constant zfs data corruption
delphij at delphij.net
Fri Oct 17 11:50:04 PDT 2008
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> constantly I find data corruption on ZFS volums, ever from rrdtool, this
> corrupt data happens on SATA disks, never seem on SCSI
> scrub is not able to repair, when comes to touch this files machines reboots,
> deleting and restorin also is not possíble, seems I need to delete the files,
> umount, scrub and mount again to clear it
> # zpool status -v os
> pool: os
> 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: none requested
> NAME STATE READ WRITE CKSUM
> os ONLINE 0 0 0
> ad4s1d ONLINE 0 0 0
> errors: Permanent errors have been detected in the following files:
> some idea?
For ZFS: I think you need to remove these file. ZFS scrub does not
recover file if you don't have redundant, e.g. copies=2 or raid-z, etc.
For the data corruption itself: I think this is highly critical issue
if you are sure that the hardware is good. What controller and disk are
Xin LI <delphij at delphij.net> http://www.delphij.net/
FreeBSD - The Power to Serve!
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