From the specifications the tape drive is a SCSI-2 device so no special modules besides what is required for your SCSI controller. You might want to install the SCSI tape tools i.e. mt which should be on your RH CD's.
There are lots of backup tools you can download from sites like
www.linuxapps.com and
www.freshmeat.net. You can also you the tar command (tar is just one of many).
Your tape drive device should be /dev/st0 (rewinds upon task completion) or /dev/nst0 (doesn't rewind upon task completion).
As an example to use the tar command to write to your tape drive.
tar -cvf /dev/st0 * ( will create a tar backup of everything in the current directory and rewind).
To restore (create a tmp directory and cd to that directory)
tar -xvf /dev/st0
