Kirby G Dahman

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:

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:

6473829, Oct 29, 2002

Filed:

May 28, 1999

Appl. No.:

09/322010

Inventors:

Kirby Grant Dahman - Tuscon AZ
Douglas William Dewey - Tuscon AZ

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1200

US Classification:

711112, 711162, 709248, 707201

Abstract:

A system and method, employing a data storage device, for providing communication between a plurality of processing units which are respectively unconnected to each other, with the processing units each separately coupled to the data storage device. The data storage device is coupled to the processing units by means of peripheral or storage interfaces, each coupled to one of the processing units for receiving commands and signals sent from each of the processing units and for supplying signals to each of the processing units. A controller coupled to the storage interfaces and to a buffer, recognizes âbroadcastâ commands and any message accompanying the âbroadcastâ commands, and recognizes âread messageâ commands, received from the processing units. The controller stores the message accompanying the âbroadcastâ command in the buffer, and the controller forwards, at the storage interfaces, a âmessage readyâ signal to at least one of the processing units. The processing units then send a âread messageâ command to the data storage device.

US Patent:

6519678, Feb 11, 2003

Filed:

Sep 10, 2001

Appl. No.:

09/948656

Inventors:

Robert Beverley Basham - Aloha OR
Kirby Grant Dahman - Tucson AZ
Leonard George Jesionowski - Tucson AZ

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1200

US Classification:

711112, 700214, 700225, 700245, 369 3028, 360 9801

Abstract:

Drive image providers of a virtualization system for an automated data storage library provide an image of a fixed plurality of virtual data storage drives with fixed identifications to a host application. A drive resource provider, at any one time, assigns any number âmâ of a pool of ânâ drives to the drive image providers, and ânâ-âmâ of the pool are freed and available for assignment. The drive resource provider responds to a triggering event requesting a drive, and dedicates one of the ânâ-âmâ drives of the pool to the virtual drive. The drive image provider characterizes and directs communication between the host and the dedicated drive as a fixed virtual drive; and prior to the dedication of a drive, characterizes the virtual drive to the requesting host application as ânot readyâ.

US Patent:

6636778, Oct 21, 2003

Filed:

Sep 10, 2001

Appl. No.:

09/948627

Inventors:

Robert Beverley Basham - Aloha OR
Kirby Grant Dahman - Tucson AZ
Leonard George Jesionowski - Tucson AZ

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 700

US Classification:

700214, 700225, 711112, 360 9801, 369 3006, 369 3028, 36917801

Abstract:

Data storage drives of an automated data storage library are allocated to received requests. A drive resource provider, upon receiving a request for a drive when all of the drives of the pool are allocated, holds any mount of a portable data storage cartridge relative to the request, releasing the hold when a drive is allocated. Spare drives are provided, outside of the pool. A spare drive may be allocated in response to the request, and a message is posted indicating use of the spare data storage drive. The posted message may comprise a notification that action may be taken to permanently transfer a spare data storage drive to the pool.

US Patent:

6711580, Mar 23, 2004

Filed:

Oct 1, 2001

Appl. No.:

09/968452

Inventors:

Kirby Grant Dahman - Tucson AZ
Kathryn Eileen Eldred - Tucson AZ
Gavin Stuart Johnson - Aromas CA
Jon Arthur Lynds - San Jose CA
Wayne Erwin Rhoten - Morgan Hill CA

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

R06F 1730

US Classification:

707102, 707101

Abstract:

A method to record information on a data storage medium using buffered tape marks. A data storage device comprising a computer useable medium having computer readable program code disposed therein for implementing Applicants method to record information on a data storage medium using buffered tape marks. A data storage and retrieval system comprising a computer useable medium having computer readable program code disposed therein for implementing Applicants method to record information on a data storage medium using buffered tape marks. Computer program products embodied as program code stored in one or more memory devices, such as a magnetic disk, a magnetic tape, or other non-volatile memory device disposed in a host computer, a data storage device, and/or a library controller.

US Patent:

6725350, Apr 20, 2004

Filed:

Oct 1, 2001

Appl. No.:

09/968603

Inventors:

Lyn Lequam Ashton - Tucson AZ
Kirby Grant Dahman - Tucson AZ
Erika Marianna Dawson - Tucson AZ
Kathryn Eileen Eldred - Tucson AZ
Gavin Stuart Johnson - Aromas CA
Jon Arthur Lynds - San Jose CA
Michael Ray Noel - Tucson AZ
Anthony Steve Pearson - Tucson AZ
James Mitchell Ratliff - Benson AZ
Wayne Erwin Rhoten - Morgan Hill CA

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1200

US Classification:

711172

Abstract:

A storage management system, apparatus, and method to increase the storage capacity of data storage media. Applicants method uses a data storage device comprising a fixed device architecture, where that data storage device is capable of operating in a first capacity mode or in a second capacity mode, and where that data storage device is capable of switching between the first capacity mode and the second capacity mode. In certain embodiments, the first capacity mode utilizes a 22 bit blockid format and the second capacity mode utilizes a 32 bit blockid format. In other embodiments, the first capacity mode utilizes a 32 bit blockid format and the second capacity mode utilizes a 22 bit blockid format. A computer code product comprising a data management system which includes an operating system and data storage device microcode, which supports the capability to switch between alternative information storage architectures, and thereby, increase the capacity utilization of data storage media. A data storage and retrieval system comprising a computer useable medium having computer readable program code disposed therein for implementing Applicants method to switch between use of alternative information storage architectures, and thereby, to increase the capacity utilization of data storage media.