Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1990-05-21
1993-03-23
Heinz, H. J.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 36, 369189, 395425, 360 7303, G11B 1500, G11B 700
Patent
active
051970554
ABSTRACT:
A method for selecting additional data storage media for demount in an idle automated storage library, and an automated storage library and program product therefor are disclosed. The method permits the advanced demount of storage media when one or more of the occupied peripheral storage devices remains inactive for a relatively long predetermined time. Storage media may be demounted to service a pending mount request, provided the peripheral storage devices in which the media are mounted are inactive. A storage medium may also be demounted to create an unoccupied peripheral storage device, even though no mount request is pending, when all of the peripheral storage devices are occupied and one or more of such devices remains inactive for a relatively short predetermined time. In addition, regardless of the existence of a pending mount request or of the occupancy status of the peripheral storage devices, the storage medium in each of the occupied peripheral storage devices remaining inactive for the relatively long predetermined time is demounted and transferred to a storage cell in the library. Thus, during long idle periods, the library will not continue to use the resources of inactive peripheral storage devices. Storage media may also be spun down, but not removed from the disc drive.
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Hartung Joseph C.
Patton David L.
Willson Dennis L.
Winarski Daniel J.
Heinz H. J.
International Business Machines - Corporation
Rhoa Joseph A.
Schecter M. W.
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