i have completed the upgrade of my server from snv_98 to snv_101b but had to 
detach
the mirror (c7t3d0s0) in order to activate the boot environment. the status 
prior to the
OpenSolaris upgrade is attached at the end of this email. the error i am seeing 
follows:

jupiter:/rpool/boot/grub# zpool attach rpool c7t2d0s0 c7t3d0s0
cannot open '/dev/dsk/c7t3d0s0': I/O error

- detaching the rpool mirror
jupiter:/rpool/boot/grub# zpool detach rpool c7t3d0s0
jupiter:/rpool/boot/grub# beadm activate opensolaris-2008.11-snv101b
jupiter:/rpool/boot/grub# beadm list
BE                                             Active Mountpoint Space  Policy 
Created
--                                               ------ ---------- -----  
------ -------
opensolaris                               -      -          8.35M  static 
2008-09-27 18:11
opensolaris-1                           N      /          74.67M static 
2008-09-28 10:34
opensolaris-2008.11-snv101b R      -          9.14G  static 2008-12-06 10:02
jupiter:/rpool/boot/grub#

- activating the new boot environment worked

i have verified the status of c7t3d0s0 and format:fdisk was used to change this
disk to use the Solaris2 partition.

AVAILABLE DISK SELECTIONS:
       0. c7t2d0 <DEFAULT cyl 17845 alt 2 hd 255 sec 63>
          /pci at 7b,0/pci1022,7458 at 11/pci1000,3060 at 2/sd at 2,0
       1. c7t3d0 <DEFAULT cyl 17845 alt 2 hd 255 sec 63>
          /pci at 7b,0/pci1022,7458 at 11/pci1000,3060 at 2/sd at 3,0
Specify disk (enter its number): 1
             Total disk size is 17848 cylinders
             Total disk size is 17848 cylinders
             Cylinder size is 16065 (512 byte) blocks

                                               Cylinders
      Partition   Status    Type          Start   End   Length    %
      =========   ======    ============  =====   ===   ======   ===
          1                 Solaris2          1  17847    17847    100

i have scrubbed the rpool

jupiter:/var/adm# zpool status
  pool: rpool
 state: ONLINE
 scrub: scrub completed after 0h7m with 0 errors on Sat Dec  6 13:03:11 2008
config:

        NAME        STATE     READ WRITE CKSUM
        rpool       ONLINE       0     0     0
       c7t2d0s0  ONLINE       0     0     0

errors: No known data errors

there are no FMA messages as reported by fmdump -e
jupiter:/rpool/boot/grub# fmdump -e
TIME                 CLASS
fmdump: /var/fm/fmd/errlog is empty

jupiter:/rpool/boot/grub# zpool attach rpool c7t2d0s0 c7t3d0s0
cannot open '/dev/dsk/c7t3d0s0': I/O error

the zpool history is attached for reference. this is probably something simple
i overlooked. thoughts/suggestions?
mike b.

jupiter:/rpool/boot/grub# zpool history
History for 'rpool':
2008-09-27.18:11:14 zpool create -f rpool c7t2d0s0
2008-09-27.18:11:16 zfs create rpool/ROOT
2008-09-27.18:11:17 zfs set compression=off rpool/ROOT
2008-09-27.18:11:20 zfs set mountpoint=/a/export rpool/export
2008-09-27.18:11:20 zfs set mountpoint=/a/export/home rpool/export/home
2008-09-27.19:42:34 zpool set bootfs=rpool/ROOT/opensolaris rpool
2008-09-27.19:42:37 zfs set mountpoint=/export/home rpool/export/home
2008-09-27.19:42:38 zfs set mountpoint=/export rpool/export
2008-09-27.19:43:15 zpool set bootfs=rpool/ROOT/opensolaris rpool
2008-09-27.19:43:47 zfs snapshot -r rpool at install
2008-09-27.23:44:37 zpool attach rpool c7t2d0s0 c7t3d0s0
2008-09-28.09:52:55 zpool detach rpool c7t3d0s0
2008-09-28.11:01:30 zpool attach rpool c7t2d0s0 c7t3d0s0
2008-10-02.22:46:13 zfs create rpool/javasig1
2008-10-02.22:46:35 zfs set quota=1G rpool/javasig1
2008-12-06.11:49:40 zpool detach rpool c7t3d0s0
2008-12-06.12:18:02 zpool upgrade rpool 13
2008-12-06.12:55:20 zpool scrub rpool

- rpool status prior to the upgrade

jupiter:/rpool/boot/grub# zpool status rpool
  pool: 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: none requested
config:

        NAME          STATE     READ WRITE CKSUM
        rpool         ONLINE       0     0     0
          mirror      ONLINE       0     0     0
            c7t2d0s0  ONLINE       0     0     0
            c7t3d0s0  ONLINE       0     0     0

errors: No known data errors
-- 
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