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. 26, 2011
Filed:
Apr. 27, 2007
Susan M. Coatney, Sunnyvale, CA (US);
Loellyn J. Cassell, Sunnyvale, CA (US);
Angel B. Aviles, Sunnyvale, CA (US);
Susan M. Coatney, Sunnyvale, CA (US);
Loellyn J. Cassell, Sunnyvale, CA (US);
Angel B. Aviles, Sunnyvale, CA (US);
NetApp, Inc., Sunnyvale, CA (US);
Abstract
A multiple node storage system cluster that allows for a takeover by a takeover node simultaneously with a failing node resetting its storage adapters is provided. A takeover monitor on the failing node initiates a 'coredump' procedure by selecting a coredump disk. After selecting the coredump disk, the failing node determines the world wide name (WWN) of that disk and sends this information in a message across the cluster interconnect to the takeover node. In response to receipt of this message, the takeover node begins takeover procedures with respect to all disks except for the coredump disk. The failing node simultaneously resets its storage adapters and writes is memory to the coredump disk. The failing node later updates a completion header on that disk. The takeover node completes the takeover without waiting for the storage adapter reset, and subsequently reads the completion header and copies coredump information into its memory.