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Automatic Access Calibration of a Direct Access Storage Device

IP.com Disclosure Number: IPCOM000069668D
Original Publication Date: 1978-Jun-01
Included in the Prior Art Database: 2005-Feb-21

Publishing Venue

IBM

Related People

Authors:
Boscove, JA Guest, JE Merle, RP Pompey, MP [+details]

Abstract

In order to maintain the specified access performance of a disk storage unit (DSU), it is necessary to calibrate the velocity control loop during a power-up sequence. If this calibration is not initiated, the related disk file control (DSF) will still seek but with reduced performance. Apparatus is described that relieves the user of the need to calibrate a DSU to insure specified access performance. This arrangement is useful, as an example, with the IBM Series/l computer systems.