公开(公告)号：AU548288B2

公开(公告)日：1985-12-05

申请号：AU8889482

申请日：1982-09-30

Applicant: IBM

Inventor： CORMIER ROGER LOUIS ,  DUGAN ROBERT JAMES ,  GUYETTE RICHARD ROLAND ,  HANKISON RONALD LEE ,  HAO MING C ,  LEVIN ARTHUR LOUIS ,  MCCLAIN GEORGE ALBERT ,  WANISH PAUL JOHN ,  ZEITER CARL JR

IPC: G06F3/00 ,  G06F11/34 ,  G04F10/04

公开(公告)号：DE3279484D1

公开(公告)日：1989-04-06

申请号：DE3279484

申请日：1982-06-29

Applicant: IBM

Inventor： CORMIER ROGER LOUIS ,  DUGAN ROBERT JAMES ,  GUYETTE RICHARD ROLAND ,  WANISH PAUL JOHN ,  ZEITLER CARL

IPC: G06F13/12 ,  G06F13/14 ,  G06F13/40 ,  G06F15/177 ,  H04L69/14 ,  G06F15/16

Abstract: 57 Multiprocessing systems having changeable CPU configurations generate unique changeable 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 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 disbanding groups. Special sensing commands are 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 disbanding 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 allegiance 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.

公开(公告)号：DE3280053D1

公开(公告)日：1990-01-11

申请号：DE3280053

申请日：1982-09-02

Applicant: IBM

Inventor： CORMIER ROGER LOUIS ,  DUGAN ROBERT JAMES ,  GUYETTE RICHARD ROLAND ,  HANKISON RONALD LEE ,  HAO MING C ,  LEVIN ARTHUR LOUIS ,  MCCLAIN GEORGE ALBERT ,  WANISH PAUL JOHN ,  ZEITLER JR

IPC: G06F3/00 ,  G06F11/34

公开(公告)号：AU543256B2

公开(公告)日：1985-04-04

申请号：AU8462382

申请日：1982-06-07

Applicant: IBM

Inventor： CORMIER ROGER LOUIS ,  DUGAN ROBERT JAMES ,  GUYETTE RICHARD ROLAND ,  WANISH PAUL JOHN ,  ZEITLER CARL

IPC: G06F13/12 ,  G06F13/14 ,  G06F13/40 ,  G06F15/177 ,  H04L69/14 ,  G06F13/00

Abstract: 57 Multiprocessing systems having changeable CPU configurations generate unique changeable 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 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 disbanding groups. Special sensing commands are 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 disbanding 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 allegiance 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.

公开(公告)号：AU8462382A

公开(公告)日：1983-01-27

申请号：AU8462382

申请日：1982-06-07

Applicant: IBM

Inventor： CORMIER ROGER LOUIS ,  DUGAN ROBERT JAMES ,  GUYETTE RICHARD ROLAND ,  WANISH PAUL JOHN ,  ZEITLER CARL

IPC: G06F13/12 ,  G06F13/14 ,  G06F13/40 ,  G06F15/177 ,  H04L69/14 ,  G06F13/00

Abstract: 57 Multiprocessing systems having changeable CPU configurations generate unique changeable 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 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 disbanding groups. Special sensing commands are 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 disbanding 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 allegiance 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.