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

Select the tape drive you wish to change. The example above shows an LTO FC tape drive
as available for selection.
4. The following details are displayed:
Check the following values and change them if necessary:
BLOCK Size (0=variable length)= 0
Use EXTENDED file marks = no
RESERVE/RELEASE support = yes
Set timeout for the READ or WRITE command = 1200
Click on the OK button to apply the changes.
If you are using a non-graphics terminal
1. At the command line type:
nl
% smit -C tape
2. The following is displayed:
Select change/show characteristics of a tape drive
3. A pop-up window is displayed:
18 IBM (AIX) servers and workstations