ASM Metadata backup - 11G

We know that asm is full of metadata . It is advisable to backup the metadata ,incase if asm instance crash or issue with particalu diskgroups. 11gR1 includes the facility to take metadata backup and restore.

 md_backup and md_restore are asmcmd commands.

This script will help you to take metadata backup

dtm=`date +%d%m%y%H%M%S`
LOG_FILE=/tmp/asm_backup.${dtm}
rm /app/oracle/TEST/backup/export/asm_dg.backup
HOSTNAME=`hostname`
if [ -s /etc/oratab ] ; then
   ORATAB=/etc/oratab
elif [ -s /var/opt/oracle/oratab ] ; then
     ORATAB=/var/opt/oracle/oratab
elif [ -s /etc/opt/oracle/oratab ] ; then
     ORATAB=/etc/opt/oracle/oratab
else
     echo "ORATAB is missing" 2>&1 1>> $LOG_FILE
     cat $LOG_FILE
     exit 1
fi
cat ${ORATAB}|awk -F\# '{print $1}'|grep -v '^$'|awk -F\: '{print $1" "$2" "$3}' |while read ORACLE_SID ORACLE_HOME BOOT_FLAG
do
 if [ "${ORACLE_SID}" = "+ASM" -a "${BOOT_FLAG}" = "Y" ] ; then
  export ORACLE_SID
  export ORACLE_HOME
  export BOOT_FLAG
  PATH=$ORACLE_HOME/bin:$PATH
  export PATH
  asmcmd  lsdg
 asmcmd  md_backup -b /app/oracle/TEST/backup/export/asm_dg.backup #ASMCMD> md_restore -t full -g RECOVER /tmp/dg.backup
fi
done