Date: Mon, 19 Jul 2010 08:24:16 -0700 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Garrett Moore <garrettmoore@gmail.com> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: Problems replacing failing drive in ZFS pool Message-ID: <20100719152416.GA14324@icarus.home.lan> In-Reply-To: <AANLkTimOrwHe7xiwoap2H2mUtA7vU6TjENkPC4yJ02_z@mail.gmail.com> References: <AANLkTimOrwHe7xiwoap2H2mUtA7vU6TjENkPC4yJ02_z@mail.gmail.com>
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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@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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