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How Do I Do an EXT4 Wipe?

i got virtuous unity 2.37 and want to install 2.39. its suggested i do a ext4 wipe before nstalling 2.39. i want to make sure i'm doing this right.
so, to do a full ext4 wipe, i must boot into recovery and then wipe all data, cache, then go to advance and wipe dalvik? is this correct?

Maybe you must go in Wipe / Format menu,then format sd-ext.

Go to mount and storage, click format sd-ext and click yes. Your ext4 partition is now wiped.

itachi1706 said:
Go to mount and storage, click format sd-ext and click yes. Your ext4 partition is now wiped.
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hi itachi.. does your advice regard wiping the sd card?
also, someone suggested that an ext4 wipe involves going to Wipe/Format and selecting wipe data/factory reset, wipe dalvik cache, format system, format data, format cache and format boot. is this true?

trapzz said:
hi itachi.. does your advice regard wiping the sd card?
also, someone suggested that an ext4 wipe involves going to Wipe/Format and selecting wipe data/factory reset, wipe dalvik cache, format system, format data, format cache and format boot. is this true?
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It does not affect the FAT partition of the SD card. Only the Ext partition. And by wiping data, dalvik, formating system, data, cache and boot, you are literally doing a full wipe of the phone which people normally do when they change from 1 Rom to another.

itachi1706 said:
It does not affect the FAT partition of the SD card. Only the Ext partition. And by wiping data, dalvik, formating system, data, cache and boot, you are literally doing a full wipe of the phone which people normally do when they change from 1 Rom to another.
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thats exactly why im doing a full wipe.. to upgrade my rom to a higher version. but your way of wiping data seems like it involves wiping data from the sd card, which is risky and unnecessary when installing/upgrading a rom. and it can wipe out the rom on the sd card that you want to install anyway. so then whats the point'?

trapzz said:
thats exactly why im doing a full wipe.. to upgrade my rom to a higher version. but your way of wiping data seems like it involves wiping data from the sd card, which is risky and unnecessary when installing/upgrading a rom. and it can wipe out the rom on the sd card that you want to install anyway. so then whats the point'?
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I don't mean changing to a higher version, I mean changing Rom (like from cyanogen to miui) . If you are upgrading to a higher version you do not need to wipe data. All you need to do is just wipe cache and dalvik, boot and system too if you want. This way you will get updated to the latest version while still retaining your application data.
And yes, technically you do wipe the sdcard, but only the EXT partition, which is where your apps are placed in if you use A2SD+. Your FAT partition, which is the one recognised by the computer and where you put all your data in, is not affected. Hence it will not wipe out the Rom you are trying to install on the sdcard.
Sent from my HTC Original Desire using Tapatalk

Questions about "wiping" data

Ok, with all of the talk about making sure folks do a full wipe before installing ICS, I would like to get some clarification on all of the different wiping methods and which is the best way...
I know of these ways:
1. Via custom recovery - you can wipe data, system, cache, etc.. individually.
2. Via holding Power+VolumeDown until bootloader text appears,, then wait until menu appears and select the Wipe Data option (instead of the cold boot option).
3. Via AARD SuperWipe full script
And then of course, there is the "Reset to factory defaults" in the OS itself...
Which is the best to use? I would assume the AARD SuperWipe full would be the most thorough as it recreates the partitions and everything (instead of just formatting them).
FOr users that have the ability, would an NVFlash of the OS be "more thorough" than CWM method?
Opinions/Experiences?
Thanks!

Don't use super wipe script. A lot of people reported having problems of some ROMs not flashing correctly after using it. There is no reason to use the "full" version anyway. It formats the /media partition(your internal storage partition) which you don't want to nor need to format.
Wipe Data in your #2 does pretty much the same thing as "Reset to factory defaults". They both wipe /data and /cache but do not touch /system.
The most thorough way of wiping that I use is via CWM.
I do all of this within CWM if I want to ensure a clean install of a new ROM and it has never failed.
- wipe data/factory reset
- wipe cache partition
- advanced / Wipe Dalvik Cache
- Mounts and Storage / format /system
I am not sure how NVFlashing a ROM does a clean install? As far as I know, it just flashes whatever it's told to flash. It wouldn't even touch /data if you were just flashing a ROM with it.

horndroid said:
Don't use super wipe script. A lot of people reported having problems of some ROMs not flashing correctly after using it. There is no reason to use the "full" version anyway. It formats the /media partition(your internal storage partition) which you don't want to nor need to format.
Wipe Data in your #2 does pretty much the same thing as "Reset to factory defaults". They both wipe /data and /cache but do not touch /system.
The most thorough way of wiping that I use is via CWM.
I do all of this within CWM if I want to ensure a clean install of a new ROM and it has never failed.
- wipe data/factory reset
- wipe cache partition
- advanced / Wipe Dalvik Cache
- Mounts and Storage / format /system
I am not sure how NVFlashing a ROM does a clean install? As far as I know, it just flashes whatever it's told to flash. It wouldn't even touch /data if you were just flashing a ROM with it.
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I've tried ALL of the above methods - all with the exact same results, to be honest...
Even if I revert back to honeycomb (even after a full wipe), I STILL exhibit the reboot issues (it's not just me - look around). This was NOT happening before with the exact same version of Revolver. This tells me that there is still yet something else that was changed during the ICS updates. We know the bootloader was updated - i'm now testing ICS with the old bootloader.
Other than the bootloader, what else could have changed?? Unless they upgraded the firmware on a particular device during the ICS update (wifi chip, bluetooth chip, etc). Other than that, I just can't come up with an explanation as to why Honeycomb won't even run properly anymore!
Sent from my Transformer TF101 using Tapatalk

horndroid said:
I am not sure how NVFlashing a ROM does a clean install? As far as I know, it just flashes whatever it's told to flash. It wouldn't even touch /data if you were just flashing a ROM with it.
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If you use the --create flag, nvflash will format ALL the partitions and then flash them. If you use the --download flag, it will just overwrite the partitions you send it.
That being said, I agree at your wiping method is more than enough. Most times, I don't bother wiping, especially data.
sent from my cyanogen(mod) vision

CROMI data2sd random restarts

I wipe cache, dalvik, factory, system.
Installed CROMI 3.4.1 then 3.4.4 with stock kernel. Power on for half an hour.
Sdcard formatted as:
1 partition unformatted 8mb primary
2 partition Ext4 rest of card primary active
In recovery i flash cromi-3.4.x-data2sd.zip and then recovery mod (mount-data2sd.zip). After reboot data2sd is working but if I want to copy from my pc to transformer some movies i have restart. Every time. Same when try to copy some data from internal memory to sdcard.
Then i try to install CROMI like at first but then flash that v4 kernel only. Tablet starting with data2sd on, but cant see internal memory and restarts continuos.
Sholud i try other kernel or i do something wrong?

Hi!
You should flash this kernel: http://forum.xda-developers.com/showthread.php?t=1892326
There isn't another way!

Hazard17 said:
Hi!
You should flash this kernel: http://forum.xda-developers.com/showthread.php?t=1892326
There isn't another way!
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Click to collapse
with this kernel data2d dosen't work on my CROMI 3.4.4

ok. I don't know another kernel which works with data2sd on TF300T. Try install Data2SD with unter's kernel by TWRP without wipe system. Only wipe Data, cache & dalivik and Factory Reset. Data2sd moves only /data, not system.

[Q] Internal Data Wipe pre Rom Flash

I am curious about doing an internal data wipe before flashing a new Rom. I am using TWRP 2.5.5. I am on the 4.2 bootloader and am about to update to the new CROMi. I know that doing a factory reset wipes dalvik, cache, and system, am I wrong in thinking this still leaves some stuff left over on your internal SD? If it does, I want to format all of it. I have the 4.2.1 bootloader, the CROMi rom, and a 4.2.1 stock nandroid backup I made in TWRP all saved on my external SD. What I dont understand is if I format all the data on the internal, how will the tablet know what to do when I boot it back up? Will TWRP be lost? If it does boot back up, what will it boot back up to? I just dont quite understand this internal SD formatting thing so well, so I am asking for some help so I can avoid doing something stupid. I know this is possible because I have read about other people doing it in the CROMi thread, I just want to make sure I am not missing anything

Your tablet has the following partitions (and some others which are irrelevant for this discussion):
- Bootloader
- Recovery
- Linux kernel
- Cache partition (/cache)
- System partition (/system)
- Data partition (/data)
The internal SD card is an emulation that uses /data/media as storage. So if you format /data, that removes all user data including the contents of your "internal SD card" emulation. I don't know why the normal "factory reset" somehow deletes only the rest of /data excluding /data/media. It may be convenient but not what I would understand as "factory reset".
If you format /system (which is not touched by a factory reset), you won't be able to boot Android unless you install a new ROM before you reboot. You don't need to format /system, it's done by the CROMI installer anyway.

_that said:
Your tablet has the following partitions (and some others which are irrelevant for this discussion):
- Bootloader
- Recovery
- Linux kernel
- Cache partition (/cache)
- System partition (/system)
- Data partition (/data)
The internal SD card is an emulation that uses /data/media as storage. So if you format /data, that removes all user data including the contents of your "internal SD card" emulation. I don't know why the normal "factory reset" somehow deletes only the rest of /data excluding /data/media. It may be convenient but not what I would understand as "factory reset".
If you format /system (which is not touched by a factory reset), you won't be able to boot Android unless you install a new ROM before you reboot. You don't need to format /system, it's done by the CROMI installer anyway.
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Aweomse! Thanks for helping me understand that a little better. My first ROM was CROMi 3.4.4 and I researched all this for about an entire week before I started this but I never fully understand the difference with formatting internal SD and factory reset. I have always installed the new ROM before rebooting anyway but it is nice to know CROMi does the system wipe for you. Didnt know that. If I were to do a complete wipe, would I need to install the most recent 4.2 bootloader prior to installing CROMi so it is there for CROMi to build on?
Oh, and btw your Kernels for CROMi are outstanding.

Turin87 said:
My first ROM was CROMi 3.4.4 and I researched all this for about an entire week before I started this but I never fully understand the difference with formatting internal SD and factory reset.
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There is even official TWRP documentation about wiping: http://teamw.in/whattowipe
(I personally have never used any of the wipe options so far, so I am just repeating what I read about it)
Turin87 said:
If I were to do a complete wipe, would I need to install the most recent 4.2 bootloader prior to installing CROMi so it is there for CROMi to build on?
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Click to collapse
There is no "wipe bootloader" option, so there is no need to reinstall the bootloader. Wiping the bootloader would also brick your device and you would need nvflash to recover.

_that said:
There is even official TWRP documentation about wiping:
(I personally have never used any of the wipe options so far, so I am just repeating what I read about it)
There is no "wipe bootloader" option, so there is no need to reinstall the bootloader. Wiping the bootloader would also brick your device and you would need nvflash to recover.
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Click to collapse
Good to know. Glad I didnt attempt that. My firmware version was .30 so nvflash was not an option for me. Thanks again for your help.

[Q] ROM change, Full wipe clarification

Am currently on Crombi KK, looking to try out the Lollipop 5.0.2 Zombi-Pop Beta. I know just enough to be dangerous. Installed Crombi-KK to internal, then reinstalled to run ROM2sd a while back, SDcard set up in GParted. Have TWRP 2.8.4.0, just want some clarification on how and what to wipe. ROM thread states to do a full wipe, but I've never been totally sure on what constitutes a full wipe from recovery. From Wipe option in TWRP, there is Advanced Wipe and Format Data. Do I chose one or another or both? In Advanced Wipe, there are 6 partitions:
Dalvik Cache
System
Cache
Data
Internal Storage
Micro SDcard
What one(s) do I select? Since I'm running ROM2sd, do I need to run ROM2sd zip first?
TIA

OneFore9 said:
Am currently on Crombi KK, looking to try out the Lollipop 5.0.2 Zombi-Pop Beta. I know just enough to be dangerous. Installed Crombi-KK to internal, then reinstalled to run ROM2sd a while back, SDcard set up in GParted. Have TWRP 2.8.4.0, just want some clarification on how and what to wipe. ROM thread states to do a full wipe, but I've never been totally sure on what constitutes a full wipe from recovery. From Wipe option in TWRP, there is Advanced Wipe and Format Data. Do I chose one or another or both? In Advanced Wipe, there are 6 partitions:
Dalvik Cache
System
Cache
Data
Internal Storage
Micro SDcard
What one(s) do I select? Since I'm running ROM2sd, do I need to run ROM2sd zip first?
TIA
Click to expand...
Click to collapse
A full wipe is a wipe of data, cache and Dalvik. In most cases that is sufficient moving to a different rom base and the default in TWRP under the Wipe menu.
If you encounter weird problems, format /data/ (and don't interrupt it. Takes 90 minutes or so!)
There are only very specific scenarios where wiping /system would make sense. /system gets formatted anyway during rom installation - no need to wipe it.
Internal storage - if you want to get rid of everything but do not want to format /data/. Wiping data wipes everything except /data/media/ in TWRP (that's where your personal files live). Wiping Internal Storage wipes everything including /data/media/
Micro SD - wipes your microSD or - in the case of data2sd/rom2sd - the fat32 partition thereof.
If you want to wipe/format your rom2sd /data or /system partitions, yes - you have to flash rom2sd1.zip first