HP LTO Ultrium 6 tape drives UNIX, Linux and OpenVMS configuration guide

The n in the filename is the instance number assigned to the drive by the operating system, where
0 is the first device, 1 is the second and so on.
Normally, the drive repositions the tape to BOT (Beginning of Tape) when the device file
is closed. Using the no rewind option is useful when creating and reading tapes that
contain multiple files.
Rewind on Close
Retensioning consists of winding to EOT (End of Tape) and then rewinding to BOT, in order
to reduce errors. If this option is selected, the tape is positioned at BOT as part of the open
process.
Retension on Open
Compression can be disabled or enabled.Compression
20 IBM (AIX) servers and workstations