G - Physics – 06 – F
Patent
G - Physics
06
F
354/233
G06F 13/40 (2006.01) G06F 15/177 (2006.01)
Patent
CA 1176379
PO9-79-010 METHOD FOR ESTABLISHING VARIABLE PATH GROUP ASSOCIATIONS AND AFFILIATIONS BETWEEN "NON-STATIC" MP SYSTEMS AND SHARED DEVICES Abstract of the Disclosure Multiprocessing systems having changeable CPU configurations generate unique changeable identifi- cations (ID's). These are presented by I/O channels over various I/O connection paths, in association with special path defining commands and function data. Related path state indications are stored peripherally in path map tables and define path group associations for sustaining path-independent I/O operations. When a device is reserved via one path in a path group the reserve affiliation is extended automatically (in the path tables) to each path in the group, thereby rendering each path accessible in a reserved mode. The path defining commands are used for adding paths to, resigning paths from and dis- banding groups. Special sensing commands axe used for sensing path reservation and grouping states. When a command for adding or resigning a path is presented to a reserved device via one path in a group the reserve is automatically realigned to the enlarged or reduced group. When a command for dis- banding a group is presented to a reserved device the reserve is realigned to apply only to the path on which the command is presented. The foregoing special commands are required to be obeyed by the device even if it currently has a conflicting al- legiance to the same system or another system. Consequently, paths can be added to an established path group without requiring potentially premature release of any allegiance.
403594
Cormier Roger L.
Dugan Robert J.
Guyette Richard R.
Wanish Paul J.
Zeitler Carl Jr.
International Business Machines Corporation
Rosen Arnold
LandOfFree
Method for establishing variable path group associations and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for establishing variable path group associations and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for establishing variable path group associations and... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1330077