Good morning,
On a small system using FreeBSD 9.0-RELEASE, ZFS is reporting an issue
on a pool, that I am not certain is really an issue, but I don't know
how to investgate...
Here is the situation: I have created a ZFS pool on an external 1TB
Maxstor USB drive.
The ZFS pool sees little or no activity, I haven't started using it for
real yet.
The drive spins down frequently because of lack of activity, and takes
quite a few seconds to spin up.
Now, I frequently get errors in the 'zpool status' thus (like, a couple
of times per day):
> [denis@datasink] ~> zpool status -v
> pool: maxstor
> state: ONLINE
> status: One or more devices has experienced an unrecoverable error. An
> attempt was made to correct the error. Applications are
unaffected.
> action: Determine if the device needs to be replaced, and clear the
errors
> using 'zpool clear' or replace the device with 'zpool replace'.
> see: http://www.sun.com/msg/ZFS-8000-9P
> scan: scrub repaired 0 in 0h0m with 0 errors on Sat Feb 18 08:49:41 2012
> config:
>
> NAME STATE READ
WRITE CKSUM
> maxstor ONLINE
0 0 0
> gptid/64a30ca9-56ad-11e1-80c4-000024ce7c30 ONLINE
1 0 0
>
> errors: No known data errors
> [denis@datasink] ~> zpool iostat -v maxstor
> capacity operations
bandwidth
> pool alloc free read write
read write
> -------------------------------------- ----- ----- ----- -----
----- -----
> maxstor 1.10M 928G 0 0
455 1.11K
> gptid/64a30ca9-56ad-11e1-80c4-000024ce7c30 1.10M 928G
0 0 455 1.11K
> -------------------------------------- ----- ----- ----- -----
----- -----
I know that this sounds bad for the drive, but I cannot find anywhere in
my logs (/var/log/messages, dmesg, etc) a reference to this supposed
'unrecoverable error' that the drive has had, and the resilvering
*always* works.
I am wondering whether it might not simply be a timeout issue, that is:
the drive is taking too long to spin up, which causes a timeout and a
read error to be reported, which then disappears completely once the
drive has spun up.
Does anybody have a suggestion about how I could go about investigating
this issue? Shouldn't there be a log of the 'unrecoverable error'
somewhere?
Thank you all,
Denis
_______________________________________________
freebsd-questions@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-questions
To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
