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. 16, 2010
Filed:
Aug. 07, 2007
Garth A. Gibson, Pittsburgh, PA (US);
Marc Jonathan Unangst, Pittsburgh, PA (US);
David F. Nagle, New York, NY (US);
Garth A. Gibson, Pittsburgh, PA (US);
Marc Jonathan Unangst, Pittsburgh, PA (US);
David F. Nagle, New York, NY (US);
Panasas, Inc., Pittsburgh, PA (US);
Abstract
A system includes storage devices where a RAID-X format is implemented at a file level. In response to a failure, a map is retrieved. The map includes a list of devices where components of at least one file reside. The map is used to determine whether a number of lost or damaged components associated with the file exceed a maximum limit beyond which reconstruction of a file stored using the file level implementation of the RAID-X format is not possible. If the maximum limit has not been exceeded, the file is reconstructed. The system continues to service data storage and access requests, with reconstruction being performed as a background operation, after a number of device failures has occurred which would have exceeded the maximum limit of device failures for reconstruction had the file been stored using a volume level implementation of the RAID-X format.