Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1994-10-20
1995-08-01
Sugarman, Scott J.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 58, 369 32, 369 48, 360 51, 360 7708, G11B 390, G11B 509
Patent
active
054385598
ABSTRACT:
A data recording disk file is provided with a fixed block architecture sector format that eliminates the ID region. The servo region contains sector identification information in the form of a start-of-track indicating mark recorded in a selected sector of each track and a start-of-sector indicating mark recorded in each sector. A full track number identifier is encoded in the position field within the servo region of each sector. A look-up table is built at format time to map bad sectors out of the disk file. The table contains entries for each cluster of contiguous bad sectors, and is searched at runtime to provide conversion of logical sector location identifiers to physical sector location identifiers.
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Best John S.
Hetzler Steven R.
Berthold Thomas R.
Hindi Nabil
International Business Machines
Kappos David J.
Sugarman Scott J.
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