The START command starts the CA Vtape subsystem which consists of one SVTS and multiple SVTSAS address spaces. The multiple SVTSAS address spaces consist of a utility address space (SVTSAS.SVT1UT), the Backstore Engine (SVTSAS.SVT1PT), and the Virtual Control Units (SVTSAS.SVT1Vn where n is from 1-8).
Start SVTS
There are two types of initializations that are automatically done, COLD and WARM. A COLD start is always done after an IPL. A WARM start is always done when CA Vtape is stopped and started when an IPL has not been done. In this situation CA Vtape detects that part of the subsystem is already initialized and reuses what is already in place. For a WARM start, fewer modules will be printed in the SVTS JOBLOG Resident Module List (RML) since some modules are found in memory and will not be loaded during the initialization.
After the subsystem is initialized, if the ONLINE attribute is coded in the VTDRIVE parmlib member, the Virtual Devices are varied online automatically. If the OFFLINE attribute is coded, the Virtual Devices must be varied online by issuing the following standard operating system device vary command:
Vary xxxx-yyyy,ONLINE
Where xxxx-yyyy is the range of Virtual Devices.
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