Sysplex-related volume 1
This is a user-maintained volume and does not contain data sets overlaid by a system replacement.
The recommended types of data sets for this volume are:
- Sysplex primary
- CFRM alternate
- ARM primary
- WLM primary
- LOGR primary
- SFM primary
- Sysplex root
Considerations when setting up sysplex-related volume 1 are:
- Couple data sets should not be placed on volumes that have high I/O activity, are subject to RESERVEs, have page data sets, contain SYS1.DUMPnn data sets, or are eligible for allocation of data sets dynamically allocated for SVC dumps.
- The CFRM primary and SYSPLEX primary should be on different volumes attached to different control units. All other primary couple data sets can reside on the same volume, and all other alternate couple data sets can reside on a different volume.
You can find more guidelines for placement of couple data sets in z/OS MVS Setting Up a Sysplex.