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:
Jul. 23, 1996
Filed:
Dec. 30, 1994
James W Bishop, Endicott, NY (US);
Mark L Ciacelli, Endicott, NY (US);
Patrick W Gallagher, Rochester, MN (US);
Stefan P Jackowski, Endicott, NY (US);
Gregory R Klouda, Endwell, NY (US);
Robert D Siegl, Endicott, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In a hierarchical, multi-level storage system, recovery from intermittent storage hardware failures is supported by establishing hardware checkpoints at storage system interfaces and by duplication of subsystem hardware within units of the storage system. When error is detected at an interface, all levels of the storage system are quiesced and backed up to a point preceding the occurrence of the error. If a hardware failure causes an error, the system is quiesced while the failed hardware is reconfigured with control logic copied from duplicate hardware. A single restart command restarts system operation.