Wangtek

Clement R Copolillo

In a magnetic storage system, an error recovery is performed by reading the magnetic medium again with the filter programmed to a higher boost. If the retry still fails, the magnetic medium is read again with the filter programmed to a lower boost. The filter adjustment can be performed in combination with position adjustment of the read head, i.e. displacing the read/write head from the centerline of the track during error recovery to reduce read errors.

Magnetic storage devices with dynamic boost adjustment to reduce read

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.

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Oxnard, CA, United States of America

Clement R Copolillo