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:
May. 30, 2006
Filed:
Dec. 27, 2002
Moshe Yanai, Brookline, MA (US);
Natan Vishlitzky, Brookline, MA (US);
Bruno Alterescu, Newton, MA (US);
Daniel Castel, Framingham, MA (US);
Gadi Shklarsky, Brookline, MA (US);
Yuval Ofek, Hopkinton, MA (US);
Moshe Yanai, Brookline, MA (US);
Natan Vishlitzky, Brookline, MA (US);
Bruno Alterescu, Newton, MA (US);
Daniel Castel, Framingham, MA (US);
Gadi Shklarsky, Brookline, MA (US);
Yuval Ofek, Hopkinton, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a remotely mirrored volume pair. Normally, a host computer directly accesses either a local or a primary volume, and data written to a primary volume is automatically sent over the link to a corresponding secondary volume. Each remotely mirrored volume pair can operate in a selected synchronization mode including synchronous, semi-synchronous, adaptive copy—remote write pending, and adaptive copy—disk. Direct write access to a secondary volume is denied if a 'sync required' attribute is set for the volume and the volume is not synchronized.