Date: Tue, 25 Jun 2019 16:53:56 +0100 From: Mike Clarke <jmc-freebsd2@milibyte.co.uk> To: FreeBSD questions <freebsd-questions@freebsd.org> Subject: Confused by zfs errors Message-ID: <2445405.ffieBuXMo3@curlew>
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I'm using zfs on FreeBSD 12.0-RELEASE-p4 GENERIC amd64 on a desktop system which is shut down each night and rebooted each morning and my daily periodic scripts are reporting some filesystem errors which I am unable to fix and are somewhat confusing.
/etc/periodic/security/100.chksetuid is reporting:
---------------------------------------------------
Checking setuid files and devices:
find: /home/liz/Maildir/cur/1342434798.M711754P2579.curlew.lan,S=82312,W=83431:2,S: Unknown error: 122
find: /home/mike/Maildir/cur/1354984767.M156539P5390.curlew.lan,S=217133,W=220003:2,RS: Unknown error: 122
find: /home/mike/Maildir/cur/1387550678.M716573P2948.curlew.lan,S=99139,W=101030:2,S: Unknown error: 122
find: /home/mike/mp3/tapes/Wind Music of Holst & Vaughan Williams: Unknown error: 122
---------------------------------------------------
And /etc/periodic/daily/404.status-zfs is reporting:
---------------------------------------------------
Checking status of zfs pools:
NAME SIZE ALLOC FREE CKPOINT EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT
ssd 119G 48.1G 70.9G - - 32% 40% 1.00x ONLINE -
sys 460G 314G 146G - - 48% 68% 1.00x ONLINE -
pool: sys
state: ONLINE
status: One or more devices has experienced an error resulting in data
corruption. Applications may be affected.
action: Restore the file in question if possible. Otherwise restore the
entire pool from backup.
see: http://illumos.org/msg/ZFS-8000-8A
scan: scrub repaired 0 in 0 days 01:28:12 with 0 errors on Wed Jun 5 11:01:47 2019
config:
NAME STATE READ WRITE CKSUM
sys ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
gpt/sys2 ONLINE 0 0 0
gpt/sys1 ONLINE 0 0 0
errors: 1 data errors, use '-v' for a list
---------------------------------------------------
I've checked the memory with Memtest86 which reports some errors in the hammer test which I imagine could be the cause of the filesystem corruption and I'm in the process of raising a ticket to replace the memory modules under warranty but in the meantime I need to try to fix the errors in the filesystem.
The first problem is that I can't fix the "Unknown error: 122" message for the mp3 directory and the 3 mail files because if I try to delete them or copy my backup copies into them I just get another 122 error.
When I run zpool status -v sys I get the following:
---------------------------------------------------
pool: sys
state: ONLINE
status: One or more devices has experienced an error resulting in data
corruption. Applications may be affected.
action: Restore the file in question if possible. Otherwise restore the
entire pool from backup.
see: http://illumos.org/msg/ZFS-8000-8A
scan: scrub repaired 0 in 0 days 01:28:12 with 0 errors on Wed Jun 5 11:01:47 2019
config:
NAME STATE READ WRITE CKSUM
sys ONLINE 0 0 15
mirror-0 ONLINE 0 0 60
gpt/sys2 ONLINE 0 0 60
gpt/sys1 ONLINE 0 0 60
errors: Permanent errors have been detected in the following files:
sys/DATA/home:<0x0>
Can I resolve the sys/DATA/home:<0x0> issue without destroying the entire pool and restoring from backup? Yes I do have a full backup which is free from these errors but I'd prefer to avoid deleting everything unless I really have to.
The above zpool status from the command line is reporting CKSUM errors which the periodic script reports as all zeros. I've checked this over a number of days and the script always reports zeros while checks from the command line always give a number of CKSUM errors which vary (up and down) from day to day.
I also see that if I run zpool scrub without the -v option as a normal user it reports "errors: 2 data errors, use '-v' for a list" but when I run it as root it only reports 1 data error.
The errors first occurred before I ran zpool scrub on June 5 but scrub was not able to repair them.
--
Mike Clarke
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