Guard band control for magnetic disks

Details Guard band control for magnetic disks Guard band control for magnetic disks

1979-12-21

1981-11-10

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 66, G11B 2108

Patent

active

043001742

ABSTRACT:
The tunnel-erase-type guard band "writing" along the tracks of a disk in a disk file is controlled by the same microcomputer which controls transducer repositioning in the seek mode. The micro-computer meters different delays for onset and cessation of erasing in relation to a signal (write gate) accompanying the data to be recorded; and these delays are longer for tracks having smaller diameters. The leading and trailing edges of the write gate signal trigger interrupts for the microcomputer, the interrupt channel is released only after the particular delay has been metered.

REFERENCES:
patent: 4133011 (1979-01-01), Kurzweil, Jr.
patent: 4237502 (1980-12-01), Erickson, Jr. et al.

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