Disk drive with track zero location system

Details Disk drive with track zero location system Disk drive with track zero location system

1983-12-21

1987-08-04

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

318685, 318696, G11B 2108, G11B 555

Patent

active

046850074

ABSTRACT:
A low cost disk drive system includes track zero information located in a single sector on the disk surface. The information is comprised of a first type of signal located in tracks to one side of an arbitrary reference track and a second type of signal located in the tracks to the other side of the arbitrary reference track. The magnetic head of the disk drive system is moved radially with respect to the disk and the transition between the signals detected in order to locate the head at the reference track.

REFERENCES:
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IBM TDB, vol. 19, No. 3, "Track Location Correction Mechanism for Magnetic Disks" Hanson et al., Aug. 1976, pp. 1039-1041.
IBM TDB, vol. 19, No. 4, "Head-to-Track Synchronizing Mechanism for Magnetic Disks" Porter et al., Sep. 1976, pp. 1393-1395.
IBM TDB, vol. 19, No. 6, "Self-Calibrating Disk Storage Apparatus" Griffiths et al., Nov. 1976, pp. 1991-1992.

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