#!/bin/ksh

# Authors:	Peter Bousfield <peter.bousfield at mocat.com.au>, Carl Marino <cmarino at group14.co.uk>
# Date:		Fri Sep  6 15:13:45 BST 2002
# Version:	1.1
# Description:	This program is used to change the diskids and dgid of a given diskgroup.  You will
#		want to do this after taking a BCV copy to ensure that there are not id conflicts.
#		Note diskgroup must be already imported (to get disk group info), and must be able
#		to be deported (ie. volumes not in use, no file systems mounted).

Me=${0##*/}
FILE="/var/tmp/${Me}-$$"
PATH=/usr/sbin:/bin
DG=$1

if [[ -z ${DG} ]] ; then
	print -u2 "Usage: ${Me} diskgroup"
	exit 1
fi
print "Changing disk/group ID of ${DG} ..."

vxprint -g ${DG} -hmvps > ${FILE}
if [[ ! -s ${FILE} ]] ; then
	print -u2 "\nERROR - no configuration in ${FILE} - aborting!"
	exit 1
fi

print "\nRecreating ${DG} disks with existing regions"
set -A CTD  $(vxprint -g ${DG} -dF '%assoc')
set -A NAME $(vxprint -g ${DG} -dF '%name')
vxdg deport ${DG}
(( i = 0 ))
while (( $i < ${#CTD[*]} )); do
	print "\t- initializing ${CTD[$i]}"
	vxdisk -f init ${CTD[$i]} $(vxdisk list ${CTD[$i]} | nawk '/^public:/ {printf("pub%s pub%s ", $3, $4)} /^private:/ {printf("priv%s priv%s", $3, $4)}')
	(( i = $i + 1 ))
done

print "\nRecreating ${DG} with ${CTD[0]} as ${NAME[0]}"
vxdg init ${DG} ${NAME[0]}=${CTD[0]}
(( i = 1 ))
while (( $i < ${#CTD[*]} )); do
	print "\t- adding disk ${CTD[$i]} as ${NAME[$i]}"
	vxdg -g ${DG} adddisk ${NAME[$i]}=${CTD[$i]}
	(( i = $i + 1 ))
done

print "\nRecreating ${DG} configuration"
vxmake -g ${DG} -d ${FILE}
for vol in $(vxprint -g ${DG} -vF %name) ; do
	print "\t- initializing volume ${vol}"
	vxvol -g ${DG} init active ${vol}
done 

print "\n${Me} complete.  Please check and then remove ${FILE}."
exit 0