If you are having touble booting to the mirrored drive, the following is what
we had to do to correctly boot off the mirrored drive in a Thumper mirrored
with disksuite. The root drive is c5t0d0 and the mirror is c5t4d0. The BIOS
will try those 2 drives.
Just a note, if it ever switches to c5t4d0 as the primary boot device, the BIOS
will not swap back autoamtically. You will have to change this back by hand in
the BIOS. Mostly likely you'll find this out on your next OS upgrade when you
upgrade c5t0d0 only to still be booting off c5t4d0.
The vtoc.out file was created with prtvtoc on the primary root drive.
and the partitions were added to SVM and synced one by one in a for loop.
MIRROR=c5t4d0
echo "y" | /usr/sbin/fdisk -B /dev/rdsk/${MIRROR}s2
echo "5" | /usr/sbin/fdisk -b /usr/lib/fs/ufs/mboot /dev/rdsk/${MIRROR}p0
/usr/sbin/fmthard -s /tmp/disk-vtoc.out /dev/rdsk/${MIRROR}s2
/sbin/installgrub /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/${MIRROR}s0
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