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:
Apr. 15, 1997
Filed:
Apr. 07, 1993
Sanjoy Chatterji, Waltham, MA (US);
Sequoia Systems, Inc., Marlboro, MA (US);
Abstract
A fault tolerant disk management system supports compound disks which are mirrored, so as to tolerate single point faults in any one physical disk of the compound disk. The system further minimizes the exposure of data stored on such a compound disk arising from additional single point failures in other physical disks of the compound disk. The system may be implemented as a software method for removing a physical disk from a logical compound disk without breaking up the compound disk or any mirror of which the compound disk may be a part. The removed physical disk may then be reinserted into the compound disk and mirror after repair. Further, the system provides fault responses which may be varied in accordance with an indication of criticality of each disk to the system.