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:
Aug. 18, 2009
Filed:
Nov. 14, 2005
Tetsuya Uemura, Saitama, JP;
Tetsuya Uemura, Saitama, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
Embodiments of the invention provide a disk device data integrity verification support method that allows data integrity verification of a disk array apparatus without consuming an interface band of disk devices. In one embodiment, arithmetic operations for data integrity verification are divided into those of a first phase that can be performed at least in the disk devices, and those of a second phase that can be performed in the disk array apparatus only. The arithmetic operations of the first phase are conducted using the following procedure: data is read out from a storage medium, saved arithmetic operation interim results are read out, the arithmetic operations using the two sets of data are conducted, and arithmetic operation results are saved as new interim results. During the arithmetic operations of the second phase, arithmetic operation results of the first phase are read out from each disk device and further arithmetic operations are conducted between those arithmetic operation results.