Date: Sat, 23 Oct 2010 09:56:43 +0100 From: Karl Pielorz <kpielorz_lst@tdx.co.uk> To: Pete French <petefrench@ticketswitch.com>, fjwcash@gmail.com, wjw@digiware.nl Cc: freebsd-fs@freebsd.org Subject: Re: ZFS 'read-only' device / pool scan / import? Message-ID: <F92BF0095A701A7CC2045894@Octa64> In-Reply-To: <E1P8W1Q-0004Y2-7Z@dilbert.ticketswitch.com> References: <E1P8W1Q-0004Y2-7Z@dilbert.ticketswitch.com>
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--On 20 October 2010 11:35 +0100 Pete French <petefrench@ticketswitch.com>
wrote:
> You can do a forced export - as long as the system doesnt think
> the pool is imported then an import will go looking. I made a
> similar mess of my drives the first time I changed discs oover, and I
> also didnt know about the import/export trick. But since then I
> have used iit every time I have got into trouble and it has always
> worked for me.
As a follow up to this - we tried to reproduce the original problem once
we'd restored the data. We removed a drive - rebooted, and got 'a mess':
"
NAME STATE READ WRITE CKSUM
vol UNAVAIL 0 0 0 insufficient replicas
mirror ONLINE 0 0 0
da1 ONLINE 0 0 0
da2 ONLINE 0 0 0
da3 UNAVAIL 0 0 0 corrupted data
mirror UNAVAIL 0 0 0 insufficient replicas
da4 FAULTED 0 0 0 corrupted data
da5 FAULTED 0 0 0 corrupted data
da6 FAULTED 0 0 0 corrupted data
mirror UNAVAIL 0 0 0 insufficient replicas
da7 FAULTED 0 0 0 corrupted data
da8 FAULTED 0 0 0 corrupted data
da9 FAULTED 0 0 0 corrupted data
mirror UNAVAIL 0 0 0 insufficient replicas
da10 FAULTED 0 0 0 corrupted data
da11 FAULTED 0 0 0 corrupted data
"
Doing a zpool export, then a zpool import (which required '-f' to get past
"cannot import 'vol': pool may be in use from other system use '-f' to
import anyway")
Seems to have done the trick:
"
vol ONLINE
mirror ONLINE
da1 ONLINE
da2 ONLINE
da4 ONLINE
mirror ONLINE
da5 ONLINE
da6 ONLINE
da7 ONLINE
mirror ONLINE
da8 ONLINE
da9 ONLINE
da10 ONLINE
mirror ONLINE
da11 ONLINE
da12 ONLINE
"
We now just have to re-attach the missing da3 to the last mirror set...
Thanks to all who replied - this has now all been written up in that
machines notes,
Regards,
-Karl
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