Thanks for your thorough research! >My theory is that OpenSolaris was > installed on c8t0d0 at some point and then it was > reinstalled on c8t5d0.
Ah, that would make sense. I have reinstalled opensolaris a few times. I thought I was installing on the same drive each time, but apparently this is not the case. I went ahead and reinstalled it -again-, because I have a sneaky suspicion I've been booting/making changes to both drives without even knowing it. This time I deleted the partitions on every drive, so there was no confusion. Once the drives were mirrored, I disconnected c8t0d0 while the system was running to see if c8t1d0 would take over - it did! However, when I try to boot with just c8t1d0, it hangs after this point: "Loading kmdb... SunOS Release 5.11 Version svn_134 64-bit Copyright 1983-2010 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. NOTICE: Kernel debugger present: disabling console power management. Hostname: zfs_fileserver _" I'm not sure what's wrong here. Maybe I didn't copy over the VTOC correctly? Here are the rest of the commands I used: geoff at zfs_fileserver:~$ pfexec prtvtoc /dev/rdsk/c8t0d0s2 | pfexec fmthard -s - /dev/rdsk/c8t1d0s2 fmthard: New volume table of contents now in place. geoff at zfs_fileserver:~$ pfexec zpool attach -f rpool c8t0d0s0 c8t1d0s0 Please be sure to invoke installgrub(1M) to make 'c8t1d0s0' bootable. Make sure to wait until resilver is done before rebooting. geoff at zfs_fileserver:~$ pfexec installgrub -m /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c8t1d0s0 Updating master boot sector destroys existing boot managers (if any). continue (y/n)?y stage1 written to partition 0 sector 0 (abs 16065) stage2 written to partition 0, 273 sectors starting at 50 (abs 16115) stage1 written to master boot sector geoff at zfs_fileserver:~$ zpool status pool: rpool state: ONLINE scrub: resilver completed after 0h10m with 0 errors on Thu Mar 18 16:14:43 2010 config: NAME STATE READ WRITE CKSUM rpool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 c8t0d0s0 ONLINE 0 0 0 c8t1d0s0 ONLINE 0 0 0 11.1G resilvered errors: No known data errors -- This message posted from opensolaris.org
