Susan M Spence

US Patent:

20070100909, May 3, 2007

Filed:

Oct 31, 2005

Appl. No.:

11/264571

Inventors:

Michael Padovano - Englishtown NJ, US
Michael Byrnes - Dunellen NJ, US
Charles Christian - Basking Ridge NJ, US
Laura Clemens - Colorado Springs CO, US
Rodger Daniels - Boise ID, US
Donald Fraser - Colorado Springs CO, US
Deborah Levinson - Colorado Springs CO, US
James Reuter - Colorado Springs CO, US
Susan Spence - Palo Alto CA, US
Christopher Stroberger - Colorado Springs CO, US

International Classification:

G06F 17/30

US Classification:

707204000

Abstract:

In a storage system, at least three storage sites are arranged in a full mirroring relationship using a virtual connection between instances of a storage group on two of the sites whereby no user data is transmitted.

US Patent:

20070294314, Dec 20, 2007

Filed:

Jun 16, 2006

Appl. No.:

11/454755

Inventors:

Michael Padovano - Bridgewater NJ, US
Michael G. Byrnes - Bridgewater NJ, US
Charles E. Christian - Bridgewater NJ, US
Laura Clemens - Colorado Springs CO, US
Rodger Daniels - Boise ID, US
Deborah Levinson - Colorado Springs CO, US
Susan Spence - Palo Alto CA, US
Christopher Stroberger - Colorado Springs CO, US

International Classification:

G06F 17/30

US Classification:

707201

Abstract:

In one embodiment, a method for bitmap based synchronization of a source volume and a target volume comprises obtaining, in a source controller, a synchronization timestamp, and for one or more bits in a bitmap representing the source volume, transmitting a synchronization request to the target volume, wherein the synchronization request comprises the synchronization timestamp, receiving a reply from the target volume, and clearing the bit in the bitmap in response to the reply from the target volume.