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Error-Fixing Btrfs FSCK Tool Is Imminent

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  • #16
    btrfs is unstable and fsck is not working

    Current implementation of btrfs completely unstable. It even does not need power outage to make system unrecoverable.
    Yesterday we setup wget downloading from 10 different sources. in the result system gave kernel panic. We can not mount it now at all and current fsck gave following message.

    ~$ sudo btrfsck /dev/vdc
    [sudo] password for biouml:
    parent transid verify failed on 20971520 wanted 1347 found 3121
    parent transid verify failed on 20971520 wanted 1347 found 3121
    parent transid verify failed on 20971520 wanted 1347 found 3121
    parent transid verify failed on 20971520 wanted 1347 found 3121
    Ignoring transid failure
    parent transid verify failed on 29470720 wanted 1357 found 3231
    parent transid verify failed on 29470720 wanted 1357 found 3231
    parent transid verify failed on 29470720 wanted 1357 found 3231
    parent transid verify failed on 29470720 wanted 1357 found 3231
    Ignoring transid failure
    parent transid verify failed on 29470720 wanted 1357 found 3231
    Ignoring transid failure
    parent transid verify failed on 29487104 wanted 1357 found 3235
    parent transid verify failed on 29487104 wanted 1357 found 3235
    parent transid verify failed on 29487104 wanted 1357 found 3235
    parent transid verify failed on 29487104 wanted 1357 found 3235
    Ignoring transid failure
    leaf 29487104 items 1 free space 3454 generation 3235 owner 7
    fs uuid c5ce4702-2dbf-4b57-8067-bd6129fc124b
    chunk uuid 0ffa84fe-33a3-4b8e-95a4-de5f93e88163
    item 0 key (EXTENT_CSUM EXTENT_CSUM 64343257088) itemoff 3479 itemsize 516
    extent csum item
    failed to find block number 150802432

    With ext4 I have never had problems during regular multithreaded IO, but btrfs cannot handle even this.

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