The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 1991
Filed:
Feb. 25, 1988
Charles I Peddle, Scotts Valley, CA (US);
Robert G Taylor, Jr, Santa Cruz, CA (US);
John R Masters, Aptos, CA (US);
Glenn M Stark, Santa Cruz, CA (US);
Kenneth M Stein, San Jose, CA (US);
James M Donohue, Los Alamitos, CA (US);
Michael T Dugan, Thousand Oaks, CA (US);
William G Swinton, Santa Cruz, CA (US);
Bruce A Fairman, Woodside, CA (US);
Warren L Dalziel, Monte Sereno, CA (US);
Tandon Corporation, Moorpark, CA (US);
Abstract
A disk drive system includes a disk controller system having separate head positioning and data transfer subsystems and supporting up to four disk drives, two of which may be removable, portable drive units and two of which may connect through a standard ST506 interface. The removable disk drives incorporate a read and write protected data cylinder for storing information such as the maintenance history of the drive, and a read only cylinder for storing a unique serial number as well as other write protected data. The system also features a high capacity, high speed sector buffer which allows continuous transfers of data to or from noninterleaved sectors and supports concurrent disk and system accesses.