Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1997-12-17
2000-05-09
Follansbee, John A.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
714 13, G11B 1722
Patent
active
060613092
ABSTRACT:
A method and apparatus is disclosed for maintaining states of an operator interface, such as an operator panel and convenience input/output station, of a dual library manager/dual controller system in the event of a failure to one controller during an operation. The invention allows control of the operator panel and convenience input/output station status lights and the states themselves by more than one controller without reinitializing at a default condition by detecting a failure during an operation, switching control to a second accessor controller and establishing a correct state for the operator interface via the second accessor controller. A correct state for a station is established by first establishing a fake empty status for the station and then locking the station, if necessary.
REFERENCES:
patent: 5459848 (1995-10-01), Mase
patent: 5513156 (1996-04-01), Hanaoka et al.
"Dual Use High Capacity Input/Output Station on an Automated Tape Library", IBM Technical Disclosure Bulletin, 38(05): 113-115 (May 1995).
Gallo Frank David
Judd Kristy Colleen
Lambert Anthony Andrew
McIntosh Michael Pillip
Quintana Fernando
Follansbee John A.
International Business Machines - Corporation
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