decided to pick the compressed alternative, due to the smaller flash memory in their Xperia 2011 devices. This solution probably costs some clock cycles, but I assume it gains in overall internal storage capacity.
I found an interesting thread where sirkay showed how to initiate/alter the zram size.
[1] questions/problems with 4.1.B.0.587 firmware
You guys are confusing.
The Xperia NAND disk device is translated to an MTD block device in the Linux world. The partition boundaries are hardcoded in the bootloader passed to the kernel via the ATAGs parameters. You can see those partitions via /proc/mtd
Code:
# cat /proc/mtd
dev: size erasesize name
mtd0: 19000000 00040000 "system"
mtd1: 00600000 00040000 "appslog"
mtd2: 06580000 00040000 "cache"
mtd3: 1a400000 00040000 "userdata"
Still those are only the partitions the bootlooader chooses to expose to the kernel. In reality, there are more, unknown to the kernel.
kuisma said:
You guys are confusing.
The Xperia NAND disk device is translated to an MTD block device in the Linux world. The partition boundaries are hardcoded in the bootloader passed to the kernel via the ATAGs parameters. You can see those partitions via /proc/mtd
Code:
# cat /proc/mtd
dev: size erasesize name
mtd0: 19000000 00040000 "system"
mtd1: 00600000 00040000 "appslog"
mtd2: 06580000 00040000 "cache"
mtd3: 1a400000 00040000 "userdata"
Still those are only the partitions the bootlooader chooses to expose to the kernel. In reality, there are more, unknown to the kernel.
Click to expand...
Click to collapse
Thanks for clearing up, this fits my conclusions.
Never saw such fixed devices before.
hg42 said:
Thanks for clearing up, this fits my conclusions.
Never saw such fixed devices before.
Click to expand...
Click to collapse
I'd say this is the way it's most commonly done in Android devices, using a raw NAND device with the MTD translation layer. It's far more uncommon using block devices, such as MMC devices as the primary internal memory.
kuisma said:
You guys are confusing.
The Xperia NAND disk device is translated to an MTD block device in the Linux world. The partition boundaries are hardcoded in the bootloader passed to the kernel via the ATAGs parameters. You can see those partitions via /proc/mtd
Code:
# cat /proc/mtd
dev: size erasesize name
mtd0: 19000000 00040000 "system"
mtd1: 00600000 00040000 "appslog"
mtd2: 06580000 00040000 "cache"
mtd3: 1a400000 00040000 "userdata"
Still those are only the partitions the bootlooader chooses to expose to the kernel. In reality, there are more, unknown to the kernel.
Click to expand...
Click to collapse
Thanks for this. :good:
I am still curious about the possibility to gain boot or root partition access in Xperia?
Many other devices come with this feature, e.g. HTC Incredible S, HTC Vision, Acer Liquid Metal and on the widely spread article HOWTO: Unpack, Edit, and Re-Pack Boot Images).
Oh, by the way...
I found a collection with recovery images on OnlineNandroid.
k02a said:
Thanks for this. :good:
I am still curious about the possibility to gain boot or root partition access in Xperia?
Many other devices come with this feature, e.g. HTC Incredible S, HTC Vision, Acer Liquid Metal and on the widely spread article HOWTO: Unpack, Edit, and Re-Pack Boot Images).
Click to expand...
Click to collapse
In Xperia, the boot partition is not visible to the Linux kernel, so you can't simply dd it to an image file. The easiest way is running Sony Update Service reflashing your phone with the current firmware, and then copy the temporary files it downloaded, recreating the FTF file using Flashtool. Unzip the FTF and you've got the boot.img. Now split it, do whatever you want to change and flash it using fastboot. There's a YouTube video showing this in detail. Search for it. Or download the firmware FTF directly from a trusted source.
I looked in fota0.sin and found a few more partition names on the Xperia (Active):
Code:
amss
amss_fs
fota0
fota1
dsp1
boot
system
userdata
cache
image_backup
amss_log
vendor
ramdump
Thanks a lot for this, a really valuable post!
I know I wont find the help I need to do what I want here, but ill provide the stuff from my Galaxy Note tomorrow (partition layout/vold)...
My Galaxy Note is nice, but 2GB is a joke for apps, and damnit I want my sdcard to actually be mounted as /sdcard! (PITA for apps that utilize /sdcard for game data and backups, not to mention having a 32GB or 64GB makes the joke 10GB internal... a JOKE!)
hg42 said:
we have these block devices:
Code:
[email protected]:/ $ ls -lF /dev/block/
brw------- 1 root root 7, 0 Sep 6 08:28 loop0
brw------- 1 root root 7, 1 Sep 6 08:28 loop1
brw------- 1 root root 7, 2 Sep 6 08:28 loop2
brw------- 1 root root 7, 3 Sep 6 08:28 loop3
brw------- 1 root root 7, 4 Sep 6 08:28 loop4
brw------- 1 root root 7, 5 Sep 6 08:28 loop5
brw------- 1 root root 7, 6 Sep 6 08:28 loop6
brw------- 1 root root 7, 7 Sep 6 08:28 loop7
brw------- 1 root root 179, 0 Sep 6 08:28 mmcblk0
brw------- 1 root root 179, 1 Sep 6 08:28 mmcblk0p1
brw------- 1 root root 259, 2 Sep 6 08:28 mmcblk0p10
brw------- 1 root root 259, 3 Sep 6 08:28 mmcblk0p11
brw------- 1 root root 259, 4 Sep 6 08:28 mmcblk0p12
brw------- 1 root root 179, 2 Sep 6 08:28 mmcblk0p2
brw------- 1 root root 179, 3 Sep 6 08:28 mmcblk0p3
brw------- 1 root root 179, 4 Sep 6 08:28 mmcblk0p4
brw------- 1 root root 179, 5 Sep 6 08:28 mmcblk0p5
brw------- 1 root root 179, 6 Sep 6 08:28 mmcblk0p6
brw------- 1 root root 179, 7 Sep 6 08:28 mmcblk0p7
brw-rw---- 1 system radio 259, 0 Sep 6 08:28 mmcblk0p8
brw------- 1 root root 259, 1 Sep 6 08:28 mmcblk0p9
brw------- 1 root root 179, 8 Sep 6 08:28 mmcblk1
brw------- 1 root root 179, 9 Sep 6 08:28 mmcblk1p1
drwxr-xr-x 4 root root 0 Sep 6 08:28 platform/
brw------- 1 root root 1, 0 Sep 6 08:28 ram0
brw------- 1 root root 1, 1 Sep 6 08:28 ram1
brw------- 1 root root 1, 10 Sep 6 08:28 ram10
brw------- 1 root root 1, 11 Sep 6 08:28 ram11
brw------- 1 root root 1, 12 Sep 6 08:28 ram12
brw------- 1 root root 1, 13 Sep 6 08:28 ram13
brw------- 1 root root 1, 14 Sep 6 08:28 ram14
brw------- 1 root root 1, 15 Sep 6 08:28 ram15
brw------- 1 root root 1, 2 Sep 6 08:28 ram2
brw------- 1 root root 1, 3 Sep 6 08:28 ram3
brw------- 1 root root 1, 4 Sep 6 08:28 ram4
brw------- 1 root root 1, 5 Sep 6 08:28 ram5
brw------- 1 root root 1, 6 Sep 6 08:28 ram6
brw------- 1 root root 1, 7 Sep 6 08:28 ram7
brw------- 1 root root 1, 8 Sep 6 08:28 ram8
brw------- 1 root root 1, 9 Sep 6 08:28 ram9
drwxr-xr-x 2 root root 0 Sep 6 08:28 vold/
Click to expand...
Click to collapse
From the above list is it possible to know the boot paritions.
on S2_lte_I9210 /proc/partitions list the system partition as /dev/block/mmcblk0p24 /system but not the boot partition.
I'm eagerly waiting to do boot.img backup using via dd command
---------- Post added at 04:20 PM ---------- Previous post was at 04:16 PM ----------
# cat /proc/partitions
major minor #blocks name
179 0 15387648 mmcblk0
179 1 102400 mmcblk0p1
179 2 500 mmcblk0p2
179 3 1500 mmcblk0p3
179 4 1 mmcblk0p4
179 5 500 mmcblk0p5
179 6 2048 mmcblk0p6
179 7 2500 mmcblk0p7
179 8 10240 mmcblk0p8
179 9 500 mmcblk0p9
179 10 500 mmcblk0p10
179 11 500 mmcblk0p11
179 12 10240 mmcblk0p12
179 13 100352 mmcblk0p13
179 14 3072 mmcblk0p14
179 15 3072 mmcblk0p15
179 16 3072 mmcblk0p16
179 17 100352 mmcblk0p17
179 18 3072 mmcblk0p18
179 19 3072 mmcblk0p19
179 20 3072 mmcblk0p20
179 21 10240 mmcblk0p21
179 22 10240 mmcblk0p22
179 23 10240 mmcblk0p23
179 24 677888 mmcblk0p24
179 25 2099200 mmcblk0p25
179 26 309248 mmcblk0p26
179 27 132096 mmcblk0p27
179 28 11738112 mmcblk0p28
179 32 15558144 mmcblk1
179 33 15557120 mmcblk1p1
Click to expand...
Click to collapse
partition list on samsung galaxy S2_lte I9210
We found the structure of the Samsung Stellar and we now know where the System, recovery, and boot images are!
This here is some of the file structures of the Samsung Stellar:
Code:
cat /proc/partitions
major minor #blocks name
179 0 3866624 mmcblk0
179 1 61440 mmcblk0p1
179 2 128 mmcblk0p2
179 3 256 mmcblk0p3
179 4 512 mmcblk0p4
179 5 2048 mmcblk0p5
179 6 512 mmcblk0p6
179 7 10240 mmcblk0p7
179 8 512 mmcblk0p8
179 9 512 mmcblk0p9
179 10 10240 mmcblk0p10
179 11 13952 mmcblk0p11
179 12 3072 mmcblk0p12
179 13 3072 mmcblk0p13
179 14 1228800 mmcblk0p14
179 15 1966080 mmcblk0p15
179 16 8192 mmcblk0p16
179 17 512000 mmcblk0p17
179 18 10240 mmcblk0p18
179 19 10240 mmcblk0p19
179 20 6144 mmcblk0p20
179 21 3072 mmcblk0p21
179 22 8 mmcblk0p22
179 23 5120 mmcblk0p23
179 64 1024 mmcblk0boot1
179 32 1024 mmcblk0boot0
179 96 1955840 mmcblk1
179 97 1081054 mmcblk1p1
179 98 750000 mmcblk1p2
179 99 124785 mmcblk1p3
To extract the images in their locations: you'll need to use these commands:
Code:
dd if=/dev/block/mmcblk0p18 of=/mnt/extSdCard/Recovery.img
dd if=/dev/block/mmcblk0p7 of=/mnt/extSdCard/boot.img
dd if=/dev/block/mmcblk0p14 of=/mnt/extSdCard/system.img
This assumes that you have an external SD card.
System Partition: http://goo.im/devs/invisiblek/i200/stock.VRALG4.system.img.tar.md5.zip
The rest of the goodies are here: http://goo.im/devs/invisiblek/i200
BIG Thanks to Invisiblek!
Romdump
sovereign73811 said:
Does anyone know how to use Romdump on a Samsung device? I read that Samsung has its own flashing structure which makes extracting the ROMs harder.
Is there any way to know how the file strucutre works or how to access the stock ROMs. Oh and yes we do have rooted devices.
This here is some of the file structures of the Samsung Stellar:
Code:
[email protected]:/dev/block # ls
ls
loop0
loop1
loop2
loop3
loop4
loop5
loop6
loop7
mmcblk0
mmcblk0boot0
mmcblk0boot1
mmcblk0p1
mmcblk0p10
mmcblk0p11
mmcblk0p12
mmcblk0p13
mmcblk0p14
mmcblk0p15
mmcblk0p16
mmcblk0p17
mmcblk0p18
mmcblk0p19
mmcblk0p2
mmcblk0p20
mmcblk0p21
mmcblk0p22
mmcblk0p23
mmcblk0p3
mmcblk0p4
mmcblk0p5
mmcblk0p6
mmcblk0p7
mmcblk0p8
mmcblk0p9
mmcblk1
mmcblk1p1
mmcblk1p2
mmcblk1p3
platform
ram0
ram1
ram10
ram11
ram12
ram13
ram14
ram15
ram2
ram3
ram4
ram5
ram6
ram7
ram8
ram9
Code:
cat /proc/partitions
major minor #blocks name
179 0 3866624 mmcblk0
179 1 61440 mmcblk0p1
179 2 128 mmcblk0p2
179 3 256 mmcblk0p3
179 4 512 mmcblk0p4
179 5 2048 mmcblk0p5
179 6 512 mmcblk0p6
179 7 10240 mmcblk0p7
179 8 512 mmcblk0p8
179 9 512 mmcblk0p9
179 10 10240 mmcblk0p10
179 11 13952 mmcblk0p11
179 12 3072 mmcblk0p12
179 13 3072 mmcblk0p13
179 14 1228800 mmcblk0p14
179 15 1966080 mmcblk0p15
179 16 8192 mmcblk0p16
179 17 512000 mmcblk0p17
179 18 10240 mmcblk0p18
179 19 10240 mmcblk0p19
179 20 6144 mmcblk0p20
179 21 3072 mmcblk0p21
179 22 8 mmcblk0p22
179 23 5120 mmcblk0p23
179 64 1024 mmcblk0boot1
179 32 1024 mmcblk0boot0
179 96 1955840 mmcblk1
179 97 1081054 mmcblk1p1
179 98 750000 mmcblk1p2
179 99 124785 mmcblk1p3
Click to expand...
Click to collapse
I tried romdump myself the other day on this, after rooting the phone, and romdump can't find /proc/mnt - I see that there is a file called /proc/mounts on the Stellar, however. I'm wondering if changing the references to /proc/mnt in the romdump script to /proc/mounts would help, but I'm a regular Linux person and am new to the way Android does things. You think this might work? I tried viewing romdump in a text editor,but it just spit out some gibberish with the word ELF at the top, which leads me to believe it is a Lua script or something. Do you know what language is being used? By the way, I'm also following your thread with moondeath on androidforums - did he ever get his situation sorted out?
Yeah we're still working on it, but so far Moondeath, AGZealot, and frankly even I have been greatly...discouraged. I wish I knew what langauge was being used for Romdump.
Moondeath so far has been unable to get the screen back so I'm wondering if there's something to the bootloader LCD Density changer did? I thought LCD Density changer only changed the OS.
Lastly, I also found something on that same site for Romdump. Take a look at this:
http://android.podtwo.com/recoverymanager/
Be careful. We only want to extract the stock images and the stock recovery mode image. If it wants to put a custom recovery/bootloader in your phone STOP, or you will be like me and have a beautifully bricked phone. Only stock images will help me now.
It's a shame too. I made some kind of backup on my phone and I can't even access it.
By the way, it's good to have another person on board with this...I just wish we can get a REAL developer on this...
OK people: here's a tip I've received from an XDA developer expert (thanks invisiblek):
Quote:
a quick and dirty explanation (need root)
Code:
dd if=/dev/block/mmcblk0p1 of=/sdcard/output.img
this will save the partition mmcblk0p1 to output.img
now, to determine what partitions are
on my device its:
Code:
ls -l /dev/block/platform/msm_sdcc.1/by-name/
but you're scheme and directory structure there might be a little different, so adjust accordingly
Longer Version:
http://www.darkyrom.com/index.php?t...o-guide-to-dump-entire-s3-data-with-adb.8059/
sovereign73811 said:
OK people: here's a tip I've received from an XDA developer expert:
Quote:
a quick and dirty explanation (need root)
Code:
dd if=/dev/block/mmcblk0p1 of=/sdcard/output.img
this will save the partition mmcblk0p1 to output.img
now, to determine what partitions are
on my device its:
Code:
ls -l /dev/block/platform/msm_sdcc.1/by-name/
but you're scheme and directory structure there might be a little different, so adjust accordingly
Click to expand...
Click to collapse
Ok, I ran the ls -l /dev/block/platform/msm_sdcc.1/by-name/ command and I do see a "backup" directory and a "recovery" directory. I also see "rpm", which leads me to believe that Android runs on Red Hat. Not sure how relevant that is, but at least there's something that directly refers to what we're looking for. I do remember being asked to back up the phone when I first powered it on after I bought it. I wonder if maybe some kind of stock image is stored there?
There is. See if you can extract the system image and the recovery image.
We think we've found the system image in mmcblk0p14.
The SYSTEM may be in
Code:
[email protected]:/ # dd if=/dev/block/mmcblk0p14 of=/sdcard/system.img bs=4096
dd if=/dev/block/mmcblk0p14 of=/sdcard/system.img bs=4096
307200+0 records in
307200+0 records out
1258291200 bytes tra
We may also have a bootloader:
Code:
[email protected]:/ #
dd if=/dev/block/mmcblk0boot1 of=/sdcard/boot1.img bs=4096
dd if=/dev/block/mmcblk0boot1 of=/sdcard/boot1.img bs=4096
[email protected]:/ # dd if=/dev/block/mmcblk0boot1 of=/sdcard/boot1.img bs=4096
256+0 records in
256+0 records out
1048576 bytes transferred in 0.130 secs (8065969 bytes/sec)
[email protected]:/ # dd if=/dev/block/mmcblk0boot0 of=/sdcard/boot0.img bs=4096
dd if=/dev/block/mmcblk0boot0 of=/sdcard/boot0.img bs=4096
256+0 records in
256+0 records out
1048576 bytes transferred in 0.129 secs (8128496 bytes/sec)
[email protected]:/ #
Now all we need is to find the recovery...
I have a theory:
I believe that the recovery partition is in "mmcblk0p20." This partition is about 6MB and I've seen Galaxy S3 recovery partitions size around 6MB.
Let's try adding this:
Code:
ls -l /dev/block/platform/msm_sdcc.1/by-name/recovery
or:
Code:
ls -l /dev/block/platform/msm_sdcc.1/mmcblk0p20
Can anyone help me confirm the theory? I would if I had a working phone.
Hey guys what's up, I have a ROM or 2 out for the skyrocket and the vzw gs3, I picked one of these up for my son and been playing with it, what is it your trying to do here? For root its easy ,but what is it your looking for and I may be able to help
Sent from my SCH-I200 using xda premium
We're trying to make a backup of the system, recovery, and boot partitions and make them into ROMs flashable to Odin or whatever we need them to be.
If you can try to shed some light on the locations of the ROMs I'd certainly be grateful.
boot recovery
Hey you think somehow if i go into boot recovery, and click on the option that says format from sdcard.. is there a way i can transfer my root files into my sd car (8GB) then root it again? So basically do something from my sd card? instead of plugging it into the comp? And the repair option for the upgrade assistant didnt work since my computer couldnt read my device.
I'm sure you've installed the Samsung USB drivers on there.
It takes much more to "transfer" the "root files" to your SD Card. The only thing you can "pull" from the phone in recovery mode is the Recovery image itself.
I can use that actually. Refer to my previous posts here on this very topic and see what you can do.
Has anyone tried any cwm recoveries yet?
Sent from my SCH-I200 using xda premium
DON'T DO IT! Unless you want to brick your phone. I did something similar and that's how I'm in my predicament.
Before you do anything else PLEASE backup your ROMs. Look at my past posts of this topic; I think we've found some of the ROMs.
sovereign73811 said:
I have a theory:
I believe that the recovery partition is in "mmcblk0p20." This partition is about 6MB and I've seen Galaxy S3 recovery partitions size around 6MB.
Let's try adding this:
Code:
ls -l /dev/block/platform/msm_sdcc.1/by-name/recovery
or:
Code:
ls -l /dev/block/platform/msm_sdcc.1/mmcblk0p20
Can anyone help me confirm the theory? I would if I had a working phone.
Click to expand...
Click to collapse
a/local/bin:$PATH <
/platform/msm_sdcc.1/mmcblk0p20 <
lrwxrwxrwx root root 1970-01-13 18:02 mmcblk0p20 -> /dev/block/mmcblk0p20
/platform/msm_sdcc.1/by-name/recovery <
lrwxrwxrwx root root 1970-01-13 18:02 recovery -> /dev/block/mmcblk0p18
[email protected]:/ $
So it's in mmcblk0p18? Hmm...can you extract anything out of it?
And I'll ask again: If any of you are successful in extracting the ROMs, please upload them. I need my Stellar back up and running soon!
Sure, I can try to extract something - any tips on how to do that? I can obviously just Google it, but I'm new to the Android environment. If I could get the device to talk to my Linux box, I could probably do a lot more, but it doesn't recognize the device via MTP, which is another battle I'm working on. As a result, I have either use my work laptop, which runs Windows, or I have to do it directly from the phone.
If I know the code enough, I believe that these commands through adb will extract the partitions in an image file. You can look at the very first post of the topic; I've updated it with some compiled information I've gathered.
So I too am new to android. I just attempted a rom dump using the podtwo romdump/adb method, and I am pretty sure that it did not complete as it should have. Here is the output
Code:
C:\Users\gravewood\AppData\Local\Android\android-sdk\platform-tools>adb push romdump
/data/local
2587 KB/s (1149900 bytes in 0.434s)
C:\Users\gravewood\AppData\Local\Android\android-sdk\platform-tools>adb shell chmod
04755 /data/local/romdump
C:\Users\gravewood\AppData\Local\Android\android-sdk\platform-tools>adb shell /data/
local/romdump
Android ROM dumper v0.82b
(c)2011 Sebastian404
You need to be rooted to run this aplication
Device : IMM76D.I200VRALG4
Creating required files... cat: can't open '/proc/mtd': No such file or director
y
done.
Opening mtd table... Segmentation fault
C:\Users\gravewood\AppData\Local\Android\android-sdk\platform-tools>
It did not create the sub directory named after my device so what is in the zip is all I have, taking a smoke break hope someone can work with it let me know what else I can do to help.
ROMDump doesn't work because of Samsung's proprietary partitioning. Try looking around here instead.
Hi all,
I am in the process of porting the dual boot ramfs from the Galaxy S3 Siyah kernel to our Note II smartphones.
I have finished editing the ramfs, and changing the init files ect.
But the is still two files I have left to edit, and I am a bit stuck on them.
In the files /sbin/init and /sbin/ueventd the is quite a few references to theses partitions:
mknod /dev/block/mmcblk0p13 b 179 9
mknod /dev/block/mmcblk0p16 b 179 12
Click to expand...
Click to collapse
the problem is this, on the Galaxy S3 (which is what that ramfs was designed for) those partitions dont exist as far as I can see.
But on the note 2, those partitions are the /DATA and /SYSTEM partitions.
So I need to change thoses partitions to something else, but I dont know what.
I have copied the contents of the two files which thoses partitions are referenced in, and a table showing the Note 2 partitions and the coresponing S3 partitions, below
Could someone please help me find out what I should do here, as I cant do any more on the dual boot kernel till I get that sorted.
Here is the question I asked gokhan moral:
“I have edited all the files in the ramfs, apart from two files.
In the files /sbin/init and /sbin/ueventd the is 2 partitions referenced thru out them, they are:
mknod /dev/block/mmcblk0p13 b 179 9
mknod /dev/block/mmcblk0p16 b 179 12v
On the Galaxy S3, thoses partition names are un-used (as far as i know)
But on the Galaxy Note 2, thoses partitions are the /DATA and /SYSTEM partitions.
can i just change the partition names in thoses 2 files to soemthing like:
mknod /dev/block/mmcblk0p17 b 179 9
mknod /dev/block/mmcblk0p18 b 179 12v
or do i need to do something else to rename thoses two partitions?.”
Click to expand...
Click to collapse
And here is Gokhan Morals Response:
“block devices are created using the major and minor id's specific to your device (those do not change normally but you need to check anyway). so if they are mounted and needed you create them. if they are not needed in the script you don't have to create them. you have to try to keep the same functionality in the script. if you mount /system then you will need the block device that corresponds to /system with the correct major and minor numbers.”
Click to expand...
Click to collapse
but I still dont understand what I am supposed to do (I am not really a developer, I am more of a web designer ect)
Could someone please explain in simpler steps what I should do to rename thoses two partitions.
Here are the file contents (both files have the same contents, so i have only copied one here)
INIT:
#!/sbin/busybox sh
cd /
busybox mount -t proc proc /proc
busybox mount -t sysfs sysfs /sys
if busybox grep -q 1 /sys/class/power_supply/battery/batt_lp_charging ; then
# low power mode
echo 0 > /proc/sys/kernel/rom_feature_set
cp -a /res/misc/init.41/* /
chmod 755 /innt
chmod 644 /*.rc
chmod 644 /*.prop
exec /sbin/init2
fi
SECONDROM=1
NOBOOTLOGO=0
mkdir -p /dev/block
mkdir /dev/input
mkdir /dev/graphics
mknod /dev/graphics/fb0 c 29 0
mknod /dev/input/event1 c 13 65
mknod /dev/input/event2 c 13 66
mknod /dev/input/event8 c 13 72
mknod /dev/input/event9 c 13 73
mknod /dev/ashmem c 10 60
mknod /dev/block/mmcblk0p13 b 179 9
mknod /dev/block/mmcblk0p16 b 179 12
mknod /dev/block/loop0 b 7 0
mkdir /mnt
chmod 755 /mnt
mkdir /.secondrom
mount -t ext4 /dev/block/mmcblk0p16 /.secondrom
NEXTBOOT=`cat /.secondrom/media/.nextboot`
rm -f /.secondrom/media/.nextboot
DEFAULTROM=`cat /.secondrom/media/.defaultrom`
if grep -q bootmode=2 /proc/cmdline ; then
NEXTBOOT=0
fi
if [ "$NEXTBOOT" == "0" ]; then
mv -f /res/etc /
umount /.secondrom
echo 0 > /proc/sys/kernel/rom_feature_set
mv -f /res/misc/init.41/* /
mv -f /res/misc/recovery/* /
chmod 755 /innt
chmod 644 /*.smdk4x12
chmod 644 /*.rc
chmod 644 /*.prop
chmod -R 755 /lib
exec /sbin/init2
fi
SECONDROM=1
NOBOOTLOGO=0
[ -f /.secondrom/media/.secondrom/system.img ] || SECONDROM=0
[ -f /.secondrom/media/.nobootlogo ] && NOBOOTLOGO=1
if [ "$SECONDROM" == "0" ];then
if [ "$NOBOOTLOGO" == "0" ];then
/sbin/choose_rom $SECONDROM
fi
else
if [ "$NEXTBOOT" == "1" ];then
SECONDROM=0;
elif [ "$NEXTBOOT" == "2" ];then
SECONDROM=1;
else
if [ "$NOBOOTLOGO" == "1" ];then
SECONDROM=$DEFAULTROM
elif [ "$DEFAULTROM" == "1" ];then
/sbin/choose_rom $SECONDROM
if [ "$?" == "1" ]; then
SECONDROM=0
else
SECONDROM=1
fi
else
/sbin/choose_rom $SECONDROM
if [ "$?" == "1" ]; then
SECONDROM=1
else
SECONDROM=0
fi
fi
fi
fi
if [ "$SECONDROM" == "1" ]; then
mount -t ext4 /.secondrom/media/.secondrom/system.img /system
else
mount -t ext4 /dev/block/mmcblk0p13 /system
fi
AOSP=0
MIUI=0
CM10=0
JB=0
[ -f /system/framework/framework2.jar ] || AOSP=1
[ -f /system/framework/miui-framework.jar ] && MIUI=1
[ -f /system/lib/ssl/engines/libkeystore.so ] && JB=1
[ -f /system/framework/seccamera.jar ] || CM10=1
if [ "$JB" == 1 ];
then
if [ "$CM10" == 1 ];
then
echo 3 > /proc/sys/kernel/rom_feature_set
mv -f /lib/modules/dhd_cm.ko /lib/modules/dhd.ko
mv -f /res/misc/init.cm10/* /
else
echo 2 > /proc/sys/kernel/rom_feature_set
mv -f /res/misc/init.41/* /
fi
fi
if [ "$SECONDROM" == "1" ];then
mv /init.smdk4x12.rc.2 /init.smdk4x12.rc
mv /init.rc.2 /init.rc
mv /fstab.smdk4x12.2 /fstab.smdk4x12
else
rm -f /init.rc.2 /init.smdk4x12.rc.2 /fstab.smdk4x12.2
fi
umount -f /system
umount -f /.secondrom
rm -rf /res/misc/init*
chmod 755 /innt
chmod 644 /*.smdk4x12
chmod 644 /*.rc
chmod 644 /*.prop
chmod -R 755 /lib
# misc mods for i9300
insmod /lib/modules/m0_mods.ko
# cpu undervolting interfaces
insmod /lib/modules/cpu_undervolting.ko
# mali (gpu) interfaces
insmod /lib/modules/mali_control.ko
# additional CPU governors
insmod /lib/modules/cpufreq_hotplug.ko
insmod /lib/modules/cpufreq_lulzactiveq.ko
# additional I/O schedulers
insmod /lib/modules/sio-iosched.ko
insmod /lib/modules/vr-iosched.ko
# audio enhancements
insmod /lib/modules/kscoobydoo.ko devicename=scoobydoo_sound
exec /sbin/init2
Click to expand...
Click to collapse
And here is the partition layouts:
PARTITION: ` Galaxy S3 Galaxy Note 2
/BOOT mmcblk0p5 mmcblk0p8
/BOTA0 mmcblk0p1 mmcblk0p1
/BOTA1 mmcblk0p2 mmcblk0p2
/CACHE mmcblk0p8 mmcblk0p12
/EFS mmcblk0p3 mmcblk0p3
/HIDDEN mmcblk0p10 mmcblk0p14
/OTA mmcblk0p11 mmcblk0p15
/PARAM mmcblk0p4 mmcblk0p7
/RADIO mmcblk0p7 mmcblk0p10
/RECOVERY mmcblk0p6 mmcblk0p9
/SYSTEM mmcblk0p9 mmcblk0p13
/TOMBSTONES unknown mmcblk0p11
/USERDATA mmcblk0p12 mmcblk0p16
Click to expand...
Click to collapse
I think i copied thoses partitions right from my pc, but i may have got one mixed up or something
Please can someone help, as i have been searching for days, and asking lots of different people on xda, but no response
Thanks in advance
Cheers
Corey
First, if "herbew" is a friend of yours, please ask him to never send me a PM asking me to help someone ELSE. That's just spam.
On the i9300 (and Note2) devices, I'm surprised to see any calls at all to mknod. Most of the device files are created automatically these days. However, I'm NOT familiar with Gokhan's dual boot thing (I've never used it and I don't have an i9300 anymore to tinker with it.) I'm assuming that you'd like to reverse engineer what Gokhan has done and it's often more fun to work backwards than to just nag him until he helps. So, I can't answer how to make it work, but I might be able to help you to reverse engineer or understand what is going on.
To find out more about your device nodes for mmcblk devices, you can run the following command (rooted, of course):
Code:
ls -l /dev/block/mmc*
The output will contain several lines similar to:
Code:
brw-rw---- 1 system root 179, 7 Dec 18 22:28 mmcblk0p7
In this case, the device major id is 179 and the minor id is 7. To see what those major ID's are, run "cat /proc/devices". (This doesn't show ALL device ID's used by the system, but covers most of them.) Another way to see all the partitions within the system is "cat /proc/partitions".
Doing the above on a i9300 both with and without the dual boot stuff might give some hints as to what changes the dualboot thing is making. You might also consider taking a look at whatever is used to install that dualboot stuff. Is it ONLY a kernel, or something more? Is it re-partitioning the device?
From what I could see of that init file, p16 is a partition used to store the secondary boot related flags and a system image. p13 appears to be the "primary" /system image partition.
Some questions to ask yourself:
What is the /system partition on a normal (non-dualboot) i9300? Is it p13 or something else? Does p16 exist in /proc/partitions on a non-dualboot system? In that non-dual boot setup, is there ANY device with a major of 179 and minor of 12? (My first thought would be it would be named mmcblk0p12)
Disclaimer: I'm going to try to avoid solving this for you. I'd prefer if I can guide you to solving it yourself and then sharing the results.
garyd9 said:
First, if "herbew" is a friend of yours, please ask him to never send me a PM asking me to help someone ELSE. That's just spam.
On the i9300 (and Note2) devices, I'm surprised to see any calls at all to mknod. Most of the device files are created automatically these days. However, I'm NOT familiar with Gokhan's dual boot thing (I've never used it and I don't have an i9300 anymore to tinker with it.) I'm assuming that you'd like to reverse engineer what Gokhan has done and it's often more fun to work backwards than to just nag him until he helps. So, I can't answer how to make it work, but I might be able to help you to reverse engineer or understand what is going on.
To find out more about your device nodes for mmcblk devices, you can run the following command (rooted, of course):
Code:
ls -l /dev/block/mmc*
The output will contain several lines similar to:
Code:
brw-rw---- 1 system root 179, 7 Dec 18 22:28 mmcblk0p7
In this case, the device major id is 179 and the minor id is 7. To see what those major ID's are, run "cat /proc/devices". (This doesn't show ALL device ID's used by the system, but covers most of them.) Another way to see all the partitions within the system is "cat /proc/partitions".
Doing the above on a i9300 both with and without the dual boot stuff might give some hints as to what changes the dualboot thing is making. You might also consider taking a look at whatever is used to install that dualboot stuff. Is it ONLY a kernel, or something more? Is it re-partitioning the device?
From what I could see of that init file, p16 is a partition used to store the secondary boot related flags and a system image. p13 appears to be the "primary" /system image partition.
Some questions to ask yourself:
What is the /system partition on a normal (non-dualboot) i9300? Is it p13 or something else? Does p16 exist in /proc/partitions on a non-dualboot system? In that non-dual boot setup, is there ANY device with a major of 179 and minor of 12? (My first thought would be it would be named mmcblk0p12)
Disclaimer: I'm going to try to avoid solving this for you. I'd prefer if I can guide you to solving it yourself and then sharing the results.
Click to expand...
Click to collapse
Hi,
Yes Herbew is a friend of mine, but i didn't tell him to start private messaging people like that lol, I think he just gets a bit carried away, I will tell him to stop .
I will try running thoses commands on my note 2 to get the device id ect tomorrow thanks.
And on a normal S3, the is no partitions past p12 (I think the /system partition is either p7 or p9, i will check tomorrow) hence why I am stuck
I don't have a galaxy S3, so i can't run thoses commands u said, is the any other way I can work it out?, without spending $500 on a s3?. Thanks.
Thanks for your help.
Sent from my GT-N7100
fishingfon said:
I don't have a galaxy S3, so i can't run thoses commands u said, is the any other way I can work it out?, without spending $500 on a s3?. Thanks.
Click to expand...
Click to collapse
If I wanted that info, I'd probably post a message in the i9300/General section titled "Need a rooted user to help" and containing a message body similar to:
Can someone who is rooted, comfortable with a shell prompt, and NOT running any kind of dualboot, please run the following commands and send me (or reply with) the results? "ls -l /dev/block/mmc*", "cat /proc/devices", and "cat /proc/partitions"
Thank you,
YourNameHere
Click to expand...
Click to collapse
You might also ask that a person who IS running dualboot do the same thing so you can compare them. Just be sure that they tell you if they are/aren't doing dualboot so you don't get mixed up which is which. Another thing that might be helpful is to compare the init scripts of a non-dualboot kernel's initramfs with the ones you already have. Understanding what is different might be the key to understanding what you'll have to change on the note2.
Gary
garyd9 said:
If I wanted that info, I'd probably post a message in the i9300/General section titled "Need a rooted user to help" and containing a message body similar to:
You might also ask that a person who IS running dualboot do the same thing so you can compare them. Just be sure that they tell you if they are/aren't doing dualboot so you don't get mixed up which is which. Another thing that might be helpful is to compare the init scripts of a non-dualboot kernel's initramfs with the ones you already have. Understanding what is different might be the key to understanding what you'll have to change on the note2.
Gary
Click to expand...
Click to collapse
Ok thanks, I will make a thread in the s3 section tomorrow.
I have already replaced all the init files in /res/misc/init.41 with the stock ones from the root of the ramfs from a stock boot img (when the phone starts, if it detects a jb stock rom, it will move all the init files from init.41 to the root of the ramfs). So they are already stock.
I will have another look thru the stock Sammy ramfs tomorrow, and see if I can find a init file in /sbin (where the one i am having trouble with came from).
I can't get on my pc right now, as the is about 200 ants that have decided to move in to the laptop, so i need to figure out how to remove them before I can look
Thanks again for your help.
Corey
Sent from my GT-N7100
Still no luck
http://forum.xda-developers.com/showthread.php?t=2058538
Cheers
Corey
Sent from my GT-N7100
garyd9 said:
If I wanted that info, I'd probably post a message in the i9300/General section titled "Need a rooted user to help" and containing a message body similar to:
You might also ask that a person who IS running dualboot do the same thing so you can compare them. Just be sure that they tell you if they are/aren't doing dualboot so you don't get mixed up which is which. Another thing that might be helpful is to compare the init scripts of a non-dualboot kernel's initramfs with the ones you already have. Understanding what is different might be the key to understanding what you'll have to change on the note2.
Gary
Click to expand...
Click to collapse
Hi,
I have got the results from typing 2 of the things in the terminal on the s3, and I will compare them when I get home, but i havent got the results from typing "ls -l /dev/block/mmc*" tho, do i really need the results from that command, or are the ones from the other 2 commands enough?.
Thanks
Cheers
Corey
EDIT: i have found someone to get me the results from "
ls -l /dev/block/mmc" so ignore the message above
Sent from my GT-N7100
Hi,
I have got the results from thoses 3 commands u said to run in the terminal, and u can see the is 3 extra devices when the dual boot kernel is installed on the S3. theses are the devices:
brw------- root root 179, 16 2012-12-22 12:53 mmcblk0boot0
brw------- root root 179, 32 2012-12-22 12:53 mmcblk0boot1
7 1 1572864 loop1
Here are the full results from the terminal:
Code:
"Siyah Dual boot 1.8.4,booted in to 2nd Rom ParanoidAndroid 2.54"
[email protected]:/ $ su
[email protected]:/ # ls -l /dev/block/mmc*
brw------- root root 179, 0 2012-12-22 12:53 mmcblk0
brw------- root root 179, 16 2012-12-22 12:53 mmcblk0boot0
brw------- root root 179, 32 2012-12-22 12:53 mmcblk0boot1
brw------- root root 179, 1 2012-12-22 12:53 mmcblk0p1
brw------- root root 179, 10 2012-12-22 12:53 mmcblk0p10
brw------- root root 179, 11 2012-12-22 12:53 mmcblk0p11
brw------- root root 179, 12 2012-12-22 12:53 mmcblk0p12
brw------- root root 179, 2 2012-12-22 12:53 mmcblk0p2
brw------- root root 179, 3 2012-12-22 12:53 mmcblk0p3
brw-rw---- system system 179, 4 2012-12-22 12:53 mmcblk0p4
brw------- root root 179, 5 2012-12-22 12:53 mmcblk0p5
brw------- root root 179, 6 2012-12-22 12:53 mmcblk0p6
brw-rw---- system radio 179, 7 2012-12-22 12:53 mmcblk0p7
brw------- root root 179, 8 2012-12-22 12:53 mmcblk0p8
brw------- root root 179, 9 2012-12-22 12:53 mmcblk0p9
brw------- root root 179, 48 2012-12-22 12:53 mmcblk1
brw------- root root 179, 49 2012-12-22 12:53 mmcblk1p1
[email protected]:/ # cat /proc/devices
Character devices:
1 mem
4 /dev/vc/0
4 tty
4 ttyS
5 /dev/tty
5 /dev/console
5 /dev/ptmx
7 vcs
10 misc
13 input
21 sg
29 fb
81 video4linux
89 i2c
108 ppp
116 alsa
128 ptm
136 pts
153 spi
180 usb
188 ttyUSB
189 usb_device
204 ttySAC
216 rfcomm
243 ump
244 mali
248 ttyGS
249 roccat
250 BaseRemoteCtl
251 media
252 usbmon
253 tzic
254 rtc
Block devices:
1 ramdisk
259 blkext
7 loop
8 sd
65 sd
66 sd
67 sd
68 sd
69 sd
70 sd
71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
179 mmc
254 device-mapper
[email protected]:/ # cat /proc/partitions
major minor #blocks name
7 0 1572864 loop0
7 1 1572864 loop1
179 0 15388672 mmcblk0
179 1 4096 mmcblk0p1
179 2 4096 mmcblk0p2
179 3 20480 mmcblk0p3
179 4 8192 mmcblk0p4
179 5 8192 mmcblk0p5
179 6 8192 mmcblk0p6
179 7 32768 mmcblk0p7
179 8 1048576 mmcblk0p8
179 9 1572864 mmcblk0p9
179 10 573440 mmcblk0p10
179 11 8192 mmcblk0p11
179 12 12091392 mmcblk0p12
179 32 2048 mmcblk0boot1
179 16 2048 mmcblk0boot0
179 48 30657536 mmcblk1
179 49 30653440 mmcblk1p1
[email protected]:/ #
Code:
"Siyah DualBoot 1.8.4,booted in to 1st rom XXELKC Samsung Rom"
[email protected]:/ $ su
[email protected]:/ # ls -l /dev/block/mmc*
brw------- root root 179, 0 2012-12-22 12:10 mmcblk0
brw------- root root 179, 16 2012-12-22 12:10 mmcblk0boot0
brw------- root root 179, 32 2012-12-22 12:10 mmcblk0boot1
brw------- root root 179, 1 2012-12-22 12:10 mmcblk0p1
brw------- root root 179, 10 2012-12-22 12:10 mmcblk0p10
brw------- root root 179, 11 2012-12-22 12:10 mmcblk0p11
brw------- root root 179, 12 2012-12-22 12:10 mmcblk0p12
brw------- root root 179, 2 2012-12-22 12:10 mmcblk0p2
brw------- root root 179, 3 2012-12-22 12:10 mmcblk0p3
brw-rw---- system system 179, 4 2012-12-22 12:11 mmcblk0p4
brw------- root root 179, 5 2012-12-22 12:10 mmcblk0p5
brw------- root root 179, 6 2012-12-22 12:10 mmcblk0p6
brw-rw---- system radio 179, 7 2012-12-22 12:10 mmcblk0p7
brw------- root root 179, 8 2012-12-22 12:10 mmcblk0p8
brw------- root root 179, 9 2012-12-22 12:10 mmcblk0p9
brw------- root root 179, 48 2012-12-22 12:10 mmcblk1
brw------- root root 179, 49 2012-12-22 12:10 mmcblk1p1
[email protected]:/ # cat /proc/devices
Character devices:
1 mem
4 /dev/vc/0
4 tty
4 ttyS
5 /dev/tty
5 /dev/console
5 /dev/ptmx
7 vcs
10 misc
13 input
21 sg
29 fb
81 video4linux
89 i2c
108 ppp
116 alsa
128 ptm
136 pts
153 spi
180 usb
188 ttyUSB
189 usb_device
204 ttySAC
216 rfcomm
243 ump
244 mali
248 ttyGS
249 roccat
250 BaseRemoteCtl
251 media
252 usbmon
253 tzic
254 rtc
Block devices:
1 ramdisk
259 blkext
7 loop
8 sd
65 sd
66 sd
67 sd
68 sd
69 sd
70 sd
71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
179 mmc
254 device-mapper
[email protected]:/ # cat /proc/partitions
major minor #blocks name
7 0 2111 loop0
179 0 15388672 mmcblk0
179 1 4096 mmcblk0p1
179 2 4096 mmcblk0p2
179 3 20480 mmcblk0p3
179 4 8192 mmcblk0p4
179 5 8192 mmcblk0p5
179 6 8192 mmcblk0p6
179 7 32768 mmcblk0p7
179 8 1048576 mmcblk0p8
179 9 1572864 mmcblk0p9
179 10 573440 mmcblk0p10
179 11 8192 mmcblk0p11
179 12 12091392 mmcblk0p12
179 32 2048 mmcblk0boot1
179 16 2048 mmcblk0boot0
179 48 30657536 mmcblk1
179 49 30653440 mmcblk1p1
254 0 2110 dm-0
[email protected]:/ #
Code:
"Stock Kernel (ELK4) + XXELKC Samsung Rom"
[email protected]:/ $ su
[email protected]:/ # ls -l /dev/block/mmc*
brw------- root root 179, 0 2012-12-22 12:57 mmcblk0
brw------- root root 179, 1 2012-12-22 12:57 mmcblk0p1
brw------- root root 179, 10 2012-12-22 12:57 mmcblk0p10
brw------- root root 179, 11 2012-12-22 12:57 mmcblk0p11
brw------- root root 179, 12 2012-12-22 12:57 mmcblk0p12
brw------- root root 179, 2 2012-12-22 12:57 mmcblk0p2
brw------- root root 179, 3 2012-12-22 12:57 mmcblk0p3
brw-rw---- system system 179, 4 2012-12-22 12:58 mmcblk0p4
brw------- root root 179, 5 2012-12-22 12:57 mmcblk0p5
brw------- root root 179, 6 2012-12-22 12:57 mmcblk0p6
brw-rw---- system radio 179, 7 2012-12-22 12:57 mmcblk0p7
brw------- root root 179, 8 2012-12-22 12:57 mmcblk0p8
brw------- root root 179, 9 2012-12-22 12:57 mmcblk0p9
brw------- root root 179, 16 2012-12-22 12:57 mmcblk1
brw------- root root 179, 17 2012-12-22 12:57 mmcblk1p1
[email protected]:/ # cat /proc/devices
Character devices:
1 mem
4 /dev/vc/0
4 tty
4 ttyS
5 /dev/tty
5 /dev/console
5 /dev/ptmx
7 vcs
10 misc
13 input
21 sg
29 fb
81 video4linux
89 i2c
108 ppp
116 alsa
128 ptm
136 pts
153 spi
180 usb
188 ttyUSB
189 usb_device
204 ttySAC
216 rfcomm
243 ump
244 mali
248 roccat
249 BaseRemoteCtl
250 media
251 ttyGS
252 usbmon
253 tzic
254 rtc
Block devices:
1 ramdisk
259 blkext
7 loop
8 sd
65 sd
66 sd
67 sd
68 sd
69 sd
70 sd
71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
179 mmc
254 device-mapper
[email protected]:/ # cat /proc/partitions
major minor #blocks name
7 0 2111 loop0
179 0 15388672 mmcblk0
179 1 4096 mmcblk0p1
179 2 4096 mmcblk0p2
179 3 20480 mmcblk0p3
179 4 8192 mmcblk0p4
179 5 8192 mmcblk0p5
179 6 8192 mmcblk0p6
179 7 32768 mmcblk0p7
179 8 1048576 mmcblk0p8
179 9 1572864 mmcblk0p9
179 10 573440 mmcblk0p10
179 11 8192 mmcblk0p11
179 12 12091392 mmcblk0p12
179 16 30657536 mmcblk1
179 17 30653440 mmcblk1p1
254 0 2110 dm-0
[email protected]:/ #
And here is the results I got from typing the commands in my Note
II
Code:
[email protected]:/ $ export PATH=/data/local/bin:$PATH
[email protected]:/ $ su
[email protected]:/ # ls -l /dev/block/mmc*
brw------- root root 179, 0 2012-12-22 08:35 mmcblk0
brw------- root root 179, 1 2012-12-22 08:35 mmcblk0p1
brw-rw---- system radio 179, 10 2012-12-22 08:35 mmcblk0p10
brw-rw---- system radio 179, 11 2012-12-22 08:35 mmcblk0p11
brw------- root root 179, 12 2012-12-22 08:35 mmcblk0p12
brw------- root root 179, 13 2012-12-22 08:35 mmcblk0p13
brw------- root root 179, 14 2012-12-22 08:35 mmcblk0p14
brw------- root root 179, 15 2012-12-22 08:35 mmcblk0p15
brw------- root root 259, 0 2012-12-22 08:35 mmcblk0p16
brw------- root root 179, 2 2012-12-22 08:35 mmcblk0p2
brw------- root root 179, 3 2012-12-22 08:35 mmcblk0p3
brw-rw---- system radio 179, 4 2012-12-22 08:35 mmcblk0p4
brw-rw---- system radio 179, 5 2012-12-22 08:35 mmcblk0p5
brw-rw---- system radio 179, 6 2012-12-22 08:35 mmcblk0p6
brw-rw---- system root 179, 7 2012-12-22 08:35 mmcblk0p7
brw------- root root 179, 8 2012-12-22 08:35 mmcblk0p8
brw------- root root 179, 9 2012-12-22 08:35 mmcblk0p9
brw------- root root 179, 16 2012-12-22 08:35 mmcblk1
brw------- root root 179, 17 2012-12-22 08:35 mmcblk1p1
[email protected]:/ # cat /proc/devices
Character devices:
1 mem
4 /dev/vc/0
4 tty
4 ttyS
5 /dev/tty
5 /dev/console
5 /dev/ptmx
7 vcs
10 misc
13 input
21 sg
29 fb
81 video4linux
89 i2c
108 ppp
116 alsa
128 ptm
136 pts
153 spi
180 usb
188 ttyUSB
189 usb_device
204 ttySAC
216 rfcomm
243 ump
244 mali
248 roccat
249 BaseRemoteCtl
250 media
251 ttyGS
252 usbmon
253 tzic
254 rtc
Block devices:
1 ramdisk
259 blkext
7 loop
8 sd
65 sd
66 sd
67 sd
68 sd
69 sd
70 sd
71 sd
128 sd
129 sd
130 sd
131 sd
132 sd
133 sd
134 sd
135 sd
179 mmc
254 device-mapper
[email protected]:/ # cat /proc/partitions
major minor #blocks name
7 0 47849 loop0
7 1 12506 loop1
7 2 14585 loop2
7 3 2111 loop3
7 4 3150 loop4
7 5 35375 loop5
7 6 34335 loop6
7 7 2111 loop7
179 0 15388672 mmcblk0
179 1 4096 mmcblk0p1
179 2 4096 mmcblk0p2
179 3 20480 mmcblk0p3
179 4 4096 mmcblk0p4
179 5 4096 mmcblk0p5
179 6 4096 mmcblk0p6
179 7 8192 mmcblk0p7
179 8 8192 mmcblk0p8
179 9 8192 mmcblk0p9
179 10 90112 mmcblk0p10
179 11 4096 mmcblk0p11
179 12 1400832 mmcblk0p12
179 13 2097152 mmcblk0p13
179 14 573440 mmcblk0p14
179 15 8192 mmcblk0p15
259 0 11141120 mmcblk0p16
179 16 62367744 mmcblk1
179 17 62351360 mmcblk1p1
254 0 47848 dm-0
254 1 12505 dm-1
254 2 14584 dm-2
254 3 2110 dm-3
254 4 3150 dm-4
254 5 35374 dm-5
254 6 34335 dm-6
254 7 2110 dm-7
7 8 13545 loop8
254 8 13545 dm-8
7 9 16664 loop9
254 9 16663 dm-9
7 10 2111 loop10
254 10 2110 dm-10
7 11 43691 loop11
254 11 43690 dm-11
7 12 8348 loop12
254 12 8347 dm-12
7 13 9387 loop13
254 13 9387 dm-13
7 14 21861 loop14
254 14 21861 dm-14
[email protected]:/ #
Do u know how I would get thoses two extra partitions on the note 2?. are thoses the same partitions that I mentioned in the first post (p13 and p16)??.
Thanks again for your help.
Corey
Ps,
The /system and /data partitions on a stick non-dual boot s3 are p9 and p12, and they have the minor of 9 and 12, just like the partitions p13 and p16 I mentioned in the first post. But the partitions on the first post have different names. Do u have any idea why that could be?.
Cheers
Corey
Sent from my GT-N7100
What I'm NOT seeing is the mmcblk0p13 and mmcblk0p16 devices that are supposedly made by the init script on the dual boot s3. Any idea why not?
garyd9 said:
What I'm NOT seeing is the mmcblk0p13 and mmcblk0p16 devices that are supposedly made by the init script on the dual boot s3. Any idea why not?
Click to expand...
Click to collapse
Hi,
No I have no idea
Also I can't find anything in the script about the 3 devices that are made, so i have absolutely no idea.
I asked Gokhan moral about them, and here is my message and then his:
" Hi,
I have spent the last day or two trying to figure out how to change the names of theses partitions that are referenced in /sbin/init
mknod /dev/block/mmcblk0p13 b 179 9
mknod /dev/block/mmcblk0p16 b 179 12
But well I was doing that (I still haven't worked it out ). I noticed that when the dual boot is installed on a galaxy S3, the is 3 extra devices in dev/block
they are:
brw------- root root 179, 16 2012-12-22 12:53 mmcblk0boot0
brw------- root root 179 32 2012-12-22 12:53 mmcblk0boot1
7 1 1572864 loop1
I have already been thru the scripts lots of times, and I never noticed any partitions named this. I was just wondering if you could explain what files theses partitions are referenced in?. as I cant find them anywhere."
And here is his response:
" They are not referenced in any of my modifications because they are not needed for any of my customizations. I only create devices that I want to mount and mount them to some directories and try to understand the rom type. Once I get the rom type I initialize the corresponding init sequence by moving init files to the original location, move innt to init and exec it. That is all and there is no more in those scripts. Now try to read them once again and try to map my descriptions to that script. When I say init script I mean the symbolic link from /init to /sbin/init. "
Do u have any idea what I should do?, as i am a bit stuck
Thanks
Cheers
Corey
Sent from my GT-N7100
Okay...
First, the mmc*boot? device nodes are for the boot loaders - please ignore those device nodes. Act like they don't exist. Don't mess with them. Ever. If there's one way to brick a samsung phone, it's by messing up the bootloaders. (Thanks to people like Adam Outler, you might still be able to recover, but only via hardware tinkering.)
So, let's back up and not be concerned about what the device nodes are named, but more concerned about what the device nodes are USED FOR (in relation to dual booting.) If I'm correct, you really aren't concerned about those device node names, but are more concerned about getting the dual boot working.
Is that init script in the OP unmolested? The reason I'm asking is that parts of it aren't making sense to me. For example, it's mounting the /system directory either via an image file OR from mmcblk0p13. However, you've stated that the SGS3 has the SYSTEM partition on mmcblk0p9. It almost appears as if you (or someone else) might have started editing the init script to make it work with a device that has the system partition on p13 (such as the note2.) That would also match with the fact that p16 on the Note2 is the data (userdata) partition...
Actually, that might be exactly what's going on here. The mknod parameters are creating device nodes to the existing p9/p12 partitions, but giving them different names that just happen to match the names used on the Note2...
You could, in theory, do something similar to what you suggested in your OP, but you'd need to do it a bit differently.... Instead of making device nodes with unused names and minors of 9/12, you'd want to use unused names and minors of 13 and 16. Let me explain...
Here is the code you said was in the sgs3 init script (along with comments followed by "//")
Code:
mknod /dev/block/mmcblk0p13 b 179 9 // creates a device node called p13 but is identical to p9
mknod /dev/block/mmcblk0p16 b 179 12 // creates a device node called p16 but is identical to p12
So, in your init script, /dev/block/mmcblk0p13 is referencing the EXACT SAME DEVICE as /dev/block/mmcblk0p9 (and the same for the created p16 device and the already existing p12 device.)
Wow, I really hope that not only am I making sense, but also that you are following me. I'm going to start rambling even more.
You kind of have to understand how device nodes work, etc. The NAME of the device node doesn't matter. What matters is if it's a block or character device, the MAJOR number and the MINOR number. For block types of MAJOR 179, it's referring to a MMC device. For block/MMC (b 179). the minor number specifies the partition of the device. (I'm simplifying here - it's actually a masked value that includes a partition and device - and gets more interesting with > 16 partitions that require different majors)
So, you could (in theory) go into that script that works fine on the sgs3 and rename every occurrence of "mmcblk0p16" with "i_like_sex" and it'll still work on the sgs3 (even if you didn't like sex.)
Okay... so back to the script. Keep in mind that I'm basing EVERYTHING on that one script and haven't seen anything else related to this multi-boot thing. It'd probably help if someone gave me a link (I'm too lazy to search) to something that installs this multi-boot stuff.
Anyway, that script. I'm going to do something here for clarity. Instead of referencing the misleading "mmcblk0p13" and "mmcblk0p16" device node nodes, I'm just going to call them "extra13" and "extra16" (because they are NOT referencing partitions 13/16.)
So, in that script, extra13 is actually pointing to partition9 which (based on your information) is the SYSTEM partition (mmcblk0p9) and extra16 is actually pointing to partition12 which (again based on your info) is the USERDATA partition.
In other words, extra13 is pointing to what is normally mounted as "/system" and extra16 is pointing to what is normally mounted as "/data". However, at least for getting the dual boot stuff kick started, it's mounting extra16 in "/.secondrom" instead of "/data".
THAT should be enough information to get you going towards solving your issue.
Personally, I think that whoever decided to use mmcblk0p13 and mmcblk0p16 as fictional device node names on the sgs3 should be thumped in the head for either intentionally or unintentionally creating confusion. It might be due to one of the other dependencies of the dual booting system (what is "/sbin/choose_rom"?) that they were unwilling (or unable) to fix. It might also just be a way to try and make the stuff a pain to port. I don't know their intentions/motives.
I will offer this: If my explanation didn't make sense, you might want to take a few steps back and learn what all of it means before you keep going with the porting effort. Some of the concepts here are important to know, and some basic understanding of device nodes is important when mounting file systems.
Take care
Gary
garyd9 said:
Okay...
First, the mmc*boot? device nodes are for the boot loaders - please ignore those device nodes. Act like they don't exist. Don't mess with them. Ever. If there's one way to brick a samsung phone, it's by messing up the bootloaders. (Thanks to people like Adam Outler, you might still be able to recover, but only via hardware tinkering.)
So, let's back up and not be concerned about what the device nodes are named, but more concerned about what the device nodes are USED FOR (in relation to dual booting.) If I'm correct, you really aren't concerned about those device node names, but are more concerned about getting the dual boot working.
Is that init script in the OP unmolested? The reason I'm asking is that parts of it aren't making sense to me. For example, it's mounting the /system directory either via an image file OR from mmcblk0p13. However, you've stated that the SGS3 has the SYSTEM partition on mmcblk0p9. It almost appears as if you (or someone else) might have started editing the init script to make it work with a device that has the system partition on p13 (such as the note2.) That would also match with the fact that p16 on the Note2 is the data (userdata) partition...
Actually, that might be exactly what's going on here. The mknod parameters are creating device nodes to the existing p9/p12 partitions, but giving them different names that just happen to match the names used on the Note2...
You could, in theory, do something similar to what you suggested in your OP, but you'd need to do it a bit differently.... Instead of making device nodes with unused names and minors of 9/12, you'd want to use unused names and minors of 13 and 16. Let me explain...
Here is the code you said was in the sgs3 init script (along with comments followed by "//")
Code:
mknod /dev/block/mmcblk0p13 b 179 9 // creates a device node called p13 but is identical to p9
mknod /dev/block/mmcblk0p16 b 179 12 // creates a device node called p16 but is identical to p12
So, in your init script, /dev/block/mmcblk0p13 is referencing the EXACT SAME DEVICE as /dev/block/mmcblk0p9 (and the same for the created p16 device and the already existing p12 device.)
Wow, I really hope that not only am I making sense, but also that you are following me. I'm going to start rambling even more.
You kind of have to understand how device nodes work, etc. The NAME of the device node doesn't matter. What matters is if it's a block or character device, the MAJOR number and the MINOR number. For block types of MAJOR 179, it's referring to a MMC device. For block/MMC (b 179). the minor number specifies the partition of the device. (I'm simplifying here - it's actually a masked value that includes a partition and device - and gets more interesting with > 16 partitions that require different majors)
So, you could (in theory) go into that script that works fine on the sgs3 and rename every occurrence of "mmcblk0p16" with "i_like_sex" and it'll still work on the sgs3 (even if you didn't like sex.)
Okay... so back to the script. Keep in mind that I'm basing EVERYTHING on that one script and haven't seen anything else related to this multi-boot thing. It'd probably help if someone gave me a link (I'm too lazy to search) to something that installs this multi-boot stuff.
Anyway, that script. I'm going to do something here for clarity. Instead of referencing the misleading "mmcblk0p13" and "mmcblk0p16" device node nodes, I'm just going to call them "extra13" and "extra16" (because they are NOT referencing partitions 13/16.)
So, in that script, extra13 is actually pointing to partition9 which (based on your information) is the SYSTEM partition (mmcblk0p9) and extra16 is actually pointing to partition12 which (again based on your info) is the USERDATA partition.
In other words, extra13 is pointing to what is normally mounted as "/system" and extra16 is pointing to what is normally mounted as "/data". However, at least for getting the dual boot stuff kick started, it's mounting extra16 in "/.secondrom" instead of "/data".
THAT should be enough information to get you going towards solving your issue.
Personally, I think that whoever decided to use mmcblk0p13 and mmcblk0p16 as fictional device node names on the sgs3 should be thumped in the head for either intentionally or unintentionally creating confusion. It might be due to one of the other dependencies of the dual booting system (what is "/sbin/choose_rom"?) that they were unwilling (or unable) to fix. It might also just be a way to try and make the stuff a pain to port. I don't know their intentions/motives.
I will offer this: If my explanation didn't make sense, you might want to take a few steps back and learn what all of it means before you keep going with the porting effort. Some of the concepts here are important to know, and some basic understanding of device nodes is important when mounting file systems.
Take care
Gary
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Click to collapse
Hi,
Thanks for your reply, i think i uderstand what i need to do.
Just to be sure tho (i would rather not brick my phone if i dont have to ), is this what u think i should do?:
Change these lines:
Code:
mknod /dev/block/mmcblk0p13 b 179 9
mknod /dev/block/mmcblk0p16 b 179 12
To:
Code:
mknod /dev/block/extra13 b 179 13
mknod /dev/block/extra16 b 259 0
Cos if u look at the Minor and majors for the data partition (p16) u see that they have thoses ids:
Code:
[email protected]:/ # ls -l /dev/block/mmc*
brw------- root root 179, 0 2012-12-22 08:35 mmcblk0
brw------- root root 179, 1 2012-12-22 08:35 mmcblk0p1
brw-rw---- system radio 179, 10 2012-12-22 08:35 mmcblk0p10
brw-rw---- system radio 179, 11 2012-12-22 08:35 mmcblk0p11
brw------- root root 179, 12 2012-12-22 08:35 mmcblk0p12
[COLOR="Red"] brw------- root root 179, 13 2012-12-22 08:35 mmcblk0p13[/COLOR]
brw------- root root 179, 14 2012-12-22 08:35 mmcblk0p14
brw------- root root 179, 15 2012-12-22 08:35 mmcblk0p15
[COLOR="Red"] brw------- root root 259, 0 2012-12-22 08:35 mmcblk0p16[/COLOR]
brw------- root root 179, 2 2012-12-22 08:35 mmcblk0p2
brw------- root root 179, 3 2012-12-22 08:35 mmcblk0p3
brw-rw---- system radio 179, 4 2012-12-22 08:35 mmcblk0p4
brw-rw---- system radio 179, 5 2012-12-22 08:35 mmcblk0p5
brw-rw---- system radio 179, 6 2012-12-22 08:35 mmcblk0p6
brw-rw---- system root 179, 7 2012-12-22 08:35 mmcblk0p7
brw------- root root 179, 8 2012-12-22 08:35 mmcblk0p8
brw------- root root 179, 9 2012-12-22 08:35 mmcblk0p9
brw------- root root 179, 16 2012-12-22 08:35 mmcblk1
brw------- root root 179, 17 2012-12-22 08:35 mmcblk1p1
Does that look right to you?.
Here are the links to the dual boot kernel:
Here is the link to the ramfs i used to edit:
https://github.com/gokhanmoral/ramfs-sgs3
Here is the full kernel source code:
https://github.com/gokhanmoral/siyahkernel-sgs3
Here is the Completed kernel for the S3:
http://www.gokhanmoral.com/
the init scipt i sent was completely un-molested. it came from the source code provided by gokhanmoral, and it hadnt been edited or anything.
Thanks again for your help.
Cheers
Corey
It looks okay... obviously you'll have to change the script and perhaps some other stuff. I can't download the linked stuff right now (I'm on my phone) but will look more later.
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
garyd9 said:
It looks okay... obviously you'll have to change the script and perhaps some other stuff. I can't download the linked stuff right now (I'm on my phone) but will look more later.
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
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Click to collapse
Ok thanks. So do u mean I need to change the partition layout on all the scripts, and change any reference of thoses partitions mentioned earlier?. Or do u mean something else?.
Gokhan moral said I just needed to change the partition layout, and try it and see if it boots, and if it doesn't I can play around with the init file to try
And get it booting (he also said he would give me a copy of his modded recovery which has all the dual boot options if I get the dual boot booting via adb )
Thanks again
Cheers
Corey
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fishingfon said:
Ok thanks. So do u mean I need to change the partition layout on all the scripts, and change any reference of thoses partitions mentioned earlier?. Or do u mean something else?.
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You'd have to change the references to the device nodes in the scripts (and anything else that might use device nodes that reference sgs3 partitions.)
take care
Gary
garyd9 said:
You'd have to change the references to the device nodes in the scripts (and anything else that might use device nodes that reference sgs3 partitions.)
take care
Gary
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Click to collapse
Hi,
Yes I have already done that, although I will go thru all the scripts again to check I haven't missed one before I repack the ramdisk.
Thanks
Cheers
Corey
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Great news, I just flashed the kernel, and it didn't brick my phone .
The first rom booted fine, with the only bug being that the external sd doesn't work (but i know what i did wrong with that).
I have cloned the data to the second rom system img, but i am still figuring out how to boot in to the second rom, as the one boot user promt doesn't work without the custom dual boot recovery (i think)
Corey
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fishingfon said:
If I helped you, please hit Thanks..
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What would be more helpful is for you to post not only that you've had successes, but also to post the details of those successes to share with the community. What did you have to change with the scripts, what does the end result look like, etc.
It's annoying to see "I got it working" posts without details of HOW a person got it working. As well, the details will help the next person who tries to port it to another platform.
Take care
Gary
garyd9 said:
What would be more helpful is for you to post not only that you've had successes, but also to post the details of those successes to share with the community. What did you have to change with the scripts, what does the end result look like, etc.
It's annoying to see "I got it working" posts without details of HOW a person got it working. As well, the details will help the next person who tries to port it to another platform.
Take care
Gary
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Click to collapse
Hi,
I haven't finished getting it working yet, as only the first Rom is booting, i am still setting up the ext4 images ect for the second rom. i didn't really see much point in writing what u said till I had got the actual dual boot working. But when I have got the dual boot working I will write what u said.
Cheers
Corey
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All,
When I explore the device for the system image to pull using DD, I am not sure which one contains the fs to be mounted as /system. Basically trying to extract system.img from the stock Rom..
cat /proc/partitions
major minor #blocks name
179 0 30535680 mmcblk0
179 1 20480 mmcblk0p1
179 2 2048 mmcblk0p2
179 3 2048 mmcblk0p3
179 4 8192 mmcblk0p4
179 5 8192 mmcblk0p5
179 6 8192 mmcblk0p6
179 7 716800 mmcblk0p7
259 0 20480 mmcblk0p8
259 1 1433600 mmcblk0p9
259 2 27787247 mmcblk0p10
259 3 524288 mmcblk0p11
179 16 2048 mmcblk0boot1
179 8 2048 mmcblk0boot0
Code:
# ls -l /dev/block/platform/omap/omap_hsmmc.1/by-name