Method for a host central processor and its associated controller to capture the selected one of a number of memory units via path control commands

摘要

A pair of data processing systems, each of the data processing system having a host central processor and an associated controller including memory, both of the data processing systems to be cooperatively associated with a number of disk drive memory units, each of the disk drive memory unit coupled to both said controllers. Either one of the host central processors can appropriate any one of the disk drive memory units as a selected disk drive memory unit by propagating path-control-data to the memory in both of the controllers arid in the selected disk drive memory unit.