btrfs check : extent-tree.c:283: find_search_start: Assertion `!(1)' failed

btrfs check : extent-tree.c:283: find_search_start: Assertion `!(1)' failed

[Miguel Negrão]

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Hi,

I have a btrfs partition on a usb external hard drive which doesn't
mount anymore. I tried doing a btrfs check on it, but it fails with the
error on the subject. The btrfs progs were compiled from git today. I
have a backup of this partition elsewhere, so I can restore from there
if all else fails.

The output of

sudo btrfs check --repair /dev/sdc1 > ~/log/btfs-repair-1.log 2>&1

was

parent transid verify failed on 7624175616 wanted 1431 found 1428
parent transid verify failed on 7624175616 wanted 1431 found 1428
Ignoring transid failure
leaf parent key incorrect 7624175616
checking extents
parent transid verify failed on 7624175616 wanted 1431 found 1428
Ignoring transid failure

...


leaf parent key incorrect 7717249024
Unable to find block group for 0
btrfs: extent-tree.c:283: find_search_start: Assertion `!(1)' failed.
enabling repair mode
Checking filesystem on /dev/sdc1
UUID: 42688de3-f4ed-4592-bb34-02c9d5014e51



best,
-- 
Miguel Negrão
http://www.friendlyvirus.org/miguelnegrao



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Re: btrfs check : extent-tree.c:283: find_search_start: Assertion `!(1)' failed

[Miguel Negrão]

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Hi,

Forgot to ask the important question, is it still possible to recover
this filesystem or is it doomed ?

best,
Miguel

Em 20-08-2013 18:16, Miguel Negrão escreveu:
> Hi,
> 
> I have a btrfs partition on a usb external hard drive which doesn't
> mount anymore. I tried doing a btrfs check on it, but it fails with the
> error on the subject. The btrfs progs were compiled from git today. I
> have a backup of this partition elsewhere, so I can restore from there
> if all else fails.
> 
> The output of
> 
> sudo btrfs check --repair /dev/sdc1 > ~/log/btfs-repair-1.log 2>&1
> 
> was
> 
> parent transid verify failed on 7624175616 wanted 1431 found 1428
> parent transid verify failed on 7624175616 wanted 1431 found 1428
> Ignoring transid failure
> leaf parent key incorrect 7624175616
> checking extents
> parent transid verify failed on 7624175616 wanted 1431 found 1428
> Ignoring transid failure
> 
> ...
> 
> 
> leaf parent key incorrect 7717249024
> Unable to find block group for 0
> btrfs: extent-tree.c:283: find_search_start: Assertion `!(1)' failed.
> enabling repair mode
> Checking filesystem on /dev/sdc1
> UUID: 42688de3-f4ed-4592-bb34-02c9d5014e51
> 
> 
> 
> best,
> 


-- 
Miguel Negrão
http://www.friendlyvirus.org/miguelnegrao


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