Re: Btrfs suddenly unmountable, open_ctree failed

[Wang Shilong <wangsl.fnst@cn.fujitsu.com>]

Hi Mike,

On 06/24/2014 11:04 AM, Mike Hartman wrote:
> I have no particular desire to use it. I just tried everything else
> first and thought it was worth a shot.
>
> If you think that version would help, can you point me to the git
> repo? The one I grabbed was
> git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git.
Of course,  You could pull from the following url:

https://github.com/kdave/btrfs-progs.git  integration-20140619

>
> On Mon, Jun 23, 2014 at 10:20 PM, Wang Shilong
> <wangsl.fnst@cn.fujitsu.com> wrote:
>> On 06/24/2014 09:17 AM, Chris Murphy wrote:
>>> On Jun 23, 2014, at 4:18 PM, Mike Hartman <mike@hartmanipulation.com>
>>> wrote:
>>>
>>>> Can anyone offer any suggestions? Is this data really unrecoverable? I
>>>> have no idea what could have gone so severely wrong.
>>> "btrfs check --repair /media/mint/usb_data/sda6_check.img
>>> "btrfs check --repair --init-csum-tree --init-extent-tree
>>> /media/mint/usb_data/sda6_check.img
>> My two cents:-)
>>
>> If you really want to use btrfs check  --init-csum-tree --init-extent-tree,
>> i'd suggest you use
>> David Latest btrfs-progs branch which includes some latest bug fixes.
>>
>>> I think these things are going too far on actual file system without
>>> guidance, so it's superb you imaged the original drive first. Too many
>>> people get aggressive writing to the actual drive without backup images. You
>>> have both a dd image as well as btrfs-image which is really great. Hopefully
>>> someone can help find out what happened, it seems abruptly catastrophic, but
>>> also mixes messages where some information is being found but this one:
>>>          * read block failed check_tree_block
>>> makes me think of partial media failure. It would be damn bad luck if your
>>> metadata is set to DUP, yet both copies are toast. Is this an HDD or SSD?
>>>
>>> Can you post the result from smartctl -x /dev/sdX   #for the disk in
>>> question, maybe from a live system?
>>>
>>>
>>> Chris Murphy
>>>
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> .
>