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Activating and Deactivating QDAS
5-52 BIM-EPIC Installation and System Guide
Activating and Deactivating QDAS
QDAS is activated using the TSIVON program and deactivated using the TSIVOFF program.
TSIVON activates QDAS. It is normally executed in the EPICON procedure, which was
created during installation.
TSIVON should be executed during IPL, after assignments are made to the volumes under
QDAS control, and after TSIDON and TSIDRFS are executed. QDAS remains active until it
is turned off with TSIVOFF or until VSE is IPLed. BIM-EPIC does not have to be active for
QDAS to run.
If you reinitialize any of your disk volumes, run TSIVON afterwards. QDAS then recreates
its maps.
When QDAS is active on a shared volume in one machine, it must be active for all machines
sharing that volume. If you fail to activate QDAS on all machines sharing the volume, you
will experience VTOC corruption.
// EXEC TSIVON
TSIVOFF deactivates QDAS. You can execute this program any time. You do not need to
IPL VSE after deactivation.
// EXEC TSIVOFF
TSIVON and
TSIVOFF
Activating QDAS
(TSIDON)
WARNING!
JCL Requirements
Deactivating QDAS
(TSIVOFF)
JCL Requirements
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