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:
Aug. 10, 2010
Filed:
Nov. 15, 2006
Steven Watanabe, San Jose, CA (US);
Susan Coatney, Cupertino, CA (US);
Steven Watanabe, San Jose, CA (US);
Susan Coatney, Cupertino, CA (US);
NetApp, Inc., Sunnyvale CA, unknown;
Abstract
In an embodiment of the invention, a method and apparatus permits the reliable disk ownership changes. The method and apparatus generate a replay request based on ownership data stored in a persistent memory device, in response to a failure occurrence when ownership is being changed for disks in an aggregate. The method and apparatus will compare an update count in the replay request with an update count in a disk in the aggregate. Based on the comparison of the update count, the ownership on the disk is changed so that each disk in the aggregate will be owned by a same node. The failure occurrence can be, for example, a power failure, a panic occurrence, or a takeover procedure.