Date: Sun, 12 Feb 2012 12:36:42 +0000 From: Matthew Seaman <matthew@FreeBSD.org> To: freebsd-fs@FreeBSD.org Subject: Re: ZFS Snapshot problems Message-ID: <4F37B25A.10002@FreeBSD.org> In-Reply-To: <4F37A8E7.7060102@brockmann-consult.de> References: <4F377457.4080807@FreeBSD.org> <20120212084052.GA43095@icarus.home.lan> <4F3789C1.9000903@FreeBSD.org> <4F37A8E7.7060102@brockmann-consult.de>
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On 12/02/2012 11:56, Peter Maloney wrote:
> I had a problem where I could not delete, rename, send, etc. a
> snapshot... , (possibly caused by a kernel panic during a zfs
> replication). Maybe yours is related. I did not try viewing the contents
> of my snapshot.
>
> If it is related, the solution is:
>
> zdb -d poolname | grep %
>
> Expect the command to take long, and output should include all your
> clones you made, plus some "Input/output errors" for some others. Pay
> attention to the ones with errors, and then delete those, then try to
> access your snapshot again.
Interesting. I guess this is not the expected output?
lucid-nonsense:/usr/home/matthew:# zpool list
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT
zroot 448G 42.9G 405G 9% 1.20x ONLINE -
lucid-nonsense:/usr/home/matthew:# zdb -d zroot | grep %
zdb: can't open 'zroot': No such file or directory
Running truss(1) on zdb shows:
open("/dev/gpt/disk0",O_RDONLY,00) ERR#2 'No such file or directory'
open("/dev/gpt/disk2",O_RDONLY,00) ERR#2 'No such file or directory'
which is true -- /dev/gpt is empty. But disk0 and disk1 should show up:
lucid-nonsense:/usr/home/matthew:# gpart show -l /dev/ad0
=> 34 976773101 ad0 GPT (465G)
34 128 1 (null) (64k)
162 33554432 2 swap0 (16G)
33554594 943218541 3 disk0 (449G)
lucid-nonsense:/usr/home/matthew:# gpart show -l /dev/ad2
=> 34 976773101 ad2 GPT (465G)
34 128 1 (null) (64k)
162 33554432 2 swap2 (16G)
33554594 943218541 3 disk2 (449G)
... and come to think of it: the disk0 and disk2 labels used to show up
here too:
lucid-nonsense:/usr/home/matthew:# zpool status zroot
pool: zroot
state: ONLINE
scan: scrub repaired 0 in 3h35m with 0 errors on Sun Feb 12 11:14:10 2012
config:
NAME STATE READ WRITE CKSUM
zroot ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
gptid/848287e9-5f8e-11df-808e-e0cb4e266481 ONLINE 0 0 0
gptid/a6d0bec4-5f8e-11df-808e-e0cb4e266481 ONLINE 0 0 0
errors: No known data errors
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil.
PGP: http://www.infracaninophile.co.uk/pgpkey
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