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EP0327207A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A method of writing a sector servo pattern for a record disk storage device

Assignee: International Business Machines Corp
•
Filing: 1989-01-12
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Granted: —
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Expires: 2009-01-12
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Abstract

Abstract In order to write a servo pattern on each of a plurality of record disks (18, 62) in a data storage device, first and second base patterns (51, 52) are first written on one (18) of the disks. The first base pattern (51) comprises a series of portions spaced along one radius of the disk, an individual one of the portions being situated at each track centre. The second base pattern (52) comprises a set of pattern portions, an individual one of the portions lying substantially continuously over each radius of a plurality of radii defining the positions of servo sectors. A sector servo pattern is then written on each of the record surfaces of the disks (18, 62) under control provided by detection of the base patterns (51, 52) on the one disk (18). The latter operation of writing the sector servo patterns on the disks need not be performed in a clean room.

Inventors

  • 👤 Shingi Mine
  • 👤 Yoichi Miwa
  • 👤 Hiroyuki Ono

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 11:44
CPC Classifications
G; G11; G11B; G11B21/00; G11B21/02; G11B21/08; G11B21/081; G11B21/083; G11B21/085; G11B21/10; G11B21/106

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 143 words
A method of writing a sector servo pattern on each of a plurality of record disks (18, 62) in a data storage device, the method comprising the successive steps of (a) writing first and second base patterns (51, 52) on one (18) of the disks, the first base pattern (51) comprising a series of portions spaced along one radius of the disk, an individual one of the portions being situated at each track centre, and the second base pattern (52) comprising a set of pattern portions, an individual one of the portions lying substantially continuously over each radius of a plurality of radii defining the positions of servo sectors; and (b) writing a servo sector pattern on each of the record surfaces of the disks (18, 62) under control provided by detection of the base patterns (51, 52) on the one disk (18).
Claim 2
Independent Claim 143 words
A method of writing a sector servo pattern on each of a plurality of record disks (18, 62) in a data storage device, the method comprising the successive steps of (a) writing first and second base patterns (51, 52) on one (18) of the disks, the first base pattern (51) comprising a series of portions spaced along one radius of the disk, an individual one of the portions being situated at each track centre, and the second base pattern (52) comprising a set of pattern portions, an individual one of the portions lying substantially continuously over each radius of a plurality of radii defining the positions of servo sectors; and (b) writing a servo sector pattern on each of the record surfaces of the disks (18, 62) under control provided by detection of the base patterns (51, 52) on the one disk (18).
Claim 3
Dependent Claim 45 words
A method as claimed in claim 1, in which step (a) is performed on the said one of the disks before the disks are installed in the data storage device and step (b) is performed after the disks are installed in the data storage device.

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