You want 'zpool attach' instead of 'zpool add'.  What the customer did
was add it back, but as a dynamic stripe instead of a second half of a
mirror.

And no, there is currently no way to remove a dynamically striped disk
from a pool.  We're working on it.

- Eric

On Wed, Jul 26, 2006 at 02:12:11PM -0400, Jeffrey Evans wrote:
> Customer created a pool with 2 disks that were mirrored.
> He then wanted to see what would happen if he destroyed the mirror.
> He offlined the disk c1t5d0 then "destroy" it.
> 
> Hi ZFS question.
> 
> He then added back to the pool with the intention of it replacing itself 
> as the mirror. However the pool doesn't seem to be a "mirror pool" any 
> more and once he onlined the disk he can't offline it.
> 
> 
> cpb0814:/> zpool status
>   pool: pool1
>  state: ONLINE
>  scrub: resilver completed with 0 errors on Tue Jul 25 15:16:49 2006
> config:
> 
>         NAME        STATE     READ WRITE CKSUM
>         pool1       ONLINE       0     0     0
>           c0t0d0    ONLINE       0     0     0  33.0K resilvered
>           c1t5d0    ONLINE       0     0     0
> cpb0814:/> zpool offline pool1 c1t5d0
> cannot offline /dev/dsk/c1t5d0: no valid replicas
> cpb0814:/>
> 
> I believe he is running into bug 6328632.
> My questions
> 1. How does he rectify it
> 2. What would be the proper way to add a replace a 2 disk mirror
>    Does the pool have to be destroyed and recreated ?
> 
> Any information would be helpful.
> 
> Thanks
> 
> Jeff
>      /\
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>    \ \\ /
>   / \/ / /   Jeff Evans - Technical Support Engineer
>  / /   \//\  email:    [EMAIL PROTECTED]
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--
Eric Schrock, Solaris Kernel Development       http://blogs.sun.com/eschrock
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