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:
Mar. 22, 2005
Filed:
Aug. 28, 2001
Robert G. Dandrea, Newtown, PA (US);
Robert G. Dandrea, Newtown, PA (US);
Sedna Patent Services, LLC, Philadelphia, PA (US);
Abstract
A method and apparatus for recovering data from a failed disk drive in a disk drive array. The method and apparatus includes storing data on an array of disk drives by dividing extents of data into data segments and defining a parity group including at least one data segment from a plurality of data segments from different extents. Parity segments are generated from the data segments in the parity group and stored in the parity group. Furthermore, a second parity segment is generated from the parity segments and storied with the parity group. The method and apparatus then outputs data in realtime to users in a normal disk access mode from parity groups without the failed disk drive, and outputs recovered data in realtime to the users in a parity correction mode from the parity group containing the failed disk drive.