Magnetic disk storage device control method, disk array system c

Details Magnetic disk storage device control method, disk array system c Magnetic disk storage device control method, disk array system c

1997-07-18

2000-05-02

Edun, Muhammad

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 7301, 360 69, G11B 1548

Patent

active

060579749

ABSTRACT:
A method and system which prevents starting-up problems in plural magnetic disk storage devices included in a disk array system during restart following halt of the magnetic disk storage devices after long term operation. The disk array system includes the plural magnetic disk storage devices, a microprocessor unit (MPU) which controls the magnetic disk storage devices, a control memory, a parity calculator, and cache memory. The control memory contains a operation time control table in which a tolerable continuous operation time Ti and a halt time Ts are stored. Each of the magnetic disk storage devices is intentionally stopped individually for the halt time Ts at time interval of the tolerable continuous operation time Ti. A request for reading data from one magnetic disk storage device under halt is responded to by using a data recovery function, while a request for writing data to a magnetic disk storage device under halt is responded to by writing data to an alternate spare magnetic disk storage device or memory.

REFERENCES:
patent: 5691948 (1997-11-01), Sakabe

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