From: "Jérôme Carretero" <cJ-ko@zougloub.eu>
To: linux-btrfs@vger.kernel.org
Subject: Issues while doing btrfs delete missing in raid6
Date: Mon, 20 Nov 2017 01:43:44 -0500 [thread overview]
Message-ID: <20171120014344.7a5d8bd2@Vantage.cJ> (raw)
Hi,
While doing a test (to evaluate drives), where I'm filling a bunch of
drives in RAID6, one of the disks failed in the process.
(System with v4.14 / ECC).
I remounted the array in degraded, launched a "btrfs delete missing"
as I have no replacement device.
The command (takes ages and) fails with:
ERROR: error removing device 'missing': Input/output error
and klog says:
[631517.263313] BTRFS info (device dm-18): relocating block group 1411883335680 flags data|raid6
[631547.556527] btrfs_print_data_csum_error: 151 callbacks suppressed
[631547.556530] BTRFS warning (device dm-18): csum failed root -9 ino 1177 off 3559653376 csum 0x2e827bb4 expected csum 0xda9c34d6 mirror 2
[631547.562727] BTRFS warning (device dm-18): csum failed root -9 ino 1177 off 3559657472 csum 0x6722cd32 expected csum 0x3ca2ce6f mirror 2
[631547.562730] BTRFS warning (device dm-18): csum failed root -9 ino 1177 off 3559661568 csum 0x90368636 expected csum 0xf55a0410 mirror 2
[631547.562732] BTRFS warning (device dm-18): csum failed root -9 ino 1177 off 3559665664 csum 0x3e38aeb2 expected csum 0x6c80a970 mirror 2
[631547.562746] BTRFS warning (device dm-18): csum failed root -9 ino 1177 off 3559669760 csum 0x77d73f2d expected csum 0xe62cfbe8 mirror 2
[631547.562747] BTRFS warning (device dm-18): csum failed root -9 ino 1177 off 3559673856 csum 0xb03d1632 expected csum 0xe9a3f0e6 mirror 2
[631547.562756] BTRFS warning (device dm-18): csum failed root -9 ino 1177 off 3559677952 csum 0xeea04377 expected csum 0x8819aaf7 mirror 2
[631547.562758] BTRFS warning (device dm-18): csum failed root -9 ino 1177 off 3559682048 csum 0xe46ab546 expected csum 0xacc16686 mirror 2
[631547.562775] BTRFS warning (device dm-18): csum failed root -9 ino 1177 off 3559690240 csum 0x956a74d7 expected csum 0x99e29858 mirror 2
[631547.562788] BTRFS warning (device dm-18): csum failed root -9 ino 1177 off 3559686144 csum 0xb09a35ae expected csum 0x5f61fa99 mirror 2
Since this is RAID6, I wasn't expecting to not be able to recover
from a checksum issue, also it's not very practical to bail out on the first
error of this kind during a delete... the offending blocks could be
left as is.
I then try to work around the issue by removing the offending file
(yes it's a test, but filling the drives takes a lot of time),
finding it with "btrfs inspect-internal inode-resolve 1177", and somehow:
ERROR: ino paths ioctl: No such file or directory
Regards,
--
Jérôme
next reply other threads:[~2017-11-20 6:51 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-20 6:43 Jérôme Carretero [this message]
2017-11-20 6:54 ` Issues while doing btrfs delete missing in raid6 Jérôme Carretero
2017-11-20 7:13 ` Qu Wenruo
2017-11-20 21:57 ` Duncan
2017-11-21 1:06 ` Jérôme Carretero
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