This appendix discusses resiliency improvements supported on the IBM DS8870 with DS8000 Licensed Machine Code (LMC) 7.7.10.xx.xx or later.
The resiliency improvements include the following features:
•Small Computer System Interface (SCSI) reserves detection and removal
•Querying count key data (CKD) path groups
•IBM z/OS Soft Fence
B.1 SCSI reserves detection and removal
Assume that two hosts share a disk or logical unit number (LUN). Obviously, the potential issue is that both hosts write data to the LUN ...