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:
Jan. 15, 1985
Filed:
Oct. 27, 1982
Takashi Koike, Tanashi, JP;
Hajime Sugiura, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A disk system comprising a plurality of disk units (1-0 to 1-7) divided into primary logical volumes (101 to 171) and secondary logical volumes (102 to 172) which are controlled by a plurality of disk controllers (4-AA to 4-BB). One of disk controllers sets an assign bit to cause one of the logical volumes to perform a stand-alone operation. This assign bit can be reset by another disk controller for another logical volume, which generates an unconditional reserve command. In this system, flip-flops (18, 19) for storing a stand-alone control signal, decoders (7-AA.about.7-BB) for an unconditional reserve command, interruption signal generating circuits (27, 28), a notification circuit (9), and the like are provided so that the issuance of an unconditional reserve command is notified to the corresponding disk controller.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile