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. 31, 2001
Filed:
Jun. 30, 1998
Method and apparatus for backing up data before updating the data and for restoring from the backups
Applicant:
Inventors:
Edgar J. St. Pierre, Fall River, MA (US);
Alton Gill, Harvard, MA (US);
Madhav Mutalik, Northboro, MA (US);
John Wallace, Franklin, MA (US);
Assignee:
EMC Corporation, Hopkinton, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/314 ;
U.S. Cl.
CPC ...
G06F 1/314 ;
Abstract
Method and apparatus for backing up and restoring data in a computer storage system are disclosed. Data segments are backed up before they are updated. The segments may correspond to physical segments of storage in the computer system. Restoration may proceed by determining which segments have changed since a target time, and retrieving the data backed up from that time. The backups may be stored as differential backups—saving only segments of data that are about to be changed.