Re: Help with data recovering

[Liu Bo <liubo2009@cn.fujitsu.com>]

On 06/04/2012 10:18 AM, Maxim Mikheev wrote:

> Hi Liu,
> 
> 1) all of them not working (see dmesg at the end)
> 2)
> max@s0:~$ sudo btrfs scrub start /dev/sdb
> ERROR: getting dev info for scrub failed: Inappropriate ioctl for device
> max@s0:~$ sudo btrfs scrub start /dev/sda
> ERROR: getting dev info for scrub failed: Inappropriate ioctl for device
> max@s0:~$ sudo btrfs scrub start /dev/sdd
> ERROR: getting dev info for scrub failed: Inappropriate ioctl for device
> max@s0:~$ sudo btrfs scrub start /dev/sde
> ERROR: getting dev info for scrub failed: Inappropriate ioctl for device
> max@s0:~$ sudo btrfs scrub start /dev/sdf
> ERROR: getting dev info for scrub failed: Inappropriate ioctl for device
> 


(add Jan and Arne to cc, they are authors of scrub)

I'm not an expert on scrub, and I'm not clear how to scrub a device directly :(

btw, have you tried restore (for attempting to recover data from an unmountable filesystem):

https://btrfs.wiki.kernel.org/index.php/Restore

thanks,
liubo


> dmesg after all operations:
> [ 2183.864056] device fsid c9776e19-37eb-4f9c-bd6b-04e8dde97682 devid 2
> transid 9096 /dev/sdb
> [ 2183.916128] btrfs: disk space caching is enabled
> [ 2191.863409] parent transid verify failed on 5468060241920 wanted 9096
> found 7621
> [ 2191.872937] parent transid verify failed on 5468060241920 wanted 9096
> found 7621
> [ 2191.873666] btrfs read error corrected: ino 1 off 5468060241920 (dev
> /dev/sdb sector 2143292648)
> [ 2191.873678] Failed to read block groups: -5
> [ 2191.884636] btrfs: open_ctree failed
> [ 2222.910225] device fsid c9776e19-37eb-4f9c-bd6b-04e8dde97682 devid 3
> transid 9095 /dev/sdd
> [ 2222.959128] btrfs: disk space caching is enabled
> [ 2231.264285] parent transid verify failed on 5468060241920 wanted 9096
> found 7621
> [ 2231.274306] parent transid verify failed on 5468060241920 wanted 9096
> found 7621
> [ 2231.275194] btrfs read error corrected: ino 1 off 5468060241920 (dev
> /dev/sdd sector 2143292648)
> [ 2231.275207] Failed to read block groups: -5
> [ 2231.288795] btrfs: open_ctree failed
> [ 2240.624691] device fsid c9776e19-37eb-4f9c-bd6b-04e8dde97682 devid 4
> transid 9096 /dev/sde
> [ 2240.671344] btrfs: disk space caching is enabled
> [ 2248.916772] parent transid verify failed on 5468060241920 wanted 9096
> found 7621
> [ 2248.928106] parent transid verify failed on 5468060241920 wanted 9096
> found 7621
> [ 2248.929091] btrfs read error corrected: ino 1 off 5468060241920 (dev
> /dev/sdd sector 2143292648)
> [ 2248.929105] Failed to read block groups: -5
> [ 2248.939081] btrfs: open_ctree failed
> [ 2253.829071] device fsid c9776e19-37eb-4f9c-bd6b-04e8dde97682 devid 5
> transid 9096 /dev/sdf
> [ 2253.879940] btrfs: disk space caching is enabled
> [ 2261.754357] parent transid verify failed on 5468060241920 wanted 9096
> found 7621
> [ 2261.767118] parent transid verify failed on 5468060241920 wanted 9096
> found 7621
> [ 2261.767929] btrfs read error corrected: ino 1 off 5468060241920 (dev
> /dev/sdb sector 2143292648)
> [ 2261.767942] Failed to read block groups: -5
> [ 2261.778219] btrfs: open_ctree failed
> [ 2309.831415] device fsid c9776e19-37eb-4f9c-bd6b-04e8dde97682 devid 1
> transid 9096 /dev/sda
> [ 2309.904520] btrfs: disk space caching is enabled
> [ 2318.286463] parent transid verify failed on 5468060241920 wanted 9096
> found 7621
> [ 2318.302991] parent transid verify failed on 5468060241920 wanted 9096
> found 7621
> [ 2318.304000] btrfs read error corrected: ino 1 off 5468060241920 (dev
> /dev/sdd sector 2143292648)
> [ 2318.304013] Failed to read block groups: -5
> [ 2318.314587] btrfs: open_ctree failed
> 
> On 06/03/2012 10:16 PM, Liu Bo wrote:
>> On 06/04/2012 09:43 AM, Maxim Mikheev wrote:
>>
>>> Hi Liu,
>>>
>>> thanks for advice. I tried it before btrfsck. results are here:
>>> max@s0:~$ sudo mount /tank -o recovery
>>> [sudo] password for max:
>>> mount: wrong fs type, bad option, bad superblock on /dev/sdf,
>>>         missing codepage or helper program, or other error
>>>         In some cases useful info is found in syslog - try
>>>         dmesg | tail  or so
>>>
>>> max@s0:~$ sudo mount -o recovery /tank
>>> mount: wrong fs type, bad option, bad superblock on /dev/sdf,
>>>         missing codepage or helper program, or other error
>>>         In some cases useful info is found in syslog - try
>>>         dmesg | tail  or so
>>>
>>
>> Two possible ways:
>>
>> 1)
>> I noticed that your btrfs had 5 partitions in all:
>> mkfs.btrfs /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf
>>
>> Can you try to mount other disk partitions instead by hand, like:
>> mount /dev/sdb /tank
>> mount /dev/sdc /tank
>> mount /dev/sdd /tank
>> mount /dev/sde /tank
>> mount /dev/sdf /tank
>>
>> 2)
>> use btrfs's scrub to resort to metadata backups created by RAID1.
>>
>> thanks,
>> liubo
>>
>>> dmesg after boot before mount -o recovery:
>>> [   51.829352] parent transid verify failed on 5468060241920 wanted 9096
>>> found 7621
>>> [   51.841153] parent transid verify failed on 5468060241920 wanted 9096
>>> found 7621
>>> [   51.841603] btrfs read error corrected: ino 1 off 5468060241920 (dev
>>> /dev/sdb sector 2143292648)
>>> [   51.841610] Failed to read block groups: -5
>>> [   51.848057] btrfs: open_ctree failed
>>> ..............................
>>> dmesg after both mounts:
>>>
>>> [  123.687773] device fsid c9776e19-37eb-4f9c-bd6b-04e8dde97682 devid 5
>>> transid 9096 /dev/sdf
>>> [  123.733678] btrfs: use lzo compression
>>> [  123.733683] btrfs: enabling auto recovery
>>> [  123.733686] btrfs: disk space caching is enabled
>>> [  131.699910] parent transid verify failed on 5468060241920 wanted 9096
>>> found 7621
>>> [  131.714018] parent transid verify failed on 5468060241920 wanted 9096
>>> found 7621
>>> [  131.715059] btrfs read error corrected: ino 1 off 5468060241920 (dev
>>> /dev/sdb sector 2143292648)
>>> [  131.715072] Failed to read block groups: -5
>>> [  131.727176] btrfs: open_ctree failed
>>> [  161.697873] device fsid c9776e19-37eb-4f9c-bd6b-04e8dde97682 devid 5
>>> transid 9096 /dev/sdf
>>> [  161.746345] btrfs: use lzo compression
>>> [  161.746354] btrfs: enabling auto recovery
>>> [  161.746358] btrfs: disk space caching is enabled
>>> [  169.720823] parent transid verify failed on 5468060241920 wanted 9096
>>> found 7621
>>> [  169.732048] parent transid verify failed on 5468060241920 wanted 9096
>>> found 7621
>>> [  169.732611] btrfs read error corrected: ino 1 off 5468060241920 (dev
>>> /dev/sdb sector 2143292648)
>>> [  169.732623] Failed to read block groups: -5
>>> [  169.743437] btrfs: open_ctree failed
>>>
>>> So It does not work. I have seen in some posts command:
>>>
>>> sudo mount -s 2 -o recovery /tank
>>> Should I try it?
>>>
>>> Please help me, I need to get this data ASAP.
>>>
>>> Regards,
>>>     Max
>>>
>>> On 06/03/2012 09:22 PM, Liu Bo wrote:
>>>> On 06/02/2012 09:43 PM, Maxim Mikheev wrote:
>>>>
>>>>> Repair was not helpful.
>>>>> Is any other ways to get access to data?
>>>>>
>>>>> Please help....
>>>>>
>>>> Hi Maxim,
>>>>
>>>> Besides btrfsck --repair, we also have a recovery mount option to deal
>>>> with your situation,
>>>> maybe you can try mount xxx -o recovery and see if it helps?
>>>>
>>>>
>>>> thanks,
>>>> liubo
>>>>
>>>>> On 05/30/2012 11:15 PM, Michael K wrote:
>>>>>> Let it run to completion. There is little you can do other than hope
>>>>>> and wait.
>>>>>>
>>>>>> On May 30, 2012 9:02 PM, "Maxim Mikheev"<mikhmv@gmail.com
>>>>>> <mailto:mikhmv@gmail.com>>   wrote:
>>>>>>
>>>>>>       btrfsck --repair running already for 26 hours.
>>>>>>
>>>>>>       Is it have sense to wait more?
>>>>>>
>>>>>>       Thanks
>>>>>>
>>>>>>       On 05/29/2012 07:36 PM, cwillu wrote:
>>>>>>
>>>>>>           On Tue, May 29, 2012 at 5:24 PM, Maxim
>>>>>>           Mikheev<mikhmv@gmail.com<mailto:mikhmv@gmail.com>>   
>>>>>> wrote:
>>>>>>
>>>>>>               Thank you for your answer.
>>>>>>
>>>>>>
>>>>>>               The system kernel was and now:
>>>>>>
>>>>>>               Linux s0 3.4.0-030400-generic #201205210521 SMP Mon
>>>>>> May 21
>>>>>>               09:22:02 UTC 2012
>>>>>>               x86_64 x86_64 x86_64 GNU/Linux
>>>>>>
>>>>>>               the raid was created by:
>>>>>>               mkfs.btrfs /dev/sdb /dev/sdc /dev/sdd /dev/sde /dev/sdf
>>>>>>
>>>>>>               Disk are connected through RocketRaid 2670.
>>>>>>
>>>>>>               for mounting I used line in fstab:
>>>>>>               UUID=c9776e19-37eb-4f9c-bd6b-04e8dde97682    /tank
>>>>>>                btrfs
>>>>>>                defaults,compress=lzo    0    1
>>>>>>
>>>>>>               On machine was running several Virtual machines.
>>>>>> Only one
>>>>>>               was actively using
>>>>>>               disks.
>>>>>>
>>>>>>               VM has active several threads:
>>>>>>               1. 2 threads reading big files (50GB each)
>>>>>>               2. reading from 50 files and writing one big file
>>>>>>               3. The kernel panic happens when I run another program
>>>>>>               with 30 threads of
>>>>>>               reading/writing of small files.
>>>>>>
>>>>>>               Virtual Machine accessed to underline btrfs through 9-p
>>>>>>               file system which
>>>>>>               actively used xattr.
>>>>>>
>>>>>>               After reboot system was in this stage.
>>>>>>
>>>>>>               I hope that btrfsck --repair will not make it worse,
>>>>>> It is
>>>>>>               now running.
>>>>>>
>>>>>>           **twitch**
>>>>>>
>>>>>>           Well, I also hope it won't make it worse.  Do not cancel it
>>>>>>           now, let
>>>>>>           it finish (aborting it will  make things worse), but I
>>>>>> suggest
>>>>>>           waiting
>>>>>>           until a few more people have weighed in before attempting
>>>>>> anything
>>>>>>           beyond that.
>>>>>>
>>>>>>       --
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