Problems replacing failing drive in ZFS pool
Garrett Moore
garrettmoore at gmail.com
Mon Jul 19 15:33:43 UTC 2010
Oops - shouldn't have forgotten that, sorry.
FreeBSD leviathan 8.0-RELEASE FreeBSD 8.0-RELEASE #0: Sat Nov 21
15:02:08 UTC 2009
root at mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
On Mon, Jul 19, 2010 at 11:24 AM, Jeremy Chadwick
<freebsd at jdc.parodius.com>wrote:
> 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
> > booting
> > 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:
> > Code:
> >
> > 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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