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:
Nov. 08, 1988
Filed:
May. 19, 1987
Ronald R Moon, Santa Clara, CA (US);
Michael G Machado, San Jose, CA (US);
Thomas G Cooper, Palo Alto, CA (US);
Patrick M Weiher, Los Altos, CA (US);
Curtis H Bruner, Los Gatos, CA (US);
Mark E Strysko, Sunnyvale, CA (US);
Gregg J Uhlendorf, San Jose, CA (US);
Steven G Campbell, San Jose, CA (US);
Tuong T Quan, San Jose, CA (US);
Hoa V Luong, Milpitas, CA (US);
Quantum Corporation, Milpitas, CA (US);
Abstract
A disk data storage subsystem includes a head and disk assembly. A plurality of sectors in data tracks include a servo portion containing a prerecorded pattern of a plurality of repeating, time staggered, non-phase-coherent bursts, each burst having a predetermined integral fraction radial offset relative to the other bursts. The head is positionable relative to the tracks by a voice coil in response to information derived from a servo portion, a programmed microcontroller supervisor receives operational data storage and retrieval commands from a host system with which the subsystem is operationally associated and controls the position of the head during track seeking and following operations in response to servo information read by the head from each servo portion and further in response to the commands, an interface, with an SCSI interface controller, under the control of the microcontroller supervisor receives the commands and data blocks from the host system and for sending commands, status words and data blocks to the host system, a data sequencer and memory controller under the control of the microcontroller manages flow of data blocks to and from the disk via the head.