Recording/reading high density data tracks with backward compati

Details Recording/reading high density data tracks with backward compati Recording/reading high density data tracks with backward compati

1991-11-20

1994-01-04

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

360 75, G11B 1514, G11B 2102

Patent

active

052765660

ABSTRACT:
A high density helical scan recording device having write/wide-read heads and RAW
arrow-read heads of different widths to permit an increase in the density of data tracks and to allow backward compatibility for reading and recording conventional density data tracks. The write/wide-read heads are used to record data in tracks of either the conventional density or the high density. The write/wide-read heads are also selected to read conventional density data tracks. The RAW
arrow-read heads have a reduced width that permits reading of data tracks in which greater than two-thirds of each data track has been overlapped by an adjacent data track. The RAW
arrow-read heads are used in a read-after-write (RAW) capacity and are used during a read operation of the high-density data tracks.

REFERENCES:
patent: 4101947 (1978-07-01), Lambeth
patent: 5012355 (1991-04-01), Taga et al.
patent: 5032934 (1991-07-01), Aikawa et al.
patent: 5051846 (1991-09-01), Tsushima et al.
Dictionary of Computers, Information Processing, and Telecommunications, 2nd Ed., p. 656, Jerry Rosenberg, .COPYRGT.1987 by John Wiley & Sons, N.Y.

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