gtpd1m0jDatabase Reference

Premount of General Data Sets

An operator message exists to force premount processing to occur on the next IPL of the system. During this IPL the user may want a number of data sets to be mounted. This premount function allows a user to assemble, in the control records provided, the data set names, volume sequence numbers, and volume serial numbers of those data sets. This function is provided to free the computer room operator from manually mounting all the data sets that may be required by the system.

The premount records are contained in program records. The first premount record is CVZE, and the second (if needed) is CVZF. The macro GDSPC is used to build the premount. A GDSPC macro is coded for each data set to be mounted. Each premount record can hold a variable number of data sets depending on the number of volumes per data set.

Once the macros are coded, the program is assembled and loaded to the system. When the premounts are ready for use, the operator issues the ZDSMG INIT command. This causes the GDS restart to process the premount records on the next IPL. Any previously mounted data sets are forgotten.