Timothy A Larson

US Patent:

7493370, Feb 17, 2009

Filed:

Oct 29, 2004

Appl. No.:

10/977774

Inventors:

Brian Eric Bakke - Rochester MN, US
Robert Edward Galbraith - Rochester MN, US
Brian James King - Rochester MN, US
Timothy James Larson - LaCrosse WI, US
Timothy Jerry Schimke - Stewartville MN, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 15/13

US Classification:

709208, 709200, 709209, 710 8, 710 9, 710 10, 703 24, 703 25

Abstract:

A method and apparatus are provided for dynamically determining a primary adapter in a heterogeneous N-way adapter configuration. Each of the adapters generates information about itself and exchanges the information with all other adapters. First a decision-making adapter is identified. Then the decision-making adapter compares the adapter-generated information of all the adapters and makes a decision determining the primary adapter. The decision-making adapter communicates the decision to all other adapters. The determined primary adapter assumes a role as the primary adapter and the other adapters assume a role as a secondary adapter.

US Patent:

7925837, Apr 12, 2011

Filed:

Mar 4, 2008

Appl. No.:

12/041807

Inventors:

Joseph Roger Edwards - Rochester MN, US
Robert Edward Galbraith - Rochester MN, US
Adrian Cuenin Gerhard - Rochester MN, US
Timothy James Larson - LaCrosse WI, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 13/14

US Classification:

711141

Abstract:

A method, computer program product and computer system for maintaining write cache and parity update footprint coherency in a multiple storage adaptor configuration for storage adaptors in a storage subsystem, which includes providing atomic updating of the storage adaptors and the attached disk drives, enabling runtime addition and runtime subtraction of a storage adaptor in the multiple storage adaptor configuration, and maintaining write cache and parity update footprint coherency using atomic updating, runtime addition and runtime subtraction of a storage adaptor.

US Patent:

7979655, Jul 12, 2011

Filed:

Mar 4, 2008

Appl. No.:

12/041800

Inventors:

Joseph Roger Edwards - Rochester MN, US
Robert Edward Galbraith - Rochester MN, US
Adrian Cuenin Gerhard - Rochester MN, US
Timothy James Larson - LaCrosse WI, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 13/00

US Classification:

711162

Abstract:

A method, computer program product and system for dynamically optimizing the limit and the thresholds of a write cache for a storage adapter connected to storage devices, includes measuring continually an overall locality of data in the write cache for the storage devices, calculating the limit of the write cache dynamically for each storage device using the overall locality and a device-related information, and calculating the threshold of the write cache dynamically for each storage device by combining a fair amount and a device-related additional amount.

US Patent:

8195589, Jun 5, 2012

Filed:

Jun 11, 2008

Appl. No.:

12/137386

Inventors:

Brian Eric Bakke - Rochester MN, US
Robert Edward Galbraith - Rochester MN, US
Brian James King - Rochester MN, US
Timothy James Larson - LaCrosse WI, US
Timothy Jerry Schimke - Stewartville MN, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 17/00
G06N 5/00

US Classification:

706 45, 709208, 370310

Abstract:

A method and apparatus are provided for dynamically determining a primary adapter in a heterogeneous N-way adapter configuration. Each of the adapters generates information about itself and exchanges the information with all other adapters. First a decision-making adapter is identified. Then the decision-making adapter compares the adapter-generated information of all the adapters and makes a decision determining the primary adapter. The decision-making adapter communicates the decision to all other adapters. The determined primary adapter assumes a role as the primary adapter and the other adapters assume a role as a secondary adapter.

US Patent:

20070028136, Feb 1, 2007

Filed:

Oct 15, 2005

Appl. No.:

11/163346

Inventors:

Carl FORHAN - Rochester MN, US
Robert GALBRAITH - Rochester MN, US
Adrian GERHARD - Rochester MN, US
Timothy LARSON - Byron MN, US
William MAITLAND - Rochester MN, US

Assignee:

ADAPTEC, INC. - Milpitas CA

International Classification:

G06F 11/00

US Classification:

714006000

Abstract:

Parity Update Footprints (PUFPs) are kept on the disk drives themselves (rather than in nonvolatile RAM) so that the PUFPs will move along with the RAID arrays and data they protect. This permits effective detection of and recovery from many unexpected-power-loss events, and certain other types of failures, even in a clustered-adapter configuration or with a standalone adapter that has no nonvolatile RAM or only a little nonvolatile RAM. Desirably, many Set PUFP and Clear PUFP operations can be coalesced into each write to the block on the disk which contains the PUFPs, thereby improving system performance.

US Patent:

20120001065, Jan 5, 2012

Filed:

Mar 12, 2010

Appl. No.:

13/256121

Inventors:

Jesse C. Seegmiller - Rochester MN, US
John C. Lieske - Rochester MN, US
Timothy S. Larson - Rochester MN, US
Bradley E. Burns - Stewartville MN, US

Assignee:

Mayo Foundation for Medical Education and Rsearch - Rochester MN

International Classification:

H01J 49/26

US Classification:

250282

Abstract:

This document relates to methods and materials involved in evaluating renal function in a subject. For example, methods and materials for evaluating renal clearance using mass spectrometry techniques are provided.

US Patent:

20120278528, Nov 1, 2012

Filed:

Apr 28, 2011

Appl. No.:

13/096222

Inventors:

Robert E. Galbraith - Rochester MN, US
Murali N. Iyer - Rochester MN, US
Timothy J. Larson - LaCrosse WI, US
Steven P. Norgaard - Rochester MN, US

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

International Classification:

G06F 12/02

US Classification:

711103, 711E12008

Abstract:

A method and controller for implementing enhanced flash backed dynamic random access memory (DRAM) management, and a design structure on which the subject controller circuit resides are provided. An input/output adapter (IOA) includes at least one super capacitor, a data store (DS) dynamic random access memory (DRAM), a flash memory, a non-volatile random access memory (NVRAM), and a flash backed DRAM controller. Responsive to an adapter reset, Data Store DRAM testing including restoring a DRAM image from Flash to DRAM and testing of DRAM is performed. Mirroring of RAID configuration data and RAID parity update footprints between the NVRAM and DRAM is performed. Save of DRAM contents to the flash memory is controllably enabled when super capacitors have been sufficiently recharged and the flash memory erased.

US Patent:

20130046930, Feb 21, 2013

Filed:

Sep 7, 2012

Appl. No.:

13/606932

Inventors:

Evangelos S. Eleftheriou - Rueschlikon, CH
Robert Galbraith - Rochester MN, US
Adrian C. Gerhard - Rochester MN, US
Robert Haas - Rueschlikon, CH
Xiao-Yu Hu - Rueschlikon, CH
Murali N. Iyer - Rochester MN, US
Ioannis Koltsidas - Rueschlikon, CH
Timothy J. Larson - Rochester MN, US
Steven P. Norgaard - Rochester MN, US
Roman Pletka - Rueschlikon, CH

Assignee:

INTERNATIONAL BUSINESS MACHINES CORPORATION - Armonk NY

International Classification:

G06F 12/08

US Classification:

711112, 711E12019

Abstract:

A method for optimizing locations of physical data accessed by one or more client applications interacting with a storage system, with the storage system comprising at least two redundancy groups having physical memory spaces and data bands. Each of the data bands corresponds to physical data stored on several of the physical memory spaces. A virtualized logical address space includes client data addresses utilizable by the one or more client applications. A storage controller is configured to map the client data addresses onto the data bands, such that a mapping is obtained, wherein the one or more client applications can access physical data corresponding to the data bands.