DFSMShsm: Accommodate default value change for dump VTOC copies
Description
Before z/OS V2R1, the system used a default value of 2 for the VTOCCOPIES parameter of the DFSMShsm DEFINE DUMPCLASS command. Starting with z/OS V2R1, if the VTOCCOPIES parameter is not specified, the system uses a default value of 0 when DFSMShsm dumps copy pool volumes. The default value of 2 will continue to be used when DFSMShsm dumps non-copy pool volumes. If the VTOCCOPIES parameter is never specified, the LIST DUMPCLASS output displays a VTOCCOPIES value of *** to indicate that no value is specified. VTOC copies are not needed in a FRBACKUP/FRRECOV environment.
Table 1 provides more details about this migration action. Use this information to plan your changes to the system.
| Element or feature: | DFSMShsm |
|---|---|
| When change was introduced: | z/OS V2R1. |
| Applies to migration from: | z/OS V1R13. |
| Timing: | Before the first IPL of z/OS V2R2. |
| Is the migration action required? | Yes, if you want the old default value of VTOCCOPIES(2) in a FRBACKUP/FRRECOV environment. |
| Target system hardware requirements: | None. |
| Target system software requirements: | None. |
| Other system (coexistence or fallback) requirements: | None. |
| Restrictions: | None. |
| System impacts: | None. |
| Related IBM Health Checker for z/OS check: | None. |
Steps to take
If you want to keep the default value of VTOCCOPIES(2) used before z/OS V2R2 in a FRBACKUP/FRRECOV environment, specify VTOCCOPIES(2) on the DEFINE DUMPCLASS command for each dump class used to dump copy pool volumes.
Reference information
For more information about the VTOCCOPIES parameter of the DEFINE DUMPCLASS command, see z/OS DFSMShsm Storage Administration.