[zfs-discuss] files with permanent errors

rondzierwa at comcast.net
2012-06-22T20:33:15Z

I am running ZFS filesystem version 4 and storage pool version 15 on a FreeBSD
8.2-Release-amd64 kernel. I have a single 12TB pool based on a 3ware 9650
controller with 8 seagate ST2000DL003 drives in a raid-5 configuration managed
by the controller.

I recently had a connector problem on a disk in the array while running a
performance test that was writing a 1TB pattern file to the array. When the raid
controller started reporting errors I stopped the test and re-seated the
connector on the drive. After running a verify on the raid, I tried to read the
partial pattern file and ZFS produced copious amounts of checksum error messages
on the system console. So, I rm''ed the file, and got even more checksum
errors interspersed with several I/O error 86 messages. Since the rm, ls no
longer shows the file, but I did a scrub just to be sure the bogus file was
gone, and got tons of checksum and i/o 86 errors. At the end, zpool status
shows:

phoenix# zpool status -v zfsPool
pool: zfsPool
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://www.sun.com/msg/ZFS-8000-8A
scrub: scrub completed after 3h40m with 6353 errors on Fri Jun 22 08:36:36 2012
config:

NAME STATE READ WRITE CKSUM
zfsPool ONLINE 0 0 6.20K
da0 ONLINE 0 0 12.4K

errors: Permanent errors have been detected in the following files:

zfsPool/raid:<0x9e241>


I have tried "zpool clear"/reboot/"zpool scrub" several
times now, and get a similar set of errors and results.

My question is - How do I get rid of this file? It is no longer linked to a
directory entry, and there shouldn''t be anybody with it open since I
have rebooted several times. yet, zfs still tells me there''s a broken
file and I should replace it. It is most likely the pattern test file that I
deleted, so I don''t need it and I don''t want to recover it. i
would just like to get rid of it and get my filesystem clean again without
resorting to starting over.


thanks,
ron.


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