Tape Backup / Restoration commands

Display the content of the tape

tar tvf /dev/st0 

To backup directory to tape with compression

tar cvzf /dev/st0 /u01/finsys

To restore entire data from the tape

tar -xvf /dev/st0 -C /u01/TEST

To restore specific file from the tape

tar -xvf /dev/st0 u01/PROD/finsys.tar -C /u01/TEST

Reference
http://www.cyberciti.biz/faq/linux-tape-backup-with-mt-and-tar-command-howto/