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IBM DS8870 Architecture and Implementation by Bruce Wilson, Axel Westphal, Abilio de Oliveira, Peter Kimmel, Jean Iyabi, Scott Helmick, Andre Candra, Bertrand Dufrasne

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Resiliency improvements
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 would share the same disk or logical unit number (LUN). Obviously, there is the potential issue that both hosts would ...

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