Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the record
Patent
1996-03-06
1997-01-28
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the record
360 7303, 360 7301, G11B 2719
Patent
active
055983030
ABSTRACT:
A synchronization technique is described which finds use in a disk array subsystem comprising a plurality of disk storage devices connected to a controller. In response to signals from each of the devices specifying their angular position at a particular time, the controller calculates the relative angular positions of the devices and issues a signal to each of the devices specifying the amount and direction of change in rotational velocity required to achieve synchronization. In a two device subsystem, the signal to one device will specify a speed decrease and the signal to the second device will specify a speed increase.
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Jones J. Wyn
Legg Stephen P.
Newman Eric L.
Bussan Matthew J.
Cullen Larry T.
International Business Machines - Corporation
Sniezek Andrew L.
Truelson Roy W.
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