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
9-53
9.5.3.4 Using a DEFINE to Override the System Compression
Default
The system-wide compression default specification set by the
MEDIACOM ALTER MEDIADEFS command applies to
labeled and unlabeled tapes. After the default specification is
set, the drive always writes using the default setting. The
default specification can be overridden for a specific job by
using a CLASS TAPECATALOG DEFINE.
A CLASS TAPECATALOG DEFINE is a named set of
attributes and values that specify information about a tape file.
If labeled tape is used, a CLASS TAPECATALOG DEFINE
must be created for each tape file to be accessed before the tape
can be used.
9.5.3.5 Using a CLASS TAPECATALOG DEFINE
There are two types of tape DEFINEs:
• CLASS TAPE DEFINEs
• CLASS TAPECATALOG DEFINEs
If the DSM/Tape Catalog software system is being used, a
CLASS TAPECATALOG DEFINE must be used. A CLASS
TAPECATALOG DEFINE is similar to a CLASS TAPE
DEFINE, but the CLASS TAPECATALOG DEFINE has two
additional attributes:
Attribute Options
CATALOG ON or OFF
COMPRESSION IDRC or OFF