mirrors the root disk cleanly and safely!

#! /bin/sh

#

# mirrorRoot - mirrors the root disk cleanly and safely

#

################################################################

# Author: Todd Stansell

# $Id: mirrorRoot,v 1.21 2004-02-01 03:40:20-08 todd Exp $

#

# Notes:

#

# 1) I use vxprint -F ... throughout this script because of the

# fact that vxprint -ht output is not consistent between versions.

# Version 3.1 adds information about replication (since it's

# now integrated). Anyway, by pulling only the information

# I need, I can be sure it will work without regard to version.

#

# 2) status codes of all veritas commands are documented in the

# vxintro manpage.

#

# 3) versions previous to 1.18 don't deal with the Block0

# subdisk correctly for VxVM 3.5. So, make sure you're

# using version 1.18 or newer. You wouldn't see this

# message if you weren't, though.

#

################################################################

#! /bin/sh

#

# mirrorRoot - mirrors the root disk cleanly and safely

#

################################################################

# Author: Todd Stansell

# $Id: mirrorRoot,v 1.21 2004-02-01 03:40:20-08 todd Exp $

#

# Notes:

#

# 1) I use vxprint -F ... throughout this script because of the

# fact that vxprint -ht output is not consistent between versions.

# Version 3.1 adds information about replication (since it's

# now integrated). Anyway, by pulling only the information

# I need, I can be sure it will work without regard to version.

#

# 2) status codes of all veritas commands are documented in the

# vxintro manpage.

#

# 3) versions previous to 1.18 don't deal with the Block0

# subdisk correctly for VxVM 3.5. So, make sure you're

# using version 1.18 or newer. You wouldn't see this

# message if you weren't, though.

#

################################################################

mirror_dev="c0t1d0"

mirror_name="rootdisk2"

verbose=0

c_opt=false

setswaponly=false

PATH=$PATH:/usr/sbin:/etc/vx/bin

PROG=`basename `

USAGE="usage: $PROG [-hvc] [ [-s] | [-n name] [-d device] ]

-h help

-s create swap slices and configure dump device only

-v increase verbosity level (two -v's for max)

-c show vx commands as they are run

-n name disk access name of mirror disk (default is $mirror_name)

-d device device used to mirror onto (default is $mirror_dev)"

#

# kills off any processes that are running in the background

#

cleanup() {

vxtask abort $PROG

}

#

# echo a message if we want vx command verbosity

#

show() { [ $c_opt ] && /bin/echo "# $@" ; }

#

# echo a message if we want verbosity

#

msg() { [ $verbose -ge 1 ] && /bin/echo "$@" ; }

#

# usage: showstatus $value $prog $msg

#

showstatus() {

status=""

prog=""

if [ $status -ne 0 ] ; then

echo "" >&2

echo " $prog exited with status $status" >&2

exit $status

fi

}

#

# Check to see that $device has at least $size sectors

# usage: check_size $device $size

#

check_size() {

len=`vxprint -e 'sd && sd_disk="'$dm_of_rootvol'" && p0 = "PRIVATE"' -F "%len" | awk 'END{print ''-a}'`

pub_len=`vxdisk list | awk -F= '/^public:/ {print $NF}'`

if [ $pub_len -lt $len ] ; then

echo "$mirror_dev is only $pub_len sectors, while" >&2

echo "$dm_of_rootvol uses $len sectors. Please choose a larger disk." >&2

exit 7

fi

}

#

# usage: initdisk $device

#

initdisk() {

dev=

# see if we need the old_layout option to vxdisksetup. This

# is required if we have a fully-utilized disk that has been

# encapsulated, so that only 1 cylinder is used for the private

# region, and the new disk will have enough public space to

# mirror everything to. If you don't want it to use this option,

# then initialize the disk before running this script.

opt=""

if grep old_layout /etc/vx/bin/vxdisksetup >/dev/null ; then

opt="old_layout"

fi

msg "Initializing $dev for use with volume manager"

show "vxdisksetup -i $dev $opt"

vxdisksetup -i $dev $opt; status=$?

showstatus $status vxdisksetup "Could not initialize $dev"

}

#

# adds a device ($dev) to a disk group ($dg) with specified media name ($dm)

#

# usage: add_to_dg $dev $dm [$dg]

#

add_to_dg() {

dg=rootdg

dev=

dm=

[ "" ] && dg=

msg "Adding $dev to $dg as $dm"

show "vxdg -g $dg adddisk $dm=$dev"

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