Re: Recovering from btrfs error Couldn't read chunk root.

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Unrecoverable?
I know i cant mount and have access but my data are still there intact
( as i was using them till the reboot) i shouldn't be able to
extract/recover them to another disc? With any magic command without
mounting?
Any other solutions?

http://bpaste.net/show/118112/

On 29 July 2013 15:06, Wang Shilong <wangshilong1991@xxxxxxxxx> wrote:
>
> 在 2013-7-29,上午2:12,Kyriakos <kyriakosbrastianos@xxxxxxxxx> 写道:
>
>> Just tried it as you said with the -v option enabled
>> This is my output:
>>
>> http://bpaste.net/show/118112/
>>
>>
> This is a *long* email, and seems that btrfs list refuse it.
>
>>  Device extent: devid = 1, start = 1667558801408, len = 1073741824,
>> chunk offset = 1663255445504
>> Couldn't map the block 626309926912
>> btrfs: volumes.c:1020: btrfs_num_copies: Assertion `!(ce->start >
>> logical || ce->start + ce->size < logical)' failed.
>> Aborted (core dumped)
>
> Strange enough, we don't find any chunks during scanning process.
>
> And seems this is unrecoverable ~_~
>
>
> Wang,
>>
>>
>> Any thoughts?
>>
>> On 28 July 2013 08:17, Wang Shilong <wangshilong1991@xxxxxxxxx> wrote:
>>> Hello,
>>>
>>> It seems Btrfs Chunk Tree is damaged, so you can not mount Btrfs filesystem any more.
>>>
>>> However, you can try the latest Btrfs-progs, Miao Xie implements chunk tree recover function.
>>>
>>> The url is:
>>>
>>>        git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git
>>>
>>>
>>> you can try it:
>>>                btrfs chunk-recover  -v <dev>
>>>
>>> This is Time-consuming, because it will scan the whole disk. And also,
>>> please catch output of processing(this is helpful to us if the recovery fails, -v option
>>> enable this).
>>>
>>> Thanks,
>>> Wang
>>>
>>>
>>>
>>>
>>>
>>>
>
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