StorageTek 6 manual Cdsdef, Control Statement Name, Parameters, DSNx, VOLx, UNITx, Disable

CDSDEF

Control Statement Name

CDSDEF

initiates the control statement.

Parameters

DSNx

dataset.name is the name of an HSC control data set. At least one DSN parameter must be specified, as many as three can be specified. If two data sets are specified, then the volume inventory information on both copies is kept current, and these two data sets are referred to as the primary and the secondary CDS.

If all three are specified, then two copies are kept current and the third data set is a standby CDS which is enabled as the default condition. This standby CDS can be disabled with the DISABLE parameter. In the case where a standby copy of the CDS is being used, you do not need to specify which two of the three CDSs are the primary and secondary copies. The HSC determines, based on last use, which two are the correct copies to use during the initialization of the Control Data Set Services.

VOLx

optionally, volser is the volume serial number of the DASD volume where the specified CDS resides. The VOL parameter must be specified in VM.

UNITx

optionally, unitname is used to specify the unit parameter in the SVC99 dynamic allocation parameter list. The UNIT parameter must be specified in VM.

DISABLE

optionally, disables the standby CDS. If this parameter is not specified, the default is to enable the standby CDS at HSC initialization.

If DISABLE is specified, initialization verifies the standby CDS by allocating, opening, and reading the data set. The standby CDS is then closed and unallocated. This process allows manual control over the use of the standby CDS during a control data set switch situation.

If the standby CDS is enabled, the HSC automatically uses it for switching. If it is disabled, it is not used. There is no enable parameter for CDSDEF, as the enable condition is the default.

88VM/HSC 6.0 System Programmer’s Guide

1st ed., 6/30/04 - 312579601