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88 VM/HSC 6.0 System Programmer’s Guide
1st ed., 6/30/04 - 312579601
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.
CDSDEF