High density servo tracking

Details High density servo tracking High density servo tracking

1992-04-15

1994-03-01

Look, Edward K.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7712, G11B 5596

Patent

active

052913481

ABSTRACT:
A technique for operating a data storage medium, such as a magnetic tape cartridge, by writing pairs of buried servo data tracks having alternating flux densities. A servo read gap is used to locate the on-track position at the border between a pair of servo tracks by detecting a fixed relationship, such as a predetermined proportionality correction factor, between the signals read from each track. Information data read and write gaps are mounted to the servo read head to create a plurality of information data tracks, each one half or less the width of a servo data track or smaller and separated from the next track by one half the servo track width. Information data tracks are formed in these separations between tracks by positioning a second servo data read head at a distance equal to the width of an information data track pitch from the first servo read head while using the second servo read head to locate the on-track position. The flux density transitions in the servo data tracks are at a substantial azimuth angle, such as 45.degree., from the direction of motion of the tape to minimize interaction between the servo data and the information data.

REFERENCES:
patent: 4975791 (1990-12-01), Eggebeen
patent: 5055951 (1991-10-01), Behr

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