Browse Prior Art Database

Configuration for Optical Disk Overwrite And Compatibility

IP.com Disclosure Number: IPCOM000120004D
Original Publication Date: 1991-Mar-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 1 page(s) / 30K

Publishing Venue

IBM

Related People

Makansi, T: AUTHOR

Abstract

A configuration for an optical disk drive is disclosed that achieves both flying-head direct overwrite on single-sided disks while maintaining compatibility with double-sided disks without overwrite.

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Configuration for Optical Disk Overwrite And Compatibility

      A configuration for an optical disk drive is disclosed
that achieves both flying-head direct overwrite on single-sided disks
while maintaining compatibility with double-sided disks without
overwrite.

      In the flying head mode, a flexure-mounted ferrite magnetic
head generates a modulating magnetic field for direct overwriting of
single sided magneto-optical disks.  The flying head and overwrite
feature increase the performance of magneto-optical disk recording
systems for future generations of storage devices.

      In the fixed-head mode (compatible with today's two-sided
disks), the ferrite head is deactivated, and the slider is retracted
to a large electromagnet.  The entire slider (composed of a ferrite
magnetic material) becomes the pole piece for the large
electromagnet.  The electromagnet is not modulated,and the system
operates in the conventional erase-then-write two-revolution
sequence.