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:
Mar. 18, 2014
Filed:
Jul. 30, 2010
Ralph a Becker-szendy, San Jose, CA (US);
Veera Deenadhayalan, San Jose, CA (US);
D. Scott Guthridge, San Jose, CA (US);
James Christopher Wyllie, San Jose, CA (US);
Ralph A Becker-Szendy, San Jose, CA (US);
Veera Deenadhayalan, San Jose, CA (US);
D. Scott Guthridge, San Jose, CA (US);
James Christopher Wyllie, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
This disclosure relates to parity declustered storage device arrays having partition groups. In an exemplary embodiment, the storage system includes a storage device array, such as disk array. Each storage device is divided into partitions. Each partition includes stripe units, such as hundreds or thousands of stripe units in exemplary embodiments. The storage system also includes a physical array controller coupled to the storage device array. In an exemplary embodiment, the array controller includes a partition group lookup table and stores and retrieves data and parity in the storage devices based on the partition group lookup table. In this exemplary embodiment, the array controller also includes a stripe lookup table and/or a log. In an exemplary embodiment, the partition group lookup table and the stripe lookup table take up less memory (e.g., by an order of magnitude) than a single-level stripe map conveying the same information.