[OpenIndiana-discuss] import of pool fails, due to changed device path?

[Ong Yu-Phing]

I have an interesting situation where an upgrade of OI 151a3 is unable 
to import my pool, yet booting into a live USB allows access to the pool 
without problems.

The zpool import fails with this sort of message:
         pool1       UNAVAIL  insufficient replicas
           mirror-0  UNAVAIL  corrupted data
             c3t0d0  ONLINE
             c3t1d0  ONLINE

When I check the disk labels on the disks:

zdb -l /dev/dsk/c3t0d0s0
--------------------------------------------
LABEL 0
--------------------------------------------
     version: 28
     name: 'pool1'
     state: 1
     txg: 7173951
     pool_guid: 8370873525947507187
     hostid: 13162267
     hostname: 'openindiana'
     top_guid: 15064987019855796782
     guid: 4751459059166773513
     vdev_children: 3
     vdev_tree:
         type: 'mirror'
         id: 0
         guid: 15064987019855796782
         metaslab_array: 30
         metaslab_shift: 34
         ashift: 9
         asize: 1998985625600
         is_log: 0
         create_txg: 4
         children[0]:
             type: 'disk'
             id: 0
             guid: 4751459059166773513
             path: '/dev/dsk/c2t0d0s0'
             devid: 'id1,sd at n600605b002e26410183d783b0e56515a/a'
             phys_path: '/pci at 0,0/pci8086,3410 at 9/pci1014,3c7 at 0/sd at 0,0:a'
             whole_disk: 1
             DTL: 4119
             create_txg: 4
         children[1]:
             type: 'disk'
             id: 1
             guid: 7277976899319815787
             path: '/dev/dsk/c2t1d0s0'
             devid: 'id1,sd at n600605b002e264101839b39f123c1210/a'
             phys_path: '/pci at 0,0/pci8086,3410 at 9/pci1014,3c7 at 0/sd at 1,0:a'
             whole_disk: 1
             DTL: 4118
             create_txg: 4

So I noticed that even though the disk is c3t0d0, the path shows in the 
disk label as c2t0d0s0 (and similarly for the "child"/partner mirrored 
disk, c3t1d0, yet path shows as c2t1d0), is this what is causing the 
really strange behaviour, when even though the devices are considered 
ONLINE, the pool itself is UAVAIL?  And if so, is there any way to fix 
this?

Thanks.