Hello, fellow gTablet users!
I'm kinda newbie here, so first of all my apologies to everyone if that was already asked, 'cause I did some research on the matter and couldn't find all the necessary info for solving my particular issue.
Ok, so here's the deal. I was using my gTab for about half-year now. When I received it, I installed VeganTab-7 Ginger Edition on it (thanks for the devs - very nice ROM!) and it worked flawlessly until yesterday. But then something not good happened and the tablet stopped booting. Now it starts from birds screen, goes on to G-Tabdevs screen, after which VeganTab GingerEd boot screen appears, it has flashing letters for a couple of seconds and then tablet goes black and tries to boot again. I guess it's a boot loop so it's kinda soft brick and I'll have to do wipe data/factory reset through CWM to solve the issue. So this isn't the biggest problem - I've already found all the instructions.
The real problem is that I didn't make backup of my data (guilty!), but I don't want to lose some of it, especially the browser data. I was using Opera Mobile, so I guess that its data should be on /data partition. So I'll need an advice on how I can dump the necessary data before doing factory reset!
I've already tried connecting to desktop, using guide from this (http://forum.xda-developers.com/showthread.php?t=1010943) thread (third method from it), but it didn't work, at least on my Win7 Pro x64 SP1: the tablet shows as removable disk, but I can't access it. I tried to mount /data or /sdcard partitions through CWM recovery menu, but it tells me that it can't find /dev/block/... - I guess that's block device, associated with those partitions. So what are my best options of backuping data?
And the last question: I'll probably install some other ROM just to try something different, but unfortunately I don't remember what loader I have. I'm nearly sure that I installed VeganTab for 1.1, 'cause I did it back in May 2011 and there wasn't one available for 1.2 yet. But just to make sure: how can I find my loader version before I do reset? Or maybe I just have to do the reset and look for it when back on stock ROM?
Seriously, guys, doesn't anybody know how to solve these problems?
Boot into CWM first, then try mounting both /data and /sdcard using the CWM menu. Note down the exact error message displayed in each case. Then connect the USB cable and run these ADB commands on your PC:
Code:
C:\> [B]adb shell dmesg >dmesg.txt[/B]
C:\> [B]adb shell fdisk -l /dev/block/mmcblk3 > fdisk.txt[/B]
C:\> [B]adb shell fdisk -l /dev/block/mmcblk2 >> fdisk.txt[/B]
Post the error messages and those 2 .txt files here.
Thank you for reply, rajeevvp.
When I'm trying to mount /data and /sdcard it says respectively:
Code:
E:Can't mount /dev/block/mmcblk3p2
(No such file or directory)
Error mounting DATA:!
E:Can't mount /dev/block/mmcblk3p1 (or /dev/block/mmcblk2p1)
(No such file or directory)
Error mounting SDCARD:!
Unfortunately I didn't have ADB installed. Now I'm trying to use the guide from here: http://forum.xda-developers.com/showthread.php?t=902860, but fail on step 4, cause there is nothing like "Nvidia harmony" appearing under other devices in my dev manager, just "Nvidia Tegra 2 USB Device" under Disk Drives and "USB Mass Storage Device" under Universal Serial Bus Controllers. I guess these devices are gTablet's internal memory presented as disk drive...
I'll try to install ADB and then write back how it worked.
Interesting error messages. Now I really have to see those text files.
If you're having problems installing ADB on Windows, try using Linux.
Ok, thanks you very much! I'll try that, but unfortunately tomorrow, as it's already too late here.
Btw, I read your post about linux - you're suggesting Knoppix Live CD there. Is it mandatory to use it? I mean I already have PartedMagic live CD burned, maybe I could use it instead...
anary said:
I mean I already have PartedMagic live CD burned, maybe I could use it instead...
Click to expand...
Click to collapse
If sudo and adb work, then no problem.
rajeevvp said:
Boot into CWM first, then try mounting both /data and /sdcard using the CWM menu. Note down the exact error message displayed in each case. Then connect the USB cable and run these ADB commands on your PC:
Code:
C:\> [B]adb shell dmesg >dmesg.txt[/B]
C:\> [B]adb shell fdisk -l /dev/block/mmcblk3 > fdisk.txt[/B]
C:\> [B]adb shell fdisk -l /dev/block/mmcblk2 >> fdisk.txt[/B]
Post the error messages and those 2 .txt files here.
Click to expand...
Click to collapse
Ok, I finally managed to do it. Sorry for the delay.
The files are attached. Did everything how you told me.
Actually I don't think that I understand too much in Android inner mechanics But having looked through these files, I thought that inner sdcard device (mmcblk3) doesn't seem to produce any strange behavior...
Btw, thanks a lot for your advice about using Knoppix - it's really very easy and handy!
anary said:
But having looked through these files, I thought that inner sdcard device (mmcblk3) doesn't seem to produce any strange behavior...
Click to expand...
Click to collapse
You have lost your /data partition altogether. You are supposed to have 2 partitions on that internal SD card: a 14GB FAT32 partition and a 2GB ext3 partition. You only have a single FAT32 partition spanning the entire SD card now.
I may be able to help you get both partitions back if you give me these details:
1. How and when did this happen?
2. Current ROM.
3. Current version of CWM.
4. Did you try to repartition the (internal) SD card recently?
5. Have you ever repartitioned the internal SD card? If yes, then using which version of CWM?
6. After you noticed the problem what steps did you take to fix the problem?
Yeah, I remember I was curious where it stores OS's kernel if all it has is FAT32 partition - now I get it...
Ok, here are the details:
1. I don't really know what has happened, but I guess that it happened when I tried to use tablet like cardreader for microsd card. During that I sort of formatted external sd - maybe that actually was internal memory? I checked through file manager though, and all the files seemed intact...
2. VeganTab GingerEd from this thread: http://forum.xda-developers.com/showthread.php?t=1031250. I'm pretty sure that I didn't install anything except for it.
3. Don't know. But it says ClockworkMod Recovery v2.5.1.1-bekit-0.8 in recovery menu, so I guess its version is maybe 0.8.
4. No I didn't, at least intentionally.
5. I think I did it just once, when installing the ROM. I'm pretty much sure that I used this instructions for repartitioning: http://viewsonic-gtablet-for-dummies.webs.com/repartition.htm (not exactly this, but I did the same as it's written there). To install the ROM I used the instructions from the ROM thread, mentioned above. I didn't whant to do a lot of modding, just wanted the device to work at least better than with stock ROM, so didn't try to change any other low-level things.
6. I just tried to mount partitions through CWM recovery and I tried wiping out cache partition and Dalvik cache. Nothing else.
anary said:
Yeah, I remember I was curious where it stores OS's kernel if all it has is FAT32 partition - now I get it...
Click to expand...
Click to collapse
The OS kernel is not stored on the SD cards. They're stored on a "boot" partition on the NAND flash. And, if the OS was messed up you would get hung up on the initial splash screen (the one with the 3 birds)--you wouldn't go into a boot loop.
1. I don't really know what has happened, but I guess that it happened when I tried to use tablet like cardreader for microsd card. During that I sort of formatted external sd - maybe that actually was internal memory?
Click to expand...
Click to collapse
That's what caused this problem. CWM-2.5.1.1-bekit-0.8 does not work on the external SD card (but, CWM-2.5.1.3 and CWM-4.0.1.5 do).
Did you format the internal SD card using CWM?
I checked through file manager though, and all the files seemed intact...
Click to expand...
Click to collapse
Files where? The internal SD card or the external one? And, how did you check this? After formatting the internal SD card, the very next boot into the ROM would've put you into a boot-loop because the /data partition is missing.
I think I may be able to get stuff from /data, but, everything on /sdcard is most likely gone. (Actually, the files are most likely all there, but, without direct access to the tablet, it's very difficult to get the retrieve any of them.) Just don't touch the tablet until I've figured out the commands you will have to use.
That's what caused this problem. CWM-2.5.1.1-bekit-0.8 does not work on the external SD card (but, CWM-2.5.1.3 and CWM-4.0.1.5 do).
Did you format the internal SD card using CWM?
Click to expand...
Click to collapse
No, I was going to format external SD card and I tried to do it through Android (or maybe VeganTab) menu. I think that doing this, I could accidentally format internal SD, but I'm not sure this could be done from within the OS. During the same logon session I checked files on internal SD with file manager and all of them were where they should have been. So I thought that all was ok. But when I rebooted next time, it wasn't booting... That's why I told you that maybe it was because of formatting.
And just to be clear: I didn't do anything using CWM after it stopped booting, apart from wiping system and Dalvik caches.
Do you have a large capacity micro SD card (anything larger than the maximum amount of data that's currently on the internal SD card) that you can use to save retrieved data into?
rajeevvp said:
Do you have a large capacity micro SD card (anything larger than the maximum amount of data that's currently on the internal SD card) that you can use to save retrieved data into?
Click to expand...
Click to collapse
Yep. Won't be any problem.
anary said:
Yep. Won't be any problem.
Click to expand...
Click to collapse
OK. Format that micro SD to contain a single DOS partition; then we'll proceed.
rajeevvp said:
OK. Format that micro SD to contain a single DOS partition; then we'll proceed.
Click to expand...
Click to collapse
Ok. That's done.
Boot into CWM, go into the "mounts and storage" menu, unmount all mounted partitions, connect the USB cable, and run these commands using ADB--do not back out of that "mounts and storage" menu while we're fixing this. We're trying to see if the data on the current /sdcard partition can be retrieved.
Code:
$ [B]adb shell[/B]
~ # [B]mount -r /dev/block/mmcblk3p1 /sdcard[/B]
~ # [B]ls -l /sdcard[/B]
If the ls listing looks OK, then we force a filesystem check before copying the data to the external micro SD card:
Code:
~ # [B]mount -r /system[/B]
~ # [B]umount /sdcard[/B]
~ # [B]/system/bin/fsck_msdos -f -y /dev/block/mmcblk3p1[/B]
If the listing doesn't look OK, then the data on /sdcard is lost.
Post the exact output of each command.
Ok, mount says this:
Code:
mount: mounting /dev/block/mmcblk3p1 on /sdcard failed: Invalid argument
and ls after that gives no output - I think it shouldn't give any, 'cause I didn't mount anything...
Does this mean I'm screwed?
Try this mount command:
Code:
~ # [B]mount -r -t vfat /dev/block/mmcblk3p1 /sdcard[/B]
The same result.
Hi Forum!,
My player is really doomed i think.
Hope some one know a fix for this.
I tried different (stock)roms and bootloaders.
With no luck, it only boots up into recovery mode. (CWM-Based Recovery v5.0.2.7)
With these errors:
Code:
E: Can't mount /cache/recovery/command
E: Can't mount /cache/recovery/log
E: Can't open /cache/recovery/log
E: Can't mount /cache/recovery/last_log
E: Can't open /cache/recovery/last_log
When i try to view the partition table its saying that there is no table.
Code:
~ # fdisk /dev/block/mmcblk0 -l
fdisk /dev/block/mmcblk0 -l
Disk /dev/block/mmcblk0: 7944 MB, 7944011776 bytes
4 heads, 16 sectors/track, 242432 cylinders
Units = cylinders of 64 * 512 = 32768 bytes
Disk /dev/block/mmcblk0 doesn't contain a valid partition table
And when i try to open it, its creating a standard dos table.
Code:
fdisk /dev/block/mmcblk0
Device contains neither a valid DOS partition table, nor Sun, SGI, OSF or GPT di
sklabel
Building a new DOS disklabel. Changes will remain in memory only,
until you decide to write them. After that the previous content
won't be recoverable.
The number of cylinders for this disk is set to 242432.
There is nothing wrong with that, but this is larger than 1024,
and could in certain setups cause problems with:
1) software that runs at boot time (e.g., old versions of LILO)
2) booting and partitioning software from other OSs
(e.g., DOS FDISK, OS/2 FDISK)
Command (m for help):
But when i try to create a partition i can only make 4 Partitions.
So i can't create enough partitions to Flash the device properly.
Code:
Command (m for help): n
n
Command action
e extended
p primary partition (1-4)
p
p
Partition number (1-4):
Does someone know how to fix this? or perhaps help me the right way.
Thanks
Interesting, I had the exact same problem with the errors on recovery menu about the cache. I read wiping data and cache sometimes fixes it, but nothing worked. I flashed a backup rom, but nothing changed. I ended up sending it into Samsung for repair; well worth the 3 bucks for shipping!
sjefket said:
...
p primary partition (1-4)
Click to expand...
Click to collapse
I haven't had this problem before but it seems, from the output that you posted, that you may be limited to 4 primary partitions. You may be able to have several more extended partitions. It's been awhile since I've done any linux partitioning but it seems like that how I always did it. You have a primary partition that is chopped up by extended partitions...
Thanks for the quick response guys!
I bought the SGP here in a store and they say that this is no warranty becouse its a update mistake .
Also contacted Samsung, and there telling me that the device is from outside Europe and they wont replace it.
I'm a little bit further now.. Because i chose extended partition in the options.. Then it is possible to make more than 4 partitions! (thanks! Meticulus for the good answer/tip)
So i manually created a good partition table and flashed the device.. (without re-partition offcourse)
Still no luck
I look at Fdisk.. and unfortunately the table is screwed up.
Hmm...
You know you haven't exactly told us which player you have? You know the 4.0 and 5.0 are very different in their partitioning...
You are right! sorry!
I have the Galaxy Wifi 5.0 8 GB YP-G70CB/XEH
Thanks for asking.
Well, you've got an international 5.0 and I know that you've seen this already but I would suggest that you have a look at rumirand's post(3 one down) here: http://forum.xda-developers.com/showthread.php?t=1468213
Remember that "w" writes changes (I think).
I had the same problem, I think it was caused by flashing something while having repartition checked, even if it was the same pit file I just flashed. I had to reflash everything. You might want to look in your .tar.md5 if those files are included:
SBL
BOOT
CACHE
DBDATAFS
PARAM
zimage
factoryfs
Yes that's right, I used that post as an example for my partition table.
And i write it to my player with W.
As a test.. i turn it off and on to see it will save after a Reboot and it did
So the eMMC is not fried?
Ben456, thanks for replying!
I have a rom with everything in it, but when i use that rom.. it only show's the samsung logo and it would not start Recovery.
Do you, or some one could post me a link with a Custom or Stock rom that has everything in it? I would really appreciate it
I have search the forum off course. And tried differend roms. But didn't found a right one (with more than zimage factoryfs) that is for the International.
I want to try to copy the files manually to each partition.
But i dont know which file belongs to which partition.
So odin don't mess up things
Maybe anyone knows this? or have a other suggestion?
Thanks!
Me too
Ben456 said:
I had the same problem, I think it was caused by flashing something while having repartition checked, even if it was the same pit file I just flashed. I had to reflash everything. You might want to look in your .tar.md5 if those files are included:
SBL
BOOT
CACHE
DBDATAFS
PARAM
zimage
factoryfs
Click to expand...
Click to collapse
I think I might be having the problem too. Do you think a factxor image will work? Or I need to take specialized steps.
Hello all,
I'm hoping someone can help me with this. Long story short, I've bricked my Prime. I was running TWRP recovery (AndroWook, so 2.6.something?) and KatKiss v30 when things went south... but unbricking is for another day.
I'm more interested in getting some data that didn't make it into my last backup off the /sdcard. I don't have access to the device itself (adb or fastboot, haven't tried APX yet), but I did managed to take an image of /dev/block/mmcblk0p8 via the dd command.
The problem is I can't mount it as a loop device in Linux. The problem that started all this was that KatKiss wouldn't boot... the output of "fdisk -l /dev/block/mmcblk0" suggested that its partition table was corrupted or gone.
Various suggestions on XDA and elsewhere (xmount, kpartx, etc.) haven't allowed me to mount this backup image... I'm wondering if the missing partition table isn't the issue.
[email protected]:~/prime_backup_microsdcard_32G_20151227$ sudo mount -t auto -o
loop tf201-mmcblk0p8.img /mnt
NTFS signature is missing.
Failed to mount '/dev/loop3': Invalid argument
The device '/dev/loop3' doesn't seem to have a valid NTFS.
Maybe the wrong device is used? Or the whole disk instead of a
partition (e.g. /dev/sda, not /dev/sda1)? Or the other way around?
So my thought is to try the following:
1. Create a virtual HD of >27.GB (the size of the backup image).
2. Create a partition of the exact size/dimensions as the backup I have, and ensure I'm able to mount it.
3. Restore the backup to this partition using dd.
4. Profit.
Does this make sense, and if so, what format is /dev/block/mmcblk0p8? Based on the steps to install KatKiss I would have guessed f2fs, but the mount error above makes me think otherwise.
Thanks in advance for your help.
ACP
Hello everyone
I am having trouble mounting second partition of my external sdcard. I’ve already done as much research as i could but i couldn’t find the answer.
I am using busybox to try to mount /dev/block/mmcbl1p2 to any folder (tried in /mnt; /storage; /mnt/media_rw; and many more) but my mount command says invalid argument.
To explain what i did, in short i have a raspberry pi, i used piped unzip to dd command to write the raspbian image on my sdcard. dd command was successful and raspberry pi can boot from it. What i am trying to is setup my raspberry headless by editing /etc/network/interfaces which is located in second (ext4) partition of my extSdCard.
I know android understands linux file systems but i also know it only mounts first vfat od sdcard. Is there any way to access the files from second partition of my extSdCard ?
I am not sure how to find the answer since everything on google is related to moving apps to sdcard
Thanks
Device: Huawei Y5II - CUN-L01
Stock rom
I managed to set it up headless by using UsbTethering and connect to ssh through that connection since dhcp is auto enabled on this image for raspberry, but i would still like to know how to mount this partition. Thank you
TLDR; After installing Remix OS for PC 3.0.207 on USB and booting in Resident mode, subsequent boots result in REMIXOSDATA partition corruption, and turning off 'Enable disk partition mount' under Experimental Features doesn't help.
Does anyone have a solution?
I realize this problem has been mentioned in several places like here, here and here, but the only solution proposed (turn off Enable disk partition mount under Experimental Features) doesn't work for me. Even if I turn it off on first boot, on subsequent boots the system still reports a USB corruption, and Windows shows the partition as Raw.
Ignoring the error message seems to be one way to live with it, but I feel like it's a shame to waste the partition disk space by leaving it unused.
I know Jide has stopped development on Remix OS for PC, but I am still keen to get Android running on my Windows 2-in-1 if possible.
Does anyone have any solutions?
Assuming you have installed to an ext4 partition, you might want to try 'sudo e2fsck -fv /dev/sdxy' in a Linux terminal. (change sdxy to your partition designation)
Thanks for the reply. I formatted my USB stick with Fat32. I've never tried formatting it in ext4 - I'll give it a go and report back. Do you think ext4 will avoid the whole corrupted partition problem altogether? Or does the 'sudo e2fsck -fv /dev/sdxy' command need to be done to fix the corrupted partition every boot?
Think I have misunderstood. Thought you installed from the USB to a partition on the PC. The command is to clean a dirty ext partition, often created when you force the shutdown, not every boot. I always use ext4, so I have no experience with running RemixOS on fat32.
Okay - no worries. Do you have Remix OS for PC installed on an ext4 partition on your PC? Does it work fine?
Yes I have RemixOS on one of my PC's partitions and it works well https://goo.gl/BJjB0X