[Q] SD card partition format problem - Nexus S Q&A, Help & Troubleshooting

I attempted to partition the sd card with ext4, and was not able to get it to work. I then attempted to return the sd card to fat32 using but now Clockwork Recovery refuses to mount the sd card, failing with only 'Error mounting sdcard'
I've done this procedure before, and was able to use Windows XP to re-partition and format the sd card at which point Clockwork was able to mount it, but this time it's not working.
So my questions would be, what are the specific parameters of the partition is the phone looking for? Should it be MBR, GUID? Is there some sort of option during the partitioning or format I'm missing? What about volume label?
I've checked fstab and recovery.fstab and they both list vfat as the partition type. At a loss here, would hate to have a bricked phone simply because I can't take the darned sd card out.

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please help sd card problems

ok here is my situation i am running a rooted g1 with amon ra 1.5 recovery and cyanogen 4.2.12.2, i used the partitioning function from the recovery options to format my sd card , now that i have the fat32 , ext3, and swap partition i was able to move my cache and apps to the sd and everything is working great, the problem i am now having is i cannot access the fat32 partition , the mount/unmount option is faded i can see how much space is on it but i cannot put any of my files back on the card it also doesnt give me the option to mount the sd card anymore when i plug it into my computers i have tried it on my mac, windows xp laptop and my asus eee linux laptop
any help would be great thanks
You have probably corrupted the partition table somehow.
If you don't have anything precious on the card, try to wipe it and start over.
But since i know life i'm almost sure you have files there that you wish not to lose.
Tell me, did you format all the partition after creating them?
Did you unmount/re-mount the partitions after creating/formating and BEFORE you copied any files to them?
If the answer to any of the above question is "no", you've probably screwed up.
Regards,
Bushman
No I partitioned the card using amon ra recovery 1.5 it has the option to do the ext2, Swap and the fat 32 partitions all at once I did 96m swap 512ext2 and then upgraded it up to ext4 and left the remaining for fat32 , when I save files it does put them in the fat32 patitition I believe since my ext4 partition does not loose any space and I already ftp'd most of my files back to the card that would easily exceed the 512m partition I just can't get the mount option to come up now when I plug it into my computer other then that everything works perfectly
open console and type "dmesg", then insert the card and type it again, compare the few last lines, if there's anything diferent saying about MMC/SD, post it here (only the card related stuff)
Good luck,
Bushman

[Q] Can't figure out SD Card Partitioning with Link2SD

I'm just wondering if anyone else has been able to make a second partition on their O3D/Thrill. I'm not sure if this problem I'm having is a limitation to the phone, or rom.
I'm using an LG Thrill with v20c baseband, Prometheus V1.4 rom.
I'm following this guide here:
http://forum.xda-developers.com/wiki/SD_card_partitioning
I have a 32gb micro sd. I've made my 2nd partition 10gb as ext2. When I put it in the phone it reads it, says it's ready to read/write media (in notifications bar). I then go to link2sd, it automatically asks me if the 2nd partition is ext2, ext3, ext4, or fat32/fat16. I tried ext2 and it says:
"Mount script cannot be created. mount: mounting /dev/block/vold/179:18 on /data/sdext2 failed: Invalid argument.
I then put it back into my computer and formated to fat32, same thing, then ext4, same thing. Each time I put it back into my computer Gparted sees the 2nd partition as "unknown", so I believe android is changing the partition type to something unrecognizable.
Well, being I haven't got a reply yet, I'll ask this,
Has anyone with an Optimus 3D partitioned their SD card?
Oh i did & got it worked but I stopped using the link2sd partitioning my sdcard, because somethings you should know. Well first, the sd has to be fat32 & when asking about the 2nd partition, chose fat32 and then reboot the phone. I tried ext2 or ext whatever just never work. After reboot and link2sd ask the same thing again, just pick the fat32 partion and reboot again. It worked for me after 3 reboot, strange don't know why.
Lastly, just let you know the 1st partition of the SD card won't show on your phone because theres already internal SD and external_SD folder only show the 2nd partition of SD card. But the 2nd partition won't show on your pc to transfer files, if you know what i mean. Like I wanted to use the 1st partition for music/movies and 2nd for apps (link2sd) but you have to partition the SDcard for the link2sd to work. So the external_SD folder is for 2nd partition, I looked everywhere for the movie on the 1st partition but never found it or maybe I should try root explorer...well I don't know maybe there's someone can help us out about the 1st partition OR maybe just my O3D SORRY for the long reading! lol

Formatting Question?

Hi all,
I have been reading about an issue that I have: 'android.process.media' keeps stopping.
One of the suggestions is that there maybe a corrupted file on your external sd card.
The fix is to either delete the file; good luck trying to find which file. or to reformat the sd card.
Since I have the keyboard dock and several 32gb microSD cards. I plan on copying all my files to the other card and then formatting the card in question.
However, it seems on the Asus tablet, I am not given the format option. I had it on my Samsung phone before the upgrade to ICS.
But one thing I wanted to do after some other reading is to format the card the same file system that is used on the internal memory.
If I have my facts correct, the internal memory is formatted as 'ext' and external SD cards get formatted as 'fat' (or is that fat32).
I think it's formatted as fat, is for compatibility with your PC.
However, the article, said that 'ext' is much more secure and less prone to corruption.
So is there anyway to format the external SD card in this 'ext' file system and how would one do that process?
Thanks!
Rob
You would need to do it in linux or find a windows program that could do it, as ext is not supported in windows. Im not sure the microsd will work right in the tablet formated as ext and your windows desktop wont be able to access .
Ok, I read in another thread, they suggested to put the microsd card in the phone and format from there.
I did do that.
And I have another question, my phone is rooted and it contains CWM.
I noticed in CWM, that you can fomat from there.
There are options to format areas, like /system /cache and the one I am interested in is /sdcard.
My question is this, is this /sdcard the external micro SD card or is it simply the partition /sdcard which is Samsung's internal memory. I don't want to take a change and format the internal SD card.
I think once formatted the external SD card, but I was on a different version of CWM, I have a different one after the ICS upgrade that was recommended by someone helping me do the ICS upgrade.
Anyway, thanks in advance!
Rob
Whoops almost forgot, there is thread on xda about formatting memory in ext4. I would like to try that and see if the Asus tablet can read that if I get to format the external card in ext4 Still looking for a Windows program that will format in that mode.
/sdcard is internal. /Removable is external.
I would be surprised if you can find a Windows program that reads, let alone writes, any type of ext filesystem (and forget about anything less mainstream like JFS or ReiserFS). Microsoft only made Windows compatible with their own filesystems, FAT32 and NTFS.

TWRP won't read External SD Card or /mnt

I've been rooted for a while without any issues, until recently I'm not sure what happened but suddenly TWRP won't show the /mnt folder or be able to access anything on my SD Card, I've tried mounting and selecting the SD Card in TWRP settings but it displays 0MB and won't select it. All I see is my Internal Storage files, which means I can't flash anything easily. I don't know when it happened but it was working about a week ago. I formatted my SD Card as ext4 in TWRP itself and also tried NTFS on Windows.
NOTE: I can view the SD Card in Solid Explorer and on my computer, TWRP is the only one that can't mount/read any SD Card files or even recognize it.
Is there any way I can work around this without formatting the SD Card?

My SD card went dead- has Ext4 and FAT32 partitions on it

Hi,
My SD card suddenly went unmountable. My phone restarted automatically and hasn't been able to mount the card. It is not recognizable in Windows too. I just see a grayed out drive that has 0MB.
I'm using Apps2SD on my phone and I had to partition my SD card with one Ext4 partition and on FAT32.
The thing is that because the first partition is Ext4, Windows cannot see the second FAT32 partition.
How can I check if my SD card really went dead or is it a matter of corrupted file system?
What program can I use to scan and check Linux partitions on SD card?

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