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:
Feb. 21, 2012
Filed:
Aug. 12, 2008
Renato J. Recio, Austin, TX (US);
Aaron Ches Brown, Austin, TX (US);
Douglas M. Freimuth, New York, NY (US);
James A. Pafumi, Leander, TX (US);
Steven Mark Thurber, Austin, TX (US);
Renato J. Recio, Austin, TX (US);
Aaron Ches Brown, Austin, TX (US);
Douglas M. Freimuth, New York, NY (US);
James A. Pafumi, Leander, TX (US);
Steven Mark Thurber, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A 'LUN Table' enables Logical Unit Number (LUN) mapping/masking within an Input/Output Virtualization IOV adapter included in a Serial Attached Small Computer System Interface ('SAS' or “Serial Attached SCSI”). A plurality of System Images (“SI”) share block storage through the SAS. The IOV adapter includes one or more Virtual Functions (VF), a Physical Function (PF), and a LUN Table within the PF. The VF allows each SI to communicate I/0 requests with a storage device through the PF. The LUN Table maps the I/0 requests to unique locations within the storage device. Each SI is isolated from all other SIs. Interference between each SI is avoided. A VIOS or a LUN mapping/masking SAN are not required. I/0 latency, processor overhead and storage cost are improved over prior LUN mapping/masking solutions.