Method and apparatus of measuring seek time using optical disk a

Details Method and apparatus of measuring seek time using optical disk a Method and apparatus of measuring seek time using optical disk a

1993-12-15

1995-03-14

Neyzari, Ali

Dynamic information storage or retrieval

Information location or remote operator actuated control

Selective addressing of storage medium

369 4428, G11B 1722

Patent

active

053982223

ABSTRACT:
A magneto-optical disk apparatus and a method of measuring seek time using it. The method comprises the steps of allowing a host system to generate a seek instruction, calculating instruction time, transferring the seek instruction from the host system to the optical disk apparatus, driving a timer of the host system to start a counting operation of the timer and setting a count of the timer at that time as a seek start time, generating an interrupt signal to the timer in the host system to stop the counting operation of the timer if an optical head reaches accurately a desired target track on an optical disk for a predetermined time period and setting a count of the timer at that time as a seek stop time, obtaining the seek time by subtracting the seek start time, latency time per 1/2 revolution of the optical disk and the instruction time from the seek stop time, and sending an error message code to the host system to notify the host system of a failure in an seek operation if the optical head does not reach accurately the target track for the predetermined time period.

REFERENCES:
patent: 5063545 (1991-11-01), Nishida
patent: 5189650 (1993-02-01), Watanabe et al.

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