Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1995-08-23
1999-08-31
Katbab, A.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 30, G66F 1300
Patent
active
RE0362867
ABSTRACT:
A method for selecting data storage media for demount in an automated storage library, and an automated storage library and program product therefor are disclosed. Preemptive demount of storage media is permitted when all peripheral storage devices in the library are occupied and one or more of such devices remains inactive for a predetermined time. Storage media may be demounted to service existing mount requests, provided the peripheral storage devices in which the media are mounted are inactive. There is also a need, however, to ensure the availability of an empty device to service future mount requests, particularly in libraries having only a single gripper mechanism. Thus, even when no mount requests are pending, the status of the peripheral storage devices is continually monitored. If the peripheral storage devices are all occupied, and one or more of such devices remains inactive for the predetermined time, the least recently used storage medium is demounted and transferred to a storage cell in the library.
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Hartung Joseph Charles
Monahan Christopher John
Thrall Jesse Lee
Willson Dennis Lee
Winarski Daniel James
International Business Machines
Katbab A.
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