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Last Post:
Nov 4, 2009 7:34 AM
by: bfriesen
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Steven Samuel C...
steven.samuel.cole@g...
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[zfs-discuss] ZFS non-zero checksum and permanent error with
deleted file
Posted:
Nov 3, 2009 9:51 PM
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Hello,
I am actually using ZFS under FreeBSD, but maybe someone over here can
help me anyway. I'd like some advice if I still can rely on one of my
ZFS pools:
[user@host ~]$ sudo zpool clear zpool01
...
[user@host ~]$ sudo zpool scrub zpool01
...
[user@host ~]$ sudo zpool status -v zpool01
pool: zpool01
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
config:
NAME STATE READ WRITE CKSUM
zpool01 ONLINE 0 0 4
raidz1 ONLINE 0 0 4
ad12 ONLINE 0 0 0
ad14 ONLINE 0 0 0
ad16 ONLINE 0 0 0
ad18 ONLINE 0 0 0
errors: Permanent errors have been detected in the following files:
zpool01:<0x3736a>
How can there be an error in a file that does not seem to exist ?
How can I clear / recover from the error ?
I have read the corresponding documentation and did the obligatory
research, but so far, the only option I can see is a full destroy/create
cycle - which seems an overkill, considering the pool size and the fact
that there seems to be only one (deleted ?) file involved.
[user@host ~]$ df -h /mnt/zpool01/
Filesystem Size Used Avail Capacity Mounted on
zpool01 1.3T 1.2T 133G 90% /mnt/zpool01
[user@host ~]$ uname -a
FreeBSD host.domain 7.2-RELEASE FreeBSD 7.2-RELEASE #0: Fri May 1
07:18:07 UTC 2009
root at driscoll dot cse dot buffalo dot edu:/usr/obj/usr/src/sys/GENERIC amd64
Cheers,
ssc
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Posts:
719
From:
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Registered:
8/19/08
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Re: [zfs-discuss] ZFS non-zero checksum and permanent error with
deleted file
Posted:
Nov 4, 2009 7:34 AM
in response to: Steven Samuel C...
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On Wed, 4 Nov 2009, Steven Samuel Cole wrote:
>
> errors: Permanent errors have been detected in the following files:
>
> zpool01:<0x3736a>
>
>
> How can there be an error in a file that does not seem to exist ?
I don't know the answer to this. Maybe it is data retained by a
snapshot?
> How can I clear / recover from the error ?
It seems likely that this command will clear it:
zpool clear zpool01
and then you can pretend it did not happen.
Definitely do
zpool scrub zpool01
to see if there is any other decay.
Bob
--
Bob Friesenhahn
bfriesen at simple dot dallas dot tx dot us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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