G - Physics – 11 – B
Patent
G - Physics
11
B
352/21.32
G11B 21/10 (2006.01) G11B 5/596 (2006.01) G11B 21/08 (2006.01)
Patent
CA 1317373
ABSTRACT The present disclosure teaches a method of writing servo patterns for increased productivity. The process for writing servo patterns is divided into a pre-operation carried out before disks are installed into a disk device (fixed to the spindle shaft) and a post-operation that is carried out after the installation. In the pre-operation, patterns written on the recording surface of the disk are two base patterns, namely, (a) a first base pattern arranged on each track center along one radial direction of the disk and (b) a second base pattern arranged along the radial direction at each position corresponding to the position of the sector in a substantially continuous fashion. Then, the disks are assembled or installed into the disk device together with blank disks. In the post-operation, the servo patterns are written based on the first and second base patterns. Here, the expression "substantially continuous fashion" also includes the case where the number of discontinuous portions is smaller than that of the first base pattern even if some discontinuous portions are present in the base pattern, besides the case where the base pattern is completely continuous along the radial direction. JA9-87-020
592100
Mine Shingi
Miwa Yoichi
Ono Hiroyuki
Internatonal Business Machines Corporation
Saunders Raymond H.
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