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:
Apr. 06, 2010
Filed:
Jun. 30, 2007
Jean-pierre Bono, Westboro, MA (US);
John M. Hayden, Holliston, MA (US);
Sairam Veeraswamy, Westborough, MA (US);
Uresh K. Vahalia, Newton, MA (US);
Morgan A. Clark, So. Orange, NJ (US);
Sachin Mullick, Natick, MA (US);
Jean-Pierre Bono, Westboro, MA (US);
John M. Hayden, Holliston, MA (US);
Sairam Veeraswamy, Westborough, MA (US);
Uresh K. Vahalia, Newton, MA (US);
Morgan A. Clark, So. Orange, NJ (US);
Sachin Mullick, Natick, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A self healing file system is designed for proactive detection and containment of faults, errors, and corruptions, in order to enable in place (online) and non-intrusive recovery. For proactive fault detection, the file system maintains certain per-block metadata of each file system block. The per-block metadata includes a redundancy check, and for file system data blocks, an inode identifier, and an offset of the file system data block in the file including the file system data block. The redundancy check is used to detect and mark bad file system blocks. The inode identifier and offset is used for validating connectivity of the file system blocks to the inodes, and for tracing bad blocks to files that contain the bad blocks.