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Extending Architectural Capabilities of Disk Drive Addressability

IP.com Disclosure Number: IPCOM000058568D
Original Publication Date: 1988-Nov-01
Included in the Prior Art Database: 2005-Feb-15

Publishing Venue

IBM

Related People

Authors:
Bealkowski, R Canova, F Dayan, RA Dixon, JD Keener, DS Sotomayer, GG [+details]

Abstract

A technique is described whereby the architectural capabilities of disk drive addressing is extended so as to enable disk storage systems, with up to a gigabyte of storage, to be installed on personal systems equipped with the compatibility basic input output system (CBIOS). Described is a logical mapping algorithm which converts physical disk parameters into logical relative block addresses (RBAs). In prior art, addressing of large disk storage devices was limited due to the maximum range of cylinder, head and sector parameters. Also, platter and head designs limited the number of heads in that the addressability was also limited.