DASD mirroring considerations

If you use products such as PPRC or other OEM products for DASD mirroring of HCL Workload Automation for Z data sets, consider the following:

• If you need to recover on the mirrored system, allocate to DASD the EQQMLOG for the HCL Workload Automation for Z tasks, to have data sets mirrored and checked.
• The use of mirroring makes dual logging unnecessary if JT files are mirrored.
• NCP/NCX are mirrored unless the mirroring is done during the run of CP EXTEND or REPLAN, because they make NCP/NCX unusable. In this case, you must use the most recent and complete NCP backup. The message sequence EQQN121 and EQQN115 not followed by message EQQN116, shows that NCP is not yet completed and, as a consequence, the mirrored copy is unusable.
• Note that, even if you use the DASD mirroring in your environment, you must still set CURRPLAN(NEW) when starting the controller after a Disaster Recovery because with LSR buffering CP1/CP2 files cannot be completely mirrored when the disaster occurs. For the same reason, check that you use, at restart, a complete NCP copy either from mirroring or from the most recent backup.