Sector identification method for hard sectored hard files

Details Sector identification method for hard sectored hard files Sector identification method for hard sectored hard files

G - Physics

11

B

352/11

G11B 20/18 (2006.01) G11B 20/12 (2006.01) G11B 27/10 (2006.01) G11B 27/30 (2006.01)

Patent

CA 1265612

SECTOR IDENTIFICATION METHOD FOR HARD SECTORED HARD FILES ABSTRACT A disk file control provides for tracks having defective sectors by forming sectors as a single, uninterrupted stream of serial data containing both identifier (ID) and data portions. Reading a single ID portion characterizes the entire track to permit writing data without a separate revolution to read the ID field. The ID information includes the offset of the first logical sector on the track and the locations of defective sectors that must be skipped. As soon as one ID is read, the location of the addressed sector is ascertained and the ID data for the sector to be written is formulated so that the entire sector including both ID and data can be written when the sector first approaches the transducer. If alternate sectors are permitted on a subsequent track under the strategy being used, a single ID on the track will define where the logical sectors making up that track will appear (either the physical sector location on the track or at an alternate location on the next track). RO983-009

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