ZFS - Unable to offline drive in raidz1 based pool

[Pawel Jakub Dawidek]

On Sun, Sep 20, 2009 at 04:00:10PM -0600, Kurt Touet wrote:
> I am using ZFS pool based on a 4-drive raidz1 setup for storage.  I
> believe that one of the drives is failing, and I'd like to
> remove/replace it.  The drive has been causing some issues (such as
> becoming non-responsive and hanging the system with timeouts), so I'd
> like to offline it, and then run in degraded mode until I can grab a
> new drive (tomorrow).  However, when I disconnected the drive (pulled
> the plug, not using a zpool offline command), the following occurred:
> 
>         NAME        STATE     READ WRITE CKSUM
>         storage     FAULTED       0     0     1
>           raidz1    DEGRADED     0     0     0
>             ad14    ONLINE       0     0     0
>             ad6     UNAVAIL      0     0     0
>             ad12    ONLINE       0     0     0
>             ad4     ONLINE       0     0     0
> 
> Note: That's my recreation of the output... not the actual text.
> 
> At this point, I was unable to to do anything with the pool... and all
> data was inaccessible.  Fortunately, the after sitting pulled for a
> bit, I tried putting the failing drive back into the array, and it
> booted properly.  Of course, I still want to replace it, but this is
> what happens when I try to take it offline:
> 
> monolith# zpool status storage
>   pool: storage
>  state: ONLINE
>  scrub: none requested
> config:
> 
>         NAME        STATE     READ WRITE CKSUM
>         storage     ONLINE       0     0     0
>           raidz1    ONLINE       0     0     0
>             ad14    ONLINE       0     0     0
>             ad6     ONLINE       0     0     0
>             ad12    ONLINE       0     0     0
>             ad4     ONLINE       0     0     0
> 
> errors: No known data errors
> monolith# zpool offline storage ad6
> cannot offline ad6: no valid replicas

Could you send the output of:

	# apply "zdb -l /dev/%1" ad{4,6,12,14}

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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