Method and apparatus for determining separation between read and

Details Method and apparatus for determining separation between read and Method and apparatus for determining separation between read and

1998-12-14

1999-11-23

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7703, 360 7707, G11B 2110

Patent

active

059911158

ABSTRACT:
Improvements in placement of timing patterns in self servo writing include correcting for random and systematic errors due to geometric effects. In a disk drive having a recording head with separate read and write elements, a method for determining separation between the elements and for correcting for such errors as a function of skew angle between the head and the disk. Errors resulting from misalignment and non-parallelism of the elements as well as misalignment of the head on it its actuator are also detected and corrected. Errors due to changes in rotational velocity of the disk and misplacement of timing patterns with respect to adjacent timing patterns are detected and corrected. In general, a single revolution process may be used to both write and detect random errors on each track and corrected on subsequent tracks.

REFERENCES:
patent: 5229901 (1993-07-01), Mallary
patent: 5416652 (1995-05-01), Lewis
patent: 5485322 (1996-01-01), Chainer et al.
patent: 5570247 (1996-10-01), Brown et al.
patent: 5581420 (1996-12-01), Chainer et al.
patent: 5615058 (1997-03-01), Chainer et al.
"Regenerative Clock Technique For Servo Track Writers," IBM Technical Disclosure Bulletin, vol. 33, No. 5, pp. 310-311 (Oct. 1990).
"Generating Signal Phase Accuracy Monitoring Device for Servo Writer" JP 4-23276, Patent Abstracts of Japan, vol. 16, No. 186, (P-1347), Abstract only, Abstract Date Jul. 5, 1992.
"Servo Writing Circuit for Magnetic Recorder", JP 63-872, Patent Abstracts of Japan, vol. 12, No. 199, (P-714), Abstract only, Abstract Date, Sep. 6, 1988.

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