zfs discuss - Jan 2008 - zpool attach problem

On a V240 running s10u4 (no additional patches), I had a pool which looked like
this:

<pre>
> # zpool status
>   pool: pool01
>  state: ONLINE
>  scrub: none requested
> config:
> 
>         NAME                                       STATE     READ WRITE
CKSUM
>         pool01                                     ONLINE       0     0    
0
>           mirror                                   ONLINE       0     0    
0
>             c8t600C0FF000000000082668310F838000d0  ONLINE       0     0    
0
>             c8t600C0FF00000000007E4BE4C38F4ED00d0  ONLINE       0     0    
0
>           mirror                                   ONLINE       0     0    
0
>             c8t600C0FF00000000008266812A0877700d0  ONLINE       0     0    
0
>             c8t600C0FF00000000007E4BE2BEDBC9600d0  ONLINE       0     0    
0
> 
> errors: No known data errors
</pre>

Since this system is not in production yet, I wanted to do a little disk
juggling as follows:

<pre>
> # zpool detach pool01 c8t600C0FF00000000007E4BE4C38F4ED00d0
> # zpool detach pool01 c8t600C0FF00000000007E4BE2BEDBC9600d0
</pre>

New pool status:

<pre>
> # zpool status
>   pool: pool01
>  state: ONLINE
>  scrub: none requested
> config:
> 
>         NAME                                     STATE     READ WRITE CKSUM
>         pool01                                   ONLINE       0     0     0
>           c8t600C0FF000000000082668310F838000d0  ONLINE       0     0     0
>           c8t600C0FF00000000008266812A0877700d0  ONLINE       0     0     0
> 
> errors: No known data errors
</pre>

Finally, I wanted to re-establish mirrors, but am seeing the following errors:

<pre>
> # zpool attach pool01 c8t600C0FF00000000008266812A0877700d0
c8t600C0FF00000000007E4BE4C38F4ED00d0
> cannot attach c8t600C0FF00000000007E4BE4C38F4ED00d0 to
c8t600C0FF00000000008266812A0877700d0: device is too small
> # zpool attach pool01 c8t600C0FF000000000082668310F838000d0
c8t600C0FF00000000007E4BE2BEDBC9600d0
> cannot attach c8t600C0FF00000000007E4BE2BEDBC9600d0 to
c8t600C0FF000000000082668310F838000d0: device is too small
</pre>

Is this expected behavior? The ''zpool'' man page says:

If device is not currently part of a mirrored configuration,  device
automatically  transforms  into a two-way  mirror of device and new_device.

But, this isn''t what I''m seeing . . . did I do something
wrong?

Here''s the format output for the disks:

<pre>
       4. c8t600C0FF00000000007E4BE2BEDBC9600d0 &lt;SUN-StorEdge
3510-421F-545.91GB&gt;
          /scsi_vhci/ssd at g600c0ff00000000007e4be2bedbc9600
       5. c8t600C0FF00000000007E4BE4C38F4ED00d0 &lt;SUN-StorEdge
3510-421F-545.91GB&gt;
          /scsi_vhci/ssd at g600c0ff00000000007e4be4c38f4ed00
       6. c8t600C0FF00000000008266812A0877700d0 &lt;SUN-StorEdge
3510-421F-545.91GB&gt;
          /scsi_vhci/ssd at g600c0ff00000000008266812a0877700
       7. c8t600C0FF000000000082668310F838000d0 &lt;SUN-StorEdge
3510-421F-545.91GB&gt;
          /scsi_vhci/ssd at g600c0ff000000000082668310f838000
</pre>

Rob
 
 
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