9710 (StorageTek) Addendum for NonStop Servers

Addendum to the StorageTek™ 9710 for the Tandem Environment

The 5155/5159 Digital Linear Tape CRE and NonStop Kernel

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9.5.3.3 Using MEDIACOM to Set the System-Wide Compression

Default

MEDIACOM is the operator interface to the Distributed Systems

Management (DSM)/Tape Catalog. Using MEDIACOM

commands, the tape catalog can be managed (working with either

labeled or unlabeled tapes).

Using the MEDIACOM ALTER MEDIADEFS command can set

the system-wide default specification for compression on the 5155,

5159, 5150 or 5151 tape drive.

The compression attribute of the ALTER MEDIADEFS command

has two possible settings: COMPRESSION IDRC and

COMPRESSION OFF. The default setting is COMPRESSION

OFF. When COMPRESSION IDRC is specified, compression

mode is turned on for the 5155/5159, 5150 or 5151 tape drive.

Note. Only super-group users (user ID 255,n) can issue the

ALTER MEDIADEFS command.

To check and set the system-wide compression default

specification:

1. Enter MEDIACOM at the TACL prompt:

20> MEDIACOM

MEDIACOM - T6028D30

MC>