Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1992-02-04
1994-03-08
Argenbright, Tony M.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
360 48, G11B 509
Patent
active
052935655
ABSTRACT:
Data-storing disks, preferably each disk having a single spiral track, have addressable tracks that are independent of the length of disk or spiral track revolutions. Each revolution may contain a non-integral number of addressable tracks and sectors. An optical disk is used to describe the invention. The circumferential location of the tracks and sectors precess circumferentially. A plurality of radially disposed revolution bands each contain a fixed number of the revolutions an increasing number of the addressable tracks in the radially outer more ones of the bands. It is preferred that the number of bands be 2.sup.n, where n is an integer. Each band is divided into a plurality of revolution groups, each group having a fixed number of revolutions. Each group in a band has a like number of the addressable tracks. A so-called anchor sector has one end anchored to a reference circumferential position on the disk. Each revolution group begins with an anchor sector, all other sectors in the group are positioned circumferentially with respect to the anchor sector. Addressable track seeking, alternate embodiments and fabrication of a disk are described.
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IBM Technical Disclosure Bulletin, vol. 29, No. 4, Sep. 1986 titled "Skewed Format Method for Personal Computer Hard Disks to Reduce Rotational Latency Delays" pp. 1867-1868.
Jaquette Glen A.
Kulakowski John E.
McDowell Judson A.
Means Rodney J.
Argenbright Tony M.
International Business Machines - Corporation
Somermeyer H. F.
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