From owner-freebsd-fs@FreeBSD.ORG  Sun Apr 24 09:51:56 2011
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Date: Sun, 24 Apr 2011 11:49:47 +0200
From: Pawel Tyll <ptyll@nitronet.pl>
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To: Konstantin Kuklin <konstantin.kuklin@gmail.com>
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Cc: freebsd-fs@freebsd.org, zfs-discuss@opensolaris.org, pjd@freebsd.org
Subject: Re: zfs problem vdev I/O failure
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Hi Konstantin,

> zpool status:
> Flash# zpool status
>   pool: zroot
>  state: DEGRADED
> status: One or more devices are faulted in response to IO failures.
> action: Make sure the affected devices are connected, then run 'zpool
> clear'.
>    see: http://www.sun.com/msg/ZFS-8000-HC
>  scrub: resilver in progress for 0h6m, 0.00% done, 1582566h29m to go
> config:

>         NAME                     STATE     READ WRITE CKSUM
>         zroot                    DEGRADED    12     0     1
>           mirror                 DEGRADED    36     0     4
>             7159451150335751026  UNAVAIL      0     0     0  was
> /dev/gpt/disk0
>             gpt/disk1            ONLINE       0     0    40

> errors: 12 data errors, use '-v' for a list

> Zpool scrub freeze and time to resilver up in time...
> How i can repair it, if zpool scrub -s zroot and detach don`t work...and
> don`t work all of zfs commands =\

Try booting mfsBSD and fixing there, http://mfsbsd.vx.sk/

http://mfsbsd.vx.sk/iso/mfsbsd-8.2-zfsv28-i386.iso
http://mfsbsd.vx.sk/iso/mfsbsd-se-8.2-zfsv28-amd64.iso