System for detecting a reference track of a disc storage unit

Details System for detecting a reference track of a disc storage unit System for detecting a reference track of a disc storage unit

1988-11-17

1991-06-25

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7814, G11B 5596, G11B 555

Patent

active

050272349

ABSTRACT:
A read/write head which is usually used for reading out and writing information from and into the surface of the disc and the servo information recorded on the disc as a position sensor. Servo information to be recorded on a surface of a disc to detect the deviation of the head from a normal position of each track is formed by a plurality of servo information portions and the servo information regarding to a reference track is made different from the servo information of other tracks. A plurality of numerical values indicative of the servo information portions are detected from the signal read out by the head. In accordance with the detected values, the reference track is designated.

REFERENCES:
patent: 4683504 (1987-07-01), Cantello et al.
patent: 4685007 (1987-08-01), Nazarian et al.
patent: 4745497 (1988-05-01), Ozawa
patent: 4875114 (1989-10-01), Moteki
patent: 4884152 (1989-11-01), Ide

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