Magnetic disk drive unit capable of determining data region posi

Details Magnetic disk drive unit capable of determining data region posi Magnetic disk drive unit capable of determining data region posi

1994-12-01

1996-12-03

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

360 7708, 360 7814, G11B 509

Patent

active

055814182

ABSTRACT:
A magnetic disk drive unit using a data surface servo system includes: at least one magnetic disk having a data surface, wherein a region in which servo information including a servo address for use in positioning a head is written and a succeeding data region are arranged alternately on each of a plurality of tracks sectored radially; a magnetic head used for recording or reproducing data and positioned facing the data surface; a modulating/demodulating unit for modulating a write data to thereby supply the modulated data as a record signal to a magnetic head, and for demodulating a signal reproduced by the magnetic head to thereby output the demodulated signal as read data to the magnetic head; and a read/write control unit for controlling a read/write processing of data for the magnetic disk using the magnetic head and the modulating/demodulating unit. The servo address is composed of a cylinder address indicating a cylinder associated with a corresponding one of the plurality of tracks and a sector address indicating a corresponding one of a plurality of sectors sectioned along the circumference of the magnetic disk. The read/write control unit includes a unit for detecting a servo address included in the servo information, and a unit for determining a position of a target data region according to the detected servo address, and executes a read/write processing of data for the determined data region. This configuration enables a relative increase in storage capacity without any change in recording density.

REFERENCES:
patent: 4879612 (1989-11-01), Freeze et al.
patent: 5274509 (1993-12-01), Buch

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