Problems replacing failing drive in ZFS pool
freebsd at jdc.parodius.com
Mon Jul 19 15:24:19 UTC 2010
On Mon, Jul 19, 2010 at 11:21:38AM -0400, Garrett Moore wrote:
> I have an 8-drive ZFS array consisting of WD15EADS drives. One of my disks
> has started to fail, so I got a replacement disk. I have replaced a disk
> before by:
> zpool offline tank /dev/da5
> shutting down, swapping from old disk to new disk
> zpool replace tank /dev/da5
> This worked fine.
> This time the failing disk was da3, and I tried the same thing:
> zpool offline tank /dev/da3
> zpool status showed da3 offline.
> shut down, swapped old disk to new disk.
> When I booted again, I got:
> NAME STATE READ WRITE CKSUM
> tank UNAVAIL 0 0 0 insufficient replicas
> raidz1 UNAVAIL 0 0 0 corrupted data
> da0 ONLINE 0 0 0
> da1 ONLINE 0 0 0
> da2 ONLINE 0 0 0
> da3 ONLINE 0 0 0
> da4 ONLINE 0 0 0
> da5 ONLINE 0 0 0
> da6 ONLINE 0 0 0
> da7 ONLINE 0 0 0
> I switched back to the old disk and booted again and then I could access my
> data again, and da3 still showed as offline. I tried 'zpool online tank
> /dev/da3' and after a few seconds resilvering completed and all 8 drives are
> back online again, but with the 'dying' disk as da3 still.
> I tried shutting down WITHOUT first offlining /dev/da3, and swapping the
> disks, and when I booted I again got 'insufficient replicas'.
> Why am I getting this error, and how come it worked ok the last time I
> replaced a disk? And more importantly, how do I switch to my new replacement
> disk without losing data?
Can you please provide uname -a output? Thanks.
| Jeremy Chadwick jdc at parodius.com |
| Parodius Networking http://www.parodius.com/ |
| UNIX Systems Administrator Mountain View, CA, USA |
| Making life hard for others since 1977. PGP: 4BD6C0CB |
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