David W Petersen

US Patent:

7043665, May 9, 2006

Filed:

Jun 18, 2003

Appl. No.:

10/465726

Inventors:

Robert Frederic Kern - Tucson AZ, US
David B. Petersen - Great Falls VA, US
Rune Willy Ludvig - Stockholm, SE

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 12/16

US Classification:

714 5, 711162, 714 6, 714 7, 714 8

Abstract:

Provided are a method, program, and system for managing data. A mirror policy is processed indicating volumes in a first storage system to mirror to volumes in a second storage system and volumes in the second storage system to mirror to volumes in a third storage system, wherein the third storage system is at a first geographical location remote with respect to a second geographical location including the first and second storage systems. A failure is detected of the first and second storage systems at the first geographical location. Automatic reconfiguration is made to network resources directing I/O requests to volumes in the first storage system to direct I/O requests to volumes in the third storage system. A failure of the first storage system and the availability of the second storage system is detected and, in response, network resources are reconfigured to direct I/O requests to volumes in the first storage system to volumes in the second storage system in response to detecting the failure of the first storage system and the availability of the second storage system. Updates to the second storage system are copied to the third storage system after reconfiguring network resources to direct I/O requests to volumes in the first storage system to volumes in the second storage system.

US Patent:

7467168, Dec 16, 2008

Filed:

Jun 18, 2003

Appl. No.:

10/465111

Inventors:

Robert Frederic Kern - Tucson AZ, US
William Frank Micka - Tucson AZ, US
Gail Andrea Spear - Tucson AZ, US
David B. Petersen - Great Falls VA, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 12/00
G06F 17/30

US Classification:

707204, 707202, 707203

Abstract:

Provided is a method for mirroring data. A mirror policy indicating volumes in a first storage system is processed to mirror to volumes in a second storage system and volumes in the second storage system to mirror to volumes in a third storage system. The third storage system is at a first geographical location remote with respect to a second geographical location including the first and second storage systems. A command is transmitted to cause the copying of updates to the volumes in the first storage system to corresponding volumes in the second storage system indicated in the mirror policy. Upon an occurrence of an event, the causing the suspension of the copying of updates to the volumes in the first storage system indicated in the mirroring policy to the volumes in the second storage system. During the suspension of the copying of volumes between the first and second storage systems, causing the copying of updates to the volumes in the second storage system indicated in the mirroring policy to the volumes in the third storage system indicated in the mirroring policy.

US Patent:

7603581, Oct 13, 2009

Filed:

Mar 17, 2006

Appl. No.:

11/384798

Inventors:

Kenneth Wayne Boyd - Tucson AZ, US
Lisa Joan Gundy - Tucson AZ, US
Nils Torbjorn Kaving - Huddinge, SE
Robert Frederic Kern - Otter Rock OR, US
Gregory Edward McBride - Vail AZ, US
Alan George McClure - Sahuarita AZ, US
William Frank Micka - Tucson AZ, US
David B. Petersen - Great Falls VA, US
Gail Andrea Spear - Tucson AZ, US
Warren Keith Stanley - Loveland CO, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 11/00

US Classification:

714 6, 714 13, 714 18

Abstract:

Provided are a method, system, and program for remote copying of updates to primary and secondary storage locations subject to a copy relationship. A first copy relationship is established between first and second storage locations in a first storage system and second storage system, respectively, wherein updates to the first storage locations are copied to the second storage locations. A second copy relationship is established between the first storage locations in the first copy relationship and third storage locations in a third storage system, wherein updates to the first storage locations are indicated in a first bitmap. A suspended third copy relationship is established between the second storage locations in the first copy relationship and the third storage locations, wherein updates to the second storage locations are indicated in a second bitmap. Updates are copied from the first or second storage locations to the third storage locations, wherein the first or second bitmap is capable of being used to determine updates for the first or second storage locations to copy to the third storage locations.

US Patent:

8027952, Sep 27, 2011

Filed:

Sep 18, 2008

Appl. No.:

12/233535

Inventors:

Robert Frederic Kern - Tucson AZ, US
William Frank Micka - Tucson AZ, US
Gail Andrea Spear - Tucson AZ, US
David B. Petersen - Great Falls VA, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 7/00
G06F 17/00

US Classification:

707610, 707640, 707661, 707674, 707690

Abstract:

Provided is a system and article of manufacture for mirroring data. A mirror policy indicating volumes in a first storage system is processed to mirror to volumes in a second storage system and volumes in the second storage system to mirror to volumes in a third storage system. The third storage system is at a first geographical location remote with respect to a second geographical location including the first and second storage systems. A command is transmitted to cause the copying of updates to the volumes in the first storage system to corresponding volumes in the second storage system indicated in the mirror policy. Upon an occurrence of an event, the causing the suspension of the copying of updates to the volumes in the first storage system indicated in the mirroring policy to the volumes in the second storage system. During the suspension of the copying of volumes between the first and second storage systems, causing the copying of updates to the volumes in the second storage system indicated in the mirroring policy to the volumes in the third storage system indicated in the mirroring policy.

US Patent:

8209282, Jun 26, 2012

Filed:

Sep 19, 2008

Appl. No.:

12/234538

Inventors:

Robert Frederic Kern - Tucson AZ, US
William Frank Micka - Tucson AZ, US
Gail Andrea Spear - Tucson AZ, US
David B. Petersen - Great Falls VA, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 7/00
G06F 17/00

US Classification:

707610, 707640, 707661, 707674, 707690, 714 2

Abstract:

Provided are a system and article of manufacture for mirroring data. A mirror policy indicating volumes in a first storage system is processed to mirror to volumes in a second storage system and volumes in the second storage system to mirror to volumes in a third storage system. The third storage system is at a first geographical location remote with respect to a second geographical location including the first and second storage systems. A command is transmitted to cause the copying of updates to the volumes in the first storage system to corresponding volumes in the second storage system indicated in the mirror policy. Upon an occurrence of an event, the causing the suspension of the copying of updates to the volumes in the first storage system indicated in the mirroring policy to the volumes in the second storage system. During the suspension of the copying of volumes between the first and second storage systems, causing the copying of updates to the volumes in the second storage system indicated in the mirroring policy to the volumes in the third storage system indicated in the mirroring policy.

US Patent:

61990744, Mar 6, 2001

Filed:

Apr 5, 1999

Appl. No.:

9/286389

Inventors:

Robert Frederic Kern - Tucson AZ
William Frank Micka - Tucson AZ
Jeffrey Mark Nick - Fishkill NY
Larry Richard Perry - Gilroy CA
David Bradley Petersen - Great Falls VA
Harold Glen Slone - Los Gatos CA
Gail Andrea Spear - Tucson AZ
Harry Morris Yudenfriend - Poughkeepsie NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1730

US Classification:

707204

Abstract:

A database management system ensures consistency between primary and mirrored backup copies of a database, despite occurrence of a suspending condition interrupting the normal process of mirroring the primary database. One or more primary controllers are provided, each having a data storage unit with multiple primary data storage devices. Multiple secondary controllers each have multiple associated secondary data storage devices, each secondary controller being coupled to one primary controller. One or more primary databases reside on the primary devices, with a corresponding number of secondary databases residing on the secondary devices. Each secondary database mirrors a corresponding primary database. Either a host, attached to a primary controller, or one of the primary controllers itself, maintains a map cross-referencing each primary and secondary database with the primary and secondary devices containing portions thereof. If a predefined "suspending condition" affecting data mirroring occurs, the host or primary controller consults its map to identify all primary and secondary devices affected by the condition.

US Patent:

20190012243, Jan 10, 2019

Filed:

Sep 11, 2018

Appl. No.:

16/128435

Inventors:

- Armonk NY, US
Michael Frankenberg - Saerbeck, DE
Alan G. McClure - Sahuarita AZ, US
David B. Petersen - Great Falls VA, US
Daniel Roman - Saint Drezery, FR
Gail A. Spear - Tucson AZ, US
John G. Thompson - Tucson AZ, US

International Classification:

G06F 11/16
G06F 11/20

Abstract:

Provided are a computer program product, system, and method for performing a failover between a first storage system and a second storage system. Data is synchronized between the first storage system and the second storage system. A failover is performed from the first storage system to the second storage system in response to a failover event at the first storage system while synchronizing the data. A determination is made that a first storage unit of the first storage system is inoperable and that that a second storage unit of the first storage system is operable in response to the failover event. In response to determining that the second storage unit is operable, a resynchronization is initiated to copy updates to a second storage unit of the second storage system mirroring the second storage unit of the first storage system to the second storage unit of the first storage system.

US Patent:

20160328303, Nov 10, 2016

Filed:

May 5, 2015

Appl. No.:

14/704893

Inventors:

- Armonk NY, US
Michael Frankenberg - Saerbeck, DE
Alan G. McClure - Sahuarita AZ, US
David B. Petersen - Great Falls VA, US
Daniel Roman - Saint Drezery, FR
Gail A. Spear - Tucson AZ, US
John G. Thompson - Tucson AZ, US

International Classification:

G06F 11/16
G06F 11/20

Abstract:

Provided are a computer program product, system, and method for performing a failover between a first storage system and a second storage system. Data is synchronized between the first storage system and the second storage system. A failover is performed from the first storage system to the second storage system in response to a failover event at the first storage system while synchronizing the data. A determination is made that a first storage unit of the first storage system is inoperable and that that a second storage unit of the first storage system is operable in response to the failover event. In response to determining that the second storage unit is operable, a resynchronization is initiated to copy updates to a second storage unit of the second storage system mirroring the second storage unit of the first storage system to the second storage unit of the first storage system.