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Efficient Way to Detect Variable Sectors/Track Diskette Format

IP.com Disclosure Number: IPCOM000043541D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05

Publishing Venue

IBM

Related People

Authors:
Hung, TC [+details]

Abstract

Disclosed is a new approach which assures efficiency and error recovery support to determine any number of sectors per track by using a double detection algorithm for speed and reliability. In most cases, the first read to the primary media control record (MCR), which is required to determine the type of a diskette, will indicate the number of sectors per track with the minimum amount of time. When the primary MCR is bad, there is a way to tell in which physical sector the secondary MCR resides. This double detection algorithm is very efficient and applicable in most environments where different sector, track or cylinder configurations are to be supported.