Jason A Gregg

US Patent:

6445531, Sep 3, 2002

Filed:

Oct 8, 1999

Appl. No.:

09/415787

Inventors:

Mark A. Gaertner - Woodbury MN
Paul A. Galloway - Prior Lake MN
Bruce J. Routh - Eden Prairie MN
Zip Cotter - Eden Prairie MN
Daniel C. Kuhl - Saint Paul MN
Jason D. Gregg - Oklahoma City OK

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G11B 5596

US Classification:

360 7806

Abstract:

A method of controlling an actuator in a disc drive to move a data head to implement an access in accordance with the invention includes determining a first rotational position corresponding to a rotational position of the data head when the access will start and determining a second rotational position corresponding to a rotational position of the data head at a destination of the access. Subsequently, an access time required to move the data head from the first rotational position on a current or initial track to the second rotational position on a destination track using a fastest of multiple seek profiles is determined. A slower or slowest of the multiple seek profiles which can be used to move the data head from the first track to the second track within the access time is determined. Subsequently, the actuator is controlled using the determined slower or slowest of the multiple seek profiles to implement the access. In addition, a disc drive is provided.

US Patent:

7539814, May 26, 2009

Filed:

Jun 26, 2003

Appl. No.:

10/606597

Inventors:

Brian R. Pollock - Eden Prairie MN, US
Reed David Hanson - Chaska MN, US
Nathaniel Boyd Wilson - Edmond OK, US
Jason Dale Gregg - Longmont CO, US
Mark Larry Birtzer - Lake City MN, US

Assignee:

Seagate Technology LLC - Scotts Valley CA

International Classification:

G06F 12/00
G06F 13/00
G06F 13/28
G11B 21/08

US Classification:

711112, 369 301

Abstract:

A processor is configured to perform a method () including a step of deriving lateral offset indicators () from a longitudinal position measurement (). Improved seek cost indicators () are generated, some or all based on a respective lateral offset indicator (). Then a target destination is selected using at least one of the improved seek cost indicators ().