Data recording/reproducing system capable of processing servo pr

Details Data recording/reproducing system capable of processing servo pr Data recording/reproducing system capable of processing servo pr

1997-06-17

1998-04-07

Swann, Tod R.

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

711101, 711111, G06F 1300

Patent

active

057377626

ABSTRACT:
At a predetermined time before activation of a motor of a hard disk drive HDD, a central processing unit CPU transfers a part of a speed control routine or a part of a position control routine from a read only memory ROM via an external bus, and stores the transferred part in a command random access memory RAM. When a servo process is executed, the CPU accesses to the ROM and the command RAM and executes a head positioning control consisting of a speed control and a position control. Thereby, a routine stored in the command RAM can be accessed at high speed. As a result, a servo process time period can be reduced.

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Specification of MB90747, Fujitsu Ltd. pp. 197-198, M.H. Aug. 30, 1994.

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