Activation of a magnetic disk apparatus

Details Activation of a magnetic disk apparatus Activation of a magnetic disk apparatus

1997-01-02

1999-06-22

Sheikh, Ayaz R.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

39575003, 711101, G06F 126

Patent

active

059151226

ABSTRACT:
A magnetic disk apparatus which is used as a subsystem of a computer system, in particular a medium-sized computer system which uses commercial power and does not have its own backup power, provided with a plurality of directors (118), a plurality of magnetic disk modules (148) commonly accessed from the plurality of directors, a plurality of director batteries (114-m) for supplying power individually to the plurality of directors, magnetic disk module batteries (114-n) for supplying power to the magnetic disk modules, and a power controller (110) for independently controlling the supply of power from the plurality of director batteries and magnetic disk module batteries in accordance with the operating state of the plurality of directors and magnetic disk modules. (FIG. 1).

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patent: 5317752 (1994-05-01), Jewett et al.
patent: 5325488 (1994-06-01), Carteau et al.
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