Harry M Yudenfriend

US Patent:

6336193, Jan 1, 2002

Filed:

Aug 21, 1998

Appl. No.:

09/137947

Inventors:

Harry Morris Yudenfriend - Poughkeepsie NY
John Andrew Staubi - Poughkeepsie NY
Michael G. Fitzpatrick - Raleigh NC

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H02H 305

US Classification:

714 15, 714 2

Abstract:

Error recovery is performed when an error rate for a subsystem of a computer environment (e. g. , an Input/Output (I/O) subsystem) is greater than a predefined value and a critical resource of the computer environment (e. g. , storage) is experiencing a shortage. Error recovery may include slowing down activity of the devices associated with the subsystem and/or simulating errors for the subsystem. The simulation of the errors does not require a large block of additional storage, and thus, the shortage situation is not exacerbated.

US Patent:

6336194, Jan 1, 2002

Filed:

Oct 29, 1998

Appl. No.:

09/181966

Inventors:

Kirby G. Dahman - Tuscon AZ
Gavin S. Johnson - Aromas CA
Larry R. Perry - Gilroy CA
Harry M. Yudenfriend - Poughkeepsie NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1100

US Classification:

714 17, 710 15

Abstract:

Repositioning within an input/output device is accomplished without any knowledge of where the input/output device is currently positioned. The input/output device is repositioned to a predetermined position, in order for a program to be retried. The predetermined position is determined from a previously executed program. The previously executed program is scanned looking for commands. For each command found, a position identifier is adjusted based upon the type of command. When the scan and adjustments are complete, the position identifier represents the predetermined position used for repositioning the input/output device.

US Patent:

6338145, Jan 8, 2002

Filed:

Aug 21, 1998

Appl. No.:

09/138104

Inventors:

Harry Morris Yudenfriend - Poughkeepsie NY
John Andrew Staubi - Poughkeepsie NY
Michael G. Fitzpatrick - Raleigh NC

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H02H 305

US Classification:

714 2, 714 15

Abstract:

Error recovery is performed when an error rate for a subsystem of a computer environment (e. g. , an Input/Output (I/O) subsystem) is greater than a predefined value and a critical resource of the computer environment (e. g. , storage) is experiencing a shortage. Error recovery may include slowing down activity of the devices associated with the subsystem and/or simulating errors for the subsystem. The simulation of the errors does not require a large block of additional storage, and thus, the shortage situation is not exacerbated.

US Patent:

6338151, Jan 8, 2002

Filed:

Aug 21, 1998

Appl. No.:

09/137997

Inventors:

Harry Morris Yudenfriend - Poughkeepsie NY
John Andrew Staubi - Poughkeepsie NY
Michael G. Fitzpatrick - Raleigh NC

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H02H 305

US Classification:

714 47, 714 15

Abstract:

Error recovery is performed when an error rate for a subsystem of a computer environment (e. g. , an Input/Output (I/O) subsystem) is greater than a predefined value and a critical resource of the computer environment (e. g. , storage) is experiencing a shortage. Error recovery may include slowing down activity of the devices associated with the subsystem and/or simulating errors for the subsystem. The simulation of the errors does not require a large block of additional storage, and thus, the shortage situation is not exacerbated.

US Patent:

6339799, Jan 15, 2002

Filed:

Oct 29, 1998

Appl. No.:

09/181744

Inventors:

Kirby G. Dahman - Tuscon AZ
Gavin S. Johnson - Aromas CA
Larry R. Perry - Gilroy CA
Harry M. Yudenfriend - Poughkeepsie NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1314

US Classification:

710 21, 709203, 711147, 711157, 714 6

Abstract:

Repositioning within an input/output device is accomplished without any knowledge of where the input/output device is currently positioned. The input/output device is repositioned to a predetermined position, in order for a program to be retried. The predetermined position is determined from a previously executed program. The previously executed program is scanned looking for commands. For each command found, a position identifier is adjusted based upon the type of command. When the scan and adjustments are complete, the position identifier represents the predetermined position used for repositioning the input/output device.

US Patent:

6343335, Jan 29, 2002

Filed:

Oct 29, 1998

Appl. No.:

09/181704

Inventors:

Kirby G. Dahman - Tuscon AZ
Gavin S. Johnson - Aromas CA
Larry R. Perry - Gilroy CA
Harry M. Yudenfriend - Poughkeepsie NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1314

US Classification:

710 21, 709203, 711147, 711157, 714 6

Abstract:

Repositioning within an input/output device is accomplished without any knowledge of where the input/output device is currently positioned. The input/output device is repositioned to a predetermined position, in order for a program to be retried. The predetermined position is determined from a previously executed program. The previously executed program is scanned looking for commands. For each command found, a position identifier is adjusted based upon the type of command. When the scan and adjustments are complete, the position identifier represents the predetermined position used for repositioning the input/output device.

US Patent:

6381642, Apr 30, 2002

Filed:

Oct 21, 1999

Appl. No.:

09/422574

Inventors:

Michael E. ODonnell - Westminster CO
Robert John Gallagher - Hurley NY
Peter Holmes - Poughkeepsie NY
Harry Morris Yudenfriend - Poughkeepsie NY

Assignee:

McDATA Corporation - Broomfield CO
International Business Machines Corporation - Armonk NY

International Classification:

G06F 15173

US Classification:

709224, 710 16

Abstract:

An in-band method/apparatus whereby a host is enabled to secure predetermined operational information relative to predetermined ports of a fiber channel switch. A set command is generated at the host and sent in-band to the switch. The information content of the set command defines the ports for which operational-parameters are to be monitored. The information content of the set command also defines which operational parameters are to be monitored. In response to receiving the set command, the switch establishes statistical counters for monitoring port operational parameters in accordance with received operational parameter identifiers. An accept signal is then sent in-band to the host, and a time period of port monitoring begins. After a predefined time period has expired, the host sends a read command in-band to the switch. The switch now generates a monitor record in accordance with the count content of the statistical counters that were established in response to the set command.

US Patent:

6567841, May 20, 2003

Filed:

Sep 28, 1999

Appl. No.:

09/407514

Inventors:

William J. Rooney - Hopewell Junction NY
Harry M. Yudenfriend - Poughkeepsie NY
Jeffrey P. Kubala - Poughquag NY
Eugene P. Hefferon - Poughkeepsie NY
Carol B. Hernandez - Wappingers Falls NY

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 900

US Classification:

709104

Abstract:

An exemplary embodiment is a method for creating and identifying different kinds of groups of cooperating system images within a single machine, a single central processor complex (CPC) where each kind of group has a different functional purpose. Such a collection of cooperating system images is referred to as a logical partition cluster (LPC). An LPC is created or identified using a diagnose instruction. The diagnose instruction includes a subcode field designating a function to be performed and a logical partition cluster type field indicating the type of logical partition cluster said function is to be performed on.