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:
Oct. 11, 2011
Filed:
Mar. 31, 2010
Sairam Iyer, South Grafton, MA (US);
Rahul Bhagwat, Karnataka, IN;
Ajay Potnis, Maharashtra, IN;
Amit Dharmadhikari, Pune, IN;
Miles A. Deforest, Bahama, NC (US);
Dixit Patel, Monroe, NJ (US);
Sairam Iyer, South Grafton, MA (US);
Rahul Bhagwat, Karnataka, IN;
Ajay Potnis, Maharashtra, IN;
Amit Dharmadhikari, Pune, IN;
Miles A. DeForest, Bahama, NC (US);
Dixit Patel, Monroe, NJ (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A file server architecture decouples logical storage from physical storage and provides proactive detection and containment of faults, errors, and corruptions in a file system, in order to enable in place (online) and non-intrusive recovery. The file system is built upon a thinly provisioned logical volume, and there are stored three copies of the metadata defining the logical volume in order to provide quick, deterministic, and reliable recovery from a faulted system. A first copy of the metadata is distributed among all of the slices of physical storage allocated to the logical volume. A second copy of the metadata is stored in a root slice of the logical volume. A third copy of the metadata is stored separate from the slices of physical storage allocated to the logical volume.