Method for utilizing a longitudinal track on a helical scan tape

Details Method for utilizing a longitudinal track on a helical scan tape Method for utilizing a longitudinal track on a helical scan tape

1995-07-20

1996-10-15

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

G11B 1518

Patent

active

055660320

ABSTRACT:
A novel method is disclosed for performing a high speed search for a selected data block or data file utilizing any one of several presently existing helical scan tape formats which utilize, in addition to the helically scanned tracks, one or more longitudinal tracks for recording indexing information indicative of the location of data blocks and file marks stored on the associated helical tracks. Data file location information is written to a header area on a series of helical tracks and to one (or more) of the longitudinal tracks when a data block or a file mark is written to a tape. A high speed search for a desired data block or data file can then be performed using this track location information.

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"DC Motors Speed Controls Servo Systems" by Robbins & Mers/Electro-Craft, 1988, pp. 5-66.

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