5190/5194 Modular Tape Subsystem Manual

Operating the Cartridge Tape Drive and ACL
5190/5194 Modular Tape Subsystem Manual—426878-002
4-47
Using COUP to Set Compression Mode (NonStop
Himalaya K-Series Servers)
Using COUP to Set Compression Mode (NonStop Himalaya
K-Series Servers)
If you use COUP to add a 5190 tape drive to your system configuration, you can
enable or disable compression for the 5190 tape drive by specifying the
COMPRESSION or NOCOMPRESSION device attribute before adding the device to
your system.
To change the compression mode of a 5190 tape drive using COUP, you must stop the
drive, use the COUP ALTER command to change the drive attributes, and then restart
the drive using the COUP START command. You must be a member of the super
group (user ID 255,n) to use the COUP START, STOP, and ALTER commands.
The systemwide default compression setting set by MEDIACOM takes priority over the
COUP compression attribute.