[pca] zpool unavailable after Kernel Patch 142909-17

[Dennis Clarke]

> Hello,
>
> just a warning and perhaps a request for some advices.
>
> We have a Sun StorEdge SE3510 connected to a V240. This Raid is used as
> JBOD (12 independend disks, 5x2 mirrored, 2 spares) for ZFS and Patch
> testings.
> I have 2 pools, one on this array, another on 2 local scsi-disks.
>
> After installing all current patches I can't mount the pool on the Raid,
> the local one works. The disks are seen with format, zpool status
> (actually zpool import) gives:
> root at nftp:/>zpool import
>   pool: tank
>     id: 10696630212093874974
>  state: UNAVAIL
> status: The pool is formatted using an older on-disk version.
> action: The pool cannot be imported due to damaged devices or data.
> config:
>
>         tank         UNAVAIL  insufficient replicas
>           mirror-0   UNAVAIL  corrupted data
>             c2t40d0  ONLINE
>             c2t40d1  ONLINE
>           mirror-1   UNAVAIL  corrupted data
>             c2t40d3  ONLINE
>             c2t40d2  ONLINE
>           mirror-2   UNAVAIL  corrupted data
>             c2t40d4  ONLINE
>             c2t40d5  ONLINE
>           mirror-3   UNAVAIL  corrupted data
>             c2t40d6  ONLINE
>             c2t40d7  ONLINE
>           mirror-4   UNAVAIL  corrupted data
>             c2t40d8  ONLINE
>             c2t40d9  ONLINE
> root at nftp:/>

Fascinating.

This looks like an undocumented change in the way a zpool status is
reported. I see the same thing here :

$ uname -a
SunOS mercury 5.10 Generic_142909-17 sun4u sparc SUNW,Sun-Blade-2500
$
$ zpool status
  pool: mercury_rpool
 state: ONLINE
status: The pool is formatted using an older on-disk format.  The pool can
        still be used, but some features are unavailable.
action: Upgrade the pool using 'zpool upgrade'.  Once this is done, the
        pool will no longer be accessible on older software versions.
 scrub: resilver completed after 0h0m with 0 errors on Wed Sep 29 17:26:25
2010
config:

        NAME          STATE     READ WRITE CKSUM
        mercury_rpool  ONLINE       0     0     0
          mirror-0    ONLINE       0     0     0
            c3t0d0s0  ONLINE       0     0     0
            c1t2d0s0  ONLINE       0     0     0  6.74M resilvered


See "mirror-0" ? I didn't do that.

Too bad the sources for zpool status are not open anymore :-(

Dennis