Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Patent
1994-06-03
1999-03-02
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
360 7703, G11B 5596
Patent
active
058779108
ABSTRACT:
A dual magnetic head having a first magnetic core for reading and writing very high track density floppy disks and a second magnetic core for reading and writing conventional track density floppy disks. Neither the first nor the second magnetic cores require the trim erase elements associated with prior art magnetic cores for use with floppy disks. When writing on conventional track density floppy disks, separation between data tracks is achieved by erasing a circular region on a first rotation of the floppy disk, erasing a second region, separated from the first region by a small gap, on a second rotation of the floppy disk, and writing data during a third rotation of the floppy disk centered about the small gap. With very high density floppy disks, data is written directly between optical servo tracks on the floppy disk without use of the two erase steps.
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Godwin Jimmy D.
Otis, Jr. Alton B.
Rose Andrew M.
Strysko Mark E.
Williams Roger O.
Insite Peripherals, Inc.
Schatzel Thomas E.
Sniezek Andrew L.
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