About HP-UX device drivers for legacy device files
The following are the drivers supported:
The sctl driver for robotic control.
The stape driver for tape drives.
For IBM tape drives, the atdd driver. NetBackup requires a minimum atdd driver level. See the Hardware Compatibility List for IBM atdd driver levels that are supported and atdd configuration information.
http://www.netbackup.com/compatibility
NetBackup also supports the use of the IBM atdd tape driver on HP-UX 11i v3.
Also see the Operating System Compatibility List for the minimum OS patch level that is required to run on HP-UX: