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:
Sep. 04, 2012
Filed:
Aug. 11, 2010
Howard Young, Thousand Oaks, CA (US);
Mukul Kotwani, Woodland Hills, CA (US);
Srinivasa Nagaraja Rao, Oak Park, CA (US);
Kartik D. Agarwal, Newbury Park, CA (US);
Gordon L. Larimer, Agoura Hills, CA (US);
Howard Young, Thousand Oaks, CA (US);
Mukul Kotwani, Woodland Hills, CA (US);
Srinivasa Nagaraja Rao, Oak Park, CA (US);
Kartik D. Agarwal, Newbury Park, CA (US);
Gordon L. Larimer, Agoura Hills, CA (US);
LSI Corporation, Milpitas, CA (US);
Abstract
Methods and apparatus for expanded capacity virtual volumes in a virtualized storage system. A storage controller of the storage system parses a SCSI command block as it is received to generate a tag value indicating a segment of a virtual volume to which the command block is directed. The tag value is used to select one of a plurality of mapping segment objects stored in a memory of the controller. Each mapping segment objects maps logical block addresses of a corresponding segment of a corresponding virtual volume to physical storage addresses on the physical storage devices that comprise the virtual volume. An I/O processing circuit of the controller then processes the SCSI command block in accordance with the mapping information in the selected mapping segment object. In one exemplary embodiment, each segment of a virtual volume comprises 2 terabytes of storage capacity of the virtual volume.