tar -cvf /dev/st0 backupfiles…and the tape is not already set to the end of the previous archive you will over-write any data from the position on the tape. Use the “eom” command to move the tape to the end of the alread-recorded files like so:
mt -f /dev/[path-to-tape] eome.g.:
mt -f /dev/st0 eomNow you can use tar to add a file to the tape without over-writing the existing data.