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. 29, 2001
Filed:
Aug. 06, 1998
Fujitsu Limited, Kawasaki, JP;
Abstract
The present invention relates to a magnetic disk control unit which can accomplish active interchange of firmwares. Thus, in this invention, a firmware constituting the magnetic disk control unit includes an internal table area for retaining various data necessary for control, a save area for temporarily saving, of the data in the internal table area, data necessary before and after interchange of the firmware while the firmware undergoes active interchange, a first interruption control section serving, as interruption handling functions, a normal function to refer to the internal table area in accordance with an interruption for advancing to processing to the interruption and a busy response function to perform a busy response to the host unit during the firmware active-interchange, and a second interruption control section serving, as an interruption handling function, only a busy response function to accomplish a busy response to the host unit during the firmware active-interchange. This invention is successfully applicable to systems required to continuously run for 24 hours.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile