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:
Dec. 30, 2008
Filed:
Jul. 26, 2005
James Patrick Allen, Austin, TX (US);
Thomas Stanley Mathews, Austin, TX (US);
Ravi A. Shankar, Austin, TX (US);
Satya Prakash Sharma, Austin, TX (US);
Glenn Rowan Wightwick, Shanghai, CN;
James Patrick Allen, Austin, TX (US);
Thomas Stanley Mathews, Austin, TX (US);
Ravi A. Shankar, Austin, TX (US);
Satya Prakash Sharma, Austin, TX (US);
Glenn Rowan Wightwick, Shanghai, CN;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for improving the reliability of host data stored on Fiber Channel attached storage subsystems by performing end-to-end data integrity checks. When a read or write operation is initiated, an initial checksum for data in the read/write operation is generated and associated with the data, wherein the association exists through a plurality of layers of software and attached storage subsystems. The initial checksum is passed with the data in the read/write path. When a layer of software in the read/write path receives the initial checksum and data, the layer performs an integrity check of the data, which includes generating another checksum and comparing it to the initial checksum. If the checksums do not match, the read/write operation fails and the error is logged. If the checksums match, the integrity check is repeated through each layer in the read/write path to enable detecting data corruption at the point of source.