Disk load library under LLA/VLF and in PDSE format

Products

• Disk Backup and Restore - MVS

Issue/Introduction

Is there any problem in allocating the Disk load library as a PDSE and defining it under LLA/VLF?

 

Resolution

There isn't any restriction in having the Disk load library allocated as a PDSE and defined under the LLA/VLF, other than trying it first in a Test Environment before doing it directly in Production to prevent any possible problem.

The library can be defined under LLA/VLF with a dynamic command without any impact on the product functionality, but changing its format to PDSE will require to hold queues and to stop all Disk batch procedures and auto restores (DMSAR process should be stopped using the S DMSAR,DMSAR=REMOVE command).

After the load library has been allocated as PDSE, it is better to test it running Disk simulation jobs (like IXMAINT or LISTD...) and verify the results. Then restart DMSAR with the command S DMSAR,DMSAR=INSTALL and any other process stopped before.