CA Dynam for VSE User Guide

IBM 3494 Tape Library Interface
For information about how to set up the IBM 3494 using CA Dynam/T VM, see
the CA Dynam/T VM documentation.
IBM 3494 Multiple Library Support
IBM supports multiple tape libraries each with its own unique name which can
be up to 8 characters long. The CA Dynam/T DTLIB option record can be used
to associate a 1 byte library id with the 8 character library name when multiple
libraries are used.
The 2-byte CA Dynam/T OWNERID can be used to specify both the library id
and the scratch poolid by setting MODON=23 ON in the CA Dynam/T system
option record. The first byte of the CA Dynam/T OWNERID is used to specify
the library id. The only valid characters are 0 (zero) through 9 and letters A
through Z. The second byte of the CA Dynam/T OWNERID is used to specify
the scratch poolid. The only valid characters are 0 (zero) through 9 and letters
A through F, where A = 10, B = 11, C = 12, D = 13, E = 14, and F = 15. A CA
Dynam/T OWNERID of FF translates to a library id of F and a scratch poolid of
SCRATCH15.
IF MODON=23 is OFF, all LBSERV calls set the library name to BLANKS (X40)
so that the default library name is always accessed even if two or more
libraries are defined in the IBM robot system.
Forcing a Re-Scan of the IBM 3494 Tape Drives
Before the first CA Dynam/T tape mount is requested, either the IBM LCDD
partition or the IBM VGS server machine must be running. If neither is
running, the CA Dynam/T table that holds all the tape drive addresses of the
IBM tape robot system will be 0 (zero), and you cannot access the IBM tape
robot system using CA Dynam/T.
If you cannot access the IBM tape robot system and either the IBM LCDD
partition or the IBM VGS server machine is running, try reloading phase
CATNLOG0. This forces CA Dynam/T to scan the IBM robot system and update
an internal table with all the tape drive addresses found in the IBM tape robot
system.
Use the following JCL to reload CATNLOG0:
// JOB RELOAD
// UPSI 01
// EXEC CASAUTIL
RELOAD CATNLOG0
/*
Chapter 3: Supporting Tape File Management 3–53