# assuming the following:

# first (ie. non-raid) scsi disk    : /dev/da0

# second (ie. future raid) scsi disk: /dev/da1

# geom mirror device (whole disk)   : /dev/mirror/gm0



# make sure the second disk is treated as a really fresh one

# (not really necessary, but makes procedure more deterministically ;-)

dd if=/dev/zero of=/dev/da1 bs=512 count=79



# forget the whole PC MBR fdisk stuff, it simply doesn't exist on sparc :-)



# place a GEOM mirror label onto the second disk

gmirror label -v -n -b round-robin gm0 /dev/da1



# activate GEOM mirror kernel layer

# (makes the /dev/mirror/gm0 device available)

gmirror load



# place a BSD disklabel onto /dev/mirror/gm0

# (ATTENTION: in FreeBSD 6-current as of march 7 2006

# /dev/mirror/gm0 device has to be specified as just "mirror/gm0"!)

# (NOTICE: figure out what partitions you want with "sunlabel da0" before)

# (NOTICE: *no* partition offset is requiered at all for "a" partition!)

sunlabel -w -B mirror/gm0 auto      # initialize

sunlabel -e mirror/gm0              # create custom partitions



# manually copy filesystem data from first to to second disk

# (same procedure for partitions "g", etc)

# (NOTICE: in my sample a have a single partition containing the / fs,

#  just extend as needed if you have/need more partitions for /usr, etc)

newfs -U /dev/mirror/gm0a

mount /dev/mirror/gm0a /mnt

dump -L -0 -f- / | (cd /mnt; restore -r -v -f-)



# adjust new system configuration for GEOM mirror based setup

cp -p /mnt/etc/fstab /mnt/etc/fstab.orig

sed -e 's/dev/da0/dev/mirror/gm0/g' /mnt/etc/fstab

echo 'swapoff="YES"' >>/mnt/etc/rc.conf # for 5.3-RELEASE only

echo 'geom_mirror_load="YES"' >>/mnt/boot/loader.conf



# **** ATTENTION ****

# You may try this step at your own risk. However there is a chance

# that it wont work with you either!

#

# As of my understanding, this step is only possible on the intel

# plattform, where a special boot loader is stored inside the MBR.

# This boot loader does not exist on Sparc64, as Sun OpenBoot will

# call the boot loader directly from the primary partition at offset 0.

# I could only get this working by instructing OpenBoot manually to

# boot from the second disk.

#

# So after shutdown make sure to enter OpenBoot and start manually

# from the second disk.

# **** ATTENTION ****

#

# instruct boot stage 2 loader on first disk to boot

# with the boot stage 3 loader from the second disk

# (mainly because BIOS might not allow easy booting from second ATA disk

# or at least requires manual intervention on the console)

# echo "1:da(1,a)/boot/loader" >/boot.config



# reboot system

# (for running system with GEOM mirror on second disk)

shutdown -r now



# make sure the first disk is treated as a really fresh one

# (also not really necessary, but makes procedure more deterministically ;-)

dd if=/dev/zero of=/dev/da0 bs=512 count=79



# forget the whole PC MBR fdisk stuff, it simply doesn't exist on sparc :-)



# switch GEOM mirror to auto-synchronization and add first disk

# (first disk is now immediately synchronized with the second disk content)

gmirror configure -a gm0

gmirror insert gm0 /dev/da0



# wait for the GEOM mirror synchronization to complete

sh -c 'while [ ".`gmirror list | grep SYNCHRONIZING`" != . ]; do sleep 1; done'



# reboot into the final two-disk GEOM mirror setup

# (now actually boots with the MBR and boot stages on first disk

# as it was synchronized from second disk)

shutdown -r now