Mirroring Root Disk with DiskSuite - mirror_root Shell Script

I wrote this script now almost decade ago, and actually had to use it the other day. Love it when that happens...

On Solaris 2.6 (With DiskSuite installed), 7, 8, 9 and 10 this will mirror your root disk to another using disksuite and then reboot the box to attach the mirror.



#!/usr/bin/ksh
#
# Purpose: Script to mirror root disk using Solstice Disksuite.
# Rob Brown 14/05/2001
#
ROOTDISK=$1
ROOTMIRROR=$2
METADBSLICE=$3
PATH=$PATH:/usr/opt/SUNWmd/sbin:/usr/dt/bin:/usr/openwin/bin:/bin:/usr/bin:/usr/ucb:/usr/sbin:/usr/openwin/bin

#
# Sanity Chk. Ensure Binaries exist and
# determine Paths to them. Also ensure no
# disksuite metadb's have been configured.
# Check users has sufficent permissions and check
# they are frood enough to continue.
#

#
# Configure Paths
#
if [ -f /usr/opt/SUNWmd/sbin/metastat ]; then
METASTAT=/usr/opt/SUNWmd/sbin/metastat
METADB=/usr/opt/SUNWmd/sbin/metadb
METAINIT=/usr/opt/SUNWmd/sbin/metainit
METATTACH=/usr/opt/SUNWmd/sbin/metattach
METAROOT=/usr/opt/SUNWmd/sbin/metaroot
MDTAB=/etc/opt/SUNWmd/md.tab

elif [ -f /usr/sbin/metastat ]; then
METASTAT=/usr/sbin/metastat
METADB=/usr/sbin/metadb
METAINIT=/usr/sbin/metainit
METATTACH=/usr/sbin/metattach
METAROOT=/usr/sbin/metaroot
MDTAB=/etc/lvm/md.tab

else
echo No Disksuite binaries found. Please ensure it is installed.
exit 1
fi


#
# Do Any metadbs already exist?
#
${METADB} > /dev/null
if [ "$?" -ne "1" ]
then
echo "Metadb's may exist, or funny return code from metadb. Please clear down before rerunning ${0}."
exit 1
fi


#
# Is user root?
#
ID=`id`
USER=`expr "${ID}" : 'uid=\([^(]*\).*'`

if [ "${USER}" != "0" ]; then
echo "You must be root to run $0"
exit 1
fi


#
# Are Disk variables populated?
#
if [ "${ROOTDISK}" = "" ] || [ "${ROOTMIRROR}" = "" ] || [ "${METADBSLICE}" = "" ]; then
echo "Information missing: "
echo "Usage: $0 rootdisk rootmirror metadbslice"
echo "e.g. ${0} c1t0d0 c1t1d0 s7"
exit 1
fi



#
# Main
#
echo "Backing up old system/vfstab..."
cp /etc/vfstab /etc/vfstab.pre-`basename ${0}`
cp /etc/system /etc/system.pre-`basename ${0}`


#
# Write vtoc and check, bomb out on any errors.
#
echo "Writing ${ROOTDISK}'s vtoc ---> ${ROOTMIRROR}..."
prtvtoc /dev/rdsk/${ROOTDISK}s2 > /tmp/root-vtoc
fmthard -s /tmp/root-vtoc /dev/rdsk/${ROOTMIRROR}s2

FMTHARD_RTN=${?}
if [ "${FMTHARD_RTN}" -ne "0" ]; then
echo "Error Writing the vtoc from ${ROOTDISK} to ${ROOTMIRROR}, are they"
echo "the same type/size of disk?? Exiting."
exit
fi

echo "Creating MetaDatabases..."
${METADB} -a -c 3 -f ${ROOTDISK}${METADBSLICE}
${METADB} -a -c 3 -f ${ROOTMIRROR}${METADBSLICE}

echo "Meta DataBase: "
${METADB}

for SLICE in `cat /tmp/root-vtoc |grep -v '*' |awk '{print $1}'`
do
if [ ${SLICE} -eq "2" ] || [ ${SLICE} -eq `echo ${METADBSLICE} |cut -c2` ]
then
echo Not Touching slice ${SLICE} as it is either the MetaDB or the backup Slice.
else
echo Creating Sub Disks and Mirroring Slice ${SLICE}
MD_ROOT="d`expr ${SLICE} + 10`"
MD_MIRR="d`expr ${SLICE} + 20`"
MD_MIRROBJECT=d${SLICE}
${METAINIT} -f ${MD_ROOT} 1 1 ${ROOTDISK}s${SLICE}
${METAINIT} ${MD_MIRR} 1 1 ${ROOTMIRROR}s${SLICE}
${METAINIT} ${MD_MIRROBJECT} -m ${MD_ROOT}

echo "${METATTACH} ${MD_MIRROBJECT} ${MD_MIRR}" >> /etc/rc3.d/S98finish_mirror

cp /etc/vfstab /etc/vfstab.pre_rootmirror
cp /etc/vfstab /tmp/vfstab

if [ ${SLICE} -eq "0" ]
then
${METAROOT} ${MD_MIRROBJECT}
else
# Need to change entry in vfstab
echo "Altering the vfstab..."
cat /etc/vfstab |sed -e "s/\/dsk\/${ROOTDISK}s${SLICE}/\/md\/dsk\/${MD_MIRROBJECT}/" > /tmp/vfstab
cp /tmp/vfstab /etc/vfstab
cat /etc/vfstab |sed -e "s/\/rdsk\/${ROOTDISK}s${SLICE}/\/md\/rdsk\/${MD_MIRROBJECT}/" > /tmp/vfstab
cp /tmp/vfstab /etc/vfstab
fi
fi
done

# Create md.tab, and make the finish_mirror script runable at next boot.
echo "${METASTAT} -p >> ${MDTAB}" >> /etc/rc3.d/S98finish_mirror
echo "/usr/bin/rm /etc/rc3.d/S98finish_mirror" >> /etc/rc3.d/S98finish_mirror
chmod 755 /etc/rc3.d/S98finish_mirror

echo "This system must now be rebooted, to attach new mirrors."