How to backup huge data into multiple tape

Hi experts,
I have a huge amount of data size. I need to be able to backup the data into whatever number of dds4 tapes until finish. The requirement is, after first tape is full, it will prompt for next tape, until finish. This is part of my current script (currently it just terminated after the tape is full, without message). I'm using single tape drive:

cd /export/oradata/${ORACLE_SID}
BKUPDIRS="datafile index ctrl logfile $ORACLE_HOME/dbs archive"
export BKUPDIRS
4mm_backup.ksh

This is 4mm_backup.ksh script:

bkup2tape ()
{
        logfile=$HOME/log/4mmbkup.log
        rm -f $logfile

        echo "${tabs}PLEASE INSERT 4mm TAPE TO HOST"
        echo "${tabs}AFTERWARDS HIT ENTER TO PROCEED\c"
        read hold

        echo "${tabs}PLEASE WAIT FOR BACKUP TO COMPLETE"
        tar cvhf $TAPE_DEVICE ${BKUPDIRS} >$logfile 2>&1
        if [ $? -ne 0 ]
        then
                echo "${tabs}BACKUP TO TAPE FAILED"
                cd $HOME/log
                echo "${tabs}CONTENTS OF BACKUP LOG FILE"
                more $logfile
        else
                echo "${tabs}BACKUP TO TAPE SUCCESSFUL"
                echo "${tabs}EJECTING TAPE.."
                mt -f /dev/rmt/0 offline
                cp $logfile $logfile.`date '+%d-%m-%y_%H:%M:%S'`
        fi
}

# Main
if [ -n "$BKUPDIRS" ]
then
        bkup2tape $BKUPDIRS
fi

Hope you gurus can help.
TQ
KerberossAsked:
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yuzhConnect With a Mentor Commented:
tar can only do single-volume backup, you need to use "cpio" or "ufsdump to perform
multiple-volume tape backup.

eg:

you save a list of file name in filelist

cat filelist | cpio -oacv -O $TAPE_DEVICE

man cpio
man ufsdump
to learn more details.

also
please read this doc:
http://docs.sun.com/app/docs/doc/802-7675/6ib9g0f6h?a=view
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