Hi Jason,
I think you are asking how do you tell ZFS that you want to replace the
failed disk c8t7d0 with the spare, c8t11d0?
I just tried do this on my Nevada build 124 lab system, simulating a
disk failure and using zpool replace to replace the failed disk with
the spare. The spare is now busy and it fails. This has to be a bug.
Another way to recover is if you have a replacement disk for c8t7d0,
like this:
1. Physically replace c8t7d0.
You might have to unconfigure the disk first. It depends
on the hardware.
2. Tell ZFS that you replaced it.
# zpool replace tank c8t7d0
3. Detach the spare.
# zpool detach tank c8t11d0
4. Clear the pool or the device specifically.
# zpool clear tank c8t7d0
Cindy
On 10/14/09 14:44, Jason Frank wrote:
So, my Areca controller has been complaining via email of read errors for a
couple days on SATA channel 8. The disk finally gave up last night at 17:40.
I got to say I really appreciate the Areca controller taking such good care of
me.
For some reason, I wasn't able to log into the server last night or in the
morning, probably because my home dir was on the zpool with the failed disk
(although it's a raidz2, so I don't know why that was a problem.) So, I went
ahead and rebooted it the hard way this morning.
The reboot went OK, and I was able to get access to my home directory by
waiting about 5 minutes after authenticating. I checked my zpool, and it was
resilvering. But, it had only been running for a few minutes. Evidently, it
didn't start resilvering until I rebooted it. I would have expected it to do
that when the disk failed last night (I had set up a hot spare disk already).
All of the zpool commands were taking minutes to complete while c8t7d0 was
UNAVAIL, so I offline'd it. When I say all, that includes iostat, status,
upgrade, just about anything non-destructive that I could try. That was a
little odd. Once I offlined the drive, my resilver restarted, which surprised
me. After all, I simply changed an UNAVAIL drive to OFFLINE, in either case,
you can't use it for operations. But no big deal there. That fixed the login
slowness and the zpool command slowness.
The resilver completed, and now I'm left with the following zpool config. I'm
not sure how to get things back to normal though, and I hate to do something
stupid...
r...@datasrv1:~# zpool status tank
pool: tank
state: DEGRADED
scrub: scrub stopped after 0h10m with 0 errors on Wed Oct 14 15:23:06 2009
config:
NAME STATE READ WRITE CKSUM
tank DEGRADED 0 0 0
raidz2 DEGRADED 0 0 0
c8t0d0 ONLINE 0 0 0
c8t1d0 ONLINE 0 0 0
c8t2d0 ONLINE 0 0 0
c8t3d0 ONLINE 0 0 0
c8t4d0 ONLINE 0 0 0
c8t5d0 ONLINE 0 0 0
c8t6d0 ONLINE 0 0 0
spare DEGRADED 0 0 0
c8t7d0 REMOVED 0 0 0
c8t11d0 ONLINE 0 0 0
c8t8d0 ONLINE 0 0 0
c8t9d0 ONLINE 0 0 0
c8t10d0 ONLINE 0 0 0
spares
c8t11d0 INUSE currently in use
Since it's not obvious, the spare line had both t7 and t11 indented under it.
When the resilver completed, I yanked the hard drive on target 7.
I'm assuming that t11 has the same content as t7, but that's not necessarily
clear from the output above.
So, now I'm left with the following config. I can't zfs remove t7, because
it's not a hot spare or a cache disk. I can't zfs replace t7 with t11, I'm
told that t11 is busy. And I didn't see any other zpool subcommands that look
likely to fix the problem.
Here are my system details:
SunOS datasrv1 5.11 snv_118 i86pc i386 i86xpv Solaris
This system is currently running ZFS pool version 16.
Pool 'tank' is already formatted using the current version.
How do I tell the system that t11 is the replacement for t7, and how to I then
add t7 as the hot spare (after I replace the disk)?
Thanks
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