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:
Jul. 06, 2010
Filed:
Jun. 20, 2007
Qun Fan, Northborough, MA (US);
Qun Fan, Northborough, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Described are techniques for determining where to store data and parity information in a RAID group for a data track having a track number. A stripe number is provided. A first member identifier is determined which identifies a RAID group member at which data information of said data track is stored. A second member identifier of a second member of said RAID group is determined to store a first set of parity information for said data track. A third member identifier of a third member of said RAID group is determined to store a last set of parity information for said data track. It is determined whether the third member identifier is less than the second member identifier. If the third member identifier is less than said second member identifier, the first member identifier is updated. Also described are techniques for determining a track identifier of a data track stored at a location in a RAID group.