CA Dynam for VSE User Guide

Using CA Dynam/T
The tape on drive 282 is initialized with volume serial number 1003 as a
medium length tape. It will be flagged in the Catalog for cleaning when more
than 100 temporary read/write errors have been recorded for it.
INT 282 VOLSER=(1003) LENGTH=M CLEAN=100
The tape on drive 283 is initialized with volume serial number 1004 as a
medium long tape at a recording density of 1600 BPI phase encoding.
INT 283 VOLSER=(1004) LENGTH=ML DENSITY=C0
The tape on drive 284 is initialized with volume serial number 1005 as a long
tape. The tape will be rewound when initialization is complete.
INTR 284 VOLSER=(1005) LENGTH=L
Length checking is done only during AVR scanning. CA Dynam/T does not
associate any length attribute with the tape if you do not specify one when
initializing it. CA Dynam/T will not select a tape of unspecified length for a data
set of a specified length.
Use the DYNCAT SCRPOOL command to change the length of an existing
scratch tape, or the ALTER volser command to change the length of an active
tape.
Examples:
Tape volumes 1005, 1006, and 1007 are redefined in the Catalog as long
tapes.
SCRPOOL VOLSER=(1005,1006,1007) LENGTH=L
Tape volume 1007 is redefined in the Catalog as a short tape owned by PR.
SCRPOOL VOLSER=(1007) LENGTH=S OWNER=PR
Tape volume 1008 is redefined in the Catalog as a long tape, and the owner ID
is reset to blanks.
ALTER 1008 LENGTH=L OWNER=NO
Overriding Length Attributes
You can use a tape whose length is different from the specified length of the
data set. This does not alter the tape's length attribute. The operator must
direct CA Dynam/T to the drive containing the scratch tape you will be using;
no other operator action is required to override the specified length. However,
the tape must be in scratch status.
Chapter 2: Maintaining Tape Files 2–41