[Q] Internal memory become read-only

mm_d · Apr 18, 2012

Sorry for my English.

I have NT 16G with CM7. After waking device from sleep, I was unable to toggle wi-fi state, it stuck on "Turning off.." message. When I tried to restart tablet, it shutdown but not boot up. Just stuck with blank screen and backlight on. So I held power button to shut it off. Then turn it on again.

After that, I can't change anything in internal memory. Device turns on and works for some time, but then restarts on it's own and go back to state before wi-fi problem. Any changes, as new/removed files, applications etc, revert back. Even full wipe via Ubuntu didn't work: after reboot everything back to previous state.

In dmesg I have message

Code:

mmcblk0: retrying using single block read

Any suggestions?

soshite · Apr 18, 2012

Can you boot into cwm? Try fixing permissions and try again.

mm_d · Apr 19, 2012

soshite said:
Can you boot into cwm? Try fixing permissions and try again.

It didn't change anything. Looks like I have hardware damage. Is it possible?

Demetris · Apr 19, 2012

Its a kernel regression, you need to format that mmcblk0 and re-create.
If this doesn't work sent for replacement as it may be a faulty chip.

mm_d · Apr 19, 2012

How can I format it? It doesn't accept any changes. Is there any other way?

soshite · Apr 19, 2012

Reformatting the internal partition can be a screwy and hard thing to do. Not because it's hard to format, but simply because it's hard to retrieve the original table. Because the first 4 partitions are very secure, They need to be matching perfectly with Barnes & Noble's partition table. I recommend you just try my guide on unbricking stuff:

http://xdaforums.com/showthread.php?t=1605664

mm_d · Apr 19, 2012

I've tried your method too, with no results.

soshite · Apr 19, 2012

mm_d said:
I've tried your method too, with no results.

Interesting. :l Have you tried booting off the sdcard? What do your partition table look like? Do you have it by any chance?

mm_d · Apr 19, 2012

Yes, I boot via sdcard into CWM, CM7, Ubuntu. From sdcard everything works.
parted output don't show anything unusual

Code:

Model: MMC SEM16G (sd/mmc)
Disk /dev/block/mmcblk0: 15.9GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system  Name        Flags
 1      131kB   262kB   131kB                xloader
 2      262kB   524kB   262kB                bootloader
 3      524kB   16.3MB  15.7MB               recovery
 4      16.8MB  33.6MB  16.8MB               boot
 5      33.6MB  83.9MB  50.3MB  fat32        rom
 6      83.9MB  134MB   50.3MB  fat32        bootdata
 7      134MB   522MB   388MB   ext4         factory
 8      522MB   1164MB  642MB   ext4         system
 9      1164MB  1611MB  447MB   ext4         cache
10      1611MB  13.6GB  12.0GB  fat32        media       msftres
11      13.6GB  15.9GB  2315MB  ext4         userdata

soshite · Apr 19, 2012

mm_d said:

Yes, I boot via sdcard into CWM, CM7, Ubuntu. From sdcard everything works.
parted output don't show anything unusual

Code:

Model: MMC SEM16G (sd/mmc)
Disk /dev/block/mmcblk0: 15.9GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system  Name        Flags
 1      131kB   262kB   131kB                xloader
 2      262kB   524kB   262kB                bootloader
 3      524kB   16.3MB  15.7MB               recovery
 4      16.8MB  33.6MB  16.8MB               boot
 5      33.6MB  83.9MB  50.3MB  fat32        rom
 6      83.9MB  134MB   50.3MB  fat32        bootdata
 7      134MB   522MB   388MB   ext4         factory
 8      522MB   1164MB  642MB   ext4         system
 9      1164MB  1611MB  447MB   ext4         cache
10      1611MB  13.6GB  12.0GB  fat32        media       msftres
11      13.6GB  15.9GB  2315MB  ext4         userdata

So everything looks fine. Have you dumped xloader bootloader recovery and boot partition using lavero.burgos. images??

Sent from my NookTablet using XDA

Demetris · Apr 19, 2012

dd back the partitions, you will find a backup of them if you search the forum

mm_d · Apr 20, 2012

I've tried it already. It didn't change anything.

Demetris · Apr 20, 2012

Any errors?

mm_d · Apr 20, 2012

Demetris · Apr 20, 2012

So remove partitions 1by1 format and re-create.
I cant see anything else to work.
You can use a custom recovery with excellent tools for you made by meghd00.
I recommend to use that.
After this report back.

mm_d · Apr 20, 2012

I've tried meghd00t method already. No results.
parted log

Code:

~ # parted /dev/block/mmcblk0
GNU Parted 1.8.8.1.179-aef3
Using /dev/block/mmcblk0
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) print                                                            
print
Model: MMC SEM16G (sd/mmc)
Disk /dev/block/mmcblk0: 15.9GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system  Name        Flags
 1      131kB   262kB   131kB                xloader
 2      262kB   524kB   262kB                bootloader
 3      524kB   16.3MB  15.7MB               recovery
 4      16.8MB  33.6MB  16.8MB               boot
 5      33.6MB  83.9MB  50.3MB  fat32        rom
 6      83.9MB  134MB   50.3MB  fat32        bootdata
 7      134MB   522MB   388MB   ext4         factory
 8      522MB   1164MB  642MB   ext4         system
 9      1164MB  1611MB  447MB   ext4         cache
10      1611MB  13.6GB  12.0GB  fat32        media       msftres
11      13.6GB  15.9GB  2315MB  ext4         userdata

(parted) rm 11                                                            
rm 11
(parted) rm 10                                                            
rm 10
(parted) rm 8                                                             
rm 8
(parted) print                                                            
print
Model: MMC SEM16G (sd/mmc)
Disk /dev/block/mmcblk0: 15.9GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt

Number  Start   End     Size    File system  Name        Flags
 1      131kB   262kB   131kB                xloader
 2      262kB   524kB   262kB                bootloader
 3      524kB   16.3MB  15.7MB               recovery
 4      16.8MB  33.6MB  16.8MB               boot
 5      33.6MB  83.9MB  50.3MB  fat32        rom
 6      83.9MB  134MB   50.3MB  fat32        bootdata
 7      134MB   522MB   388MB   ext4         factory
 8      522MB   1164MB  642MB   ext4         system
 9      1164MB  1611MB  447MB   ext4         cache
10      1611MB  13.6GB  12.0GB  fat32        media       msftres
11      13.6GB  15.9GB  2315MB  ext4         userdata

Demetris · Apr 20, 2012

Are you on linux?

mm_d · Apr 20, 2012

Demetris · Apr 20, 2012

mm_d said:
Yes.

sudo fdisk /dev/block/mmcblk0

mm_d · Apr 20, 2012

demetris_I said:
sudo fdisk /dev/block/mmcblk0

You talking about tablet or PC?

[Q] Internal memory become read-only

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