Method for establishing variable path group associations and affiliations between "non-static" MP systems and shared devices

摘要: 57 Multiprocessing systems having changeable CPU configurations generate unique identifications (ID's). These are presented by I/O channels over various I/0 connection paths, in association with special path defining commands and function data. Related state indications stored peripherally map tables define group associations for sustaining path-independent operations. When a device is reserved via one the reserve affiliation extended automatically (in tables) to each group, thereby rendering accessible mode. The used adding paths to, resigning from disbanding groups. Special sensing reservation grouping states. command or realigned enlarged reduced group. apply only on which presented. foregoing required be obeyed even if it currently has conflicting allegiance same system another system. Consequently, can added an established without requiring potentially premature release of any allegiance.