Yoo S Kim

US Patent:

6493173, Dec 10, 2002

Filed:

Nov 8, 1999

Appl. No.:

09/436930

Inventors:

Yoo H. Kim - Laguna Niguel CA
Hanan Kupferman - Diamond Bar CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

G11B 1546

US Classification:

360 7704

Abstract:

A disk drive is disclosed comprising a track recorded on a disk, wherein the track has repeatable runout (RRO). The track comprises a plurality of embedded servo sectors including servo information stored at a servo data rate, and a plurality of data sectors between the embedded servo sectors. The track is headerless in that the plurality of data sectors are uninterrupted by sector identification data. One of the plurality of data sectors includes a RRO correction value used to compensate for the RRO, the RRO correction value being stored at a user data rate different than the servo data rate. The disk drive further comprises a head and a voice coil motor (VCM) for positioning the head over the track. A servo control system, responsive to the servo information and the RRO correction value, generates a VCM control signal that is applied to the VCM for positioning the head over the track.

US Patent:

6545830, Apr 8, 2003

Filed:

Apr 30, 2001

Appl. No.:

09/846805

Inventors:

Albert W. Briggs - Newport Beach CA
Phat T. Nguyen - Laguna Niguel CA
Yoo H. Kim - Laguna Niguel CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

G11B 2736

US Classification:

360 31, 360 48, 360 7708, 360 7814

Abstract:

A disk drive is disclosed comprising a disk having a plurality of tracks including a plurality of data tracks and a plurality of reserved tracks. A plurality of embedded servo sectors are dispersed circumferentially around the tracks, the tracks are banded together to form a plurality of zones, each data track comprises a plurality of data sectors each having a first number of bits for storing user data, and each reserved track comprises calibration sectors each having a second number of bits for storing a calibration test pattern, wherein the second number of bits is greater than the first number of bits.

US Patent:

6545835, Apr 8, 2003

Filed:

Aug 31, 2000

Appl. No.:

09/652857

Inventors:

Raffi Codilian - Irvine CA
Hanan Kupferman - Diamond Bar CA
Yoo H. Kim - Laguna Niguel CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

G11B 5596

US Classification:

360 7704, 360 7702

Abstract:

The present invention may be embodied in a method, and related apparatus, for determining a repeatable runout (RRO) compensation value set for a track on a disk in a disk drive, wherein the disk drive is initially manufactured and then shipped for installation in a host system. The track comprises a plurality of embedded servo sectors that define a circumferential path having RRO which requires compensation during track following. The method comprises determining a first RRO compensation value set for the track to a first desired learning level by measuring the RRO for the track based on a first predetermined number of disk rotations during the initial manufacturing of the disk drive. Then, after the disk drive is shipped for installation in the host system, determining a second RRO compensation value set for the track to a second desired learning level by measuring the RRO for the track based on at least a second predetermined number of disk rotations, wherein the second predetermined number of disk rotations is greater than the first predetermined number of disk rotations. The learning technique of the invention allows the disk drive to be shipped for installation in a host system with a portion of its tracks having little or no RRO compensation. After shipment, the disk drive may continue to improve the RRO compensation until all of the tracks have been optimally compensated.

US Patent:

6611393, Aug 26, 2003

Filed:

Apr 30, 2001

Appl. No.:

09/846043

Inventors:

Phat T. Nguyen - Laguna Niguel CA
Yoo H. Kim - Laguna Niguel CA
Albert W. Briggs - Newport Beach CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

G11B 509

US Classification:

360 53, 360 69, 360 31

Abstract:

A disk drive is disclosed which calibrates at least one zone parameter in the field. During an active state of the disk drive, read errors are detected and corresponding entries are stored in an error list. During an off-line state, the error list is processed in order to calibrate at least one zone parameter.

US Patent:

6687078, Feb 3, 2004

Filed:

Feb 28, 2001

Appl. No.:

09/797547

Inventors:

Yoo H. Kim - Laguna Niguel CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

G11B 5596

US Classification:

360 7704, 360 7708, 360 7804

Abstract:

The present invention may be regarded as a disk drive comprising a disk having a plurality of data tracks and at least one reserved track. At least one of the data tracks for recording user data along a circumferential path offset from the centerline of the data track, and the at least one reserved track for recording data track micro-jog values along a circumferential path substantially aligned with the centerline of the reserved track.

US Patent:

6690523, Feb 10, 2004

Filed:

Apr 30, 2001

Appl. No.:

09/846075

Inventors:

Phat T. Nguyen - Laguna Niguel CA
Yoo H. Kim - Laguna Niguel CA
Albert W. Briggs - Newport Beach CA

Assignee:

Western Digital Technologies, Inc. - Lake Forest CA

International Classification:

G11B 2736

US Classification:

360 31

Abstract:

A disk drive is disclosed which calibrates at least one zone parameter in the field. During an off-line state of the disk drive, at least one of the adapted zone parameters is calibrated. During an active state of the disk drive, a read error is detected and a data-recovery firmware procedure is executed using adapted zone parameters in an attempt to recover data associated with the read error. If the data is successfully recovered from the data sector using the data-recovery firmware procedure, an adapted zone parameter counter is incremented and the operating zone parameters are updated with the adapted zone parameters if the adapted zone parameter counter exceeds a predetermined threshold.

US Patent:

20050244800, Nov 3, 2005

Filed:

Feb 9, 2005

Appl. No.:

10/906228

Inventors:

Yoo Seung Kim - Los Angeles CA, US
Jennifer Kim - Los Angeles CA, US

International Classification:

G09B019/00

US Classification:

434245000

Abstract:

A portable virtual personality cultivation device to aid the teachings of the various religious scripts. The inventive device includes an input and output device as well as display device to alert the user of the processed information, i.e. quantified value of person's character based on various religious teachings. The device can be a hardware by itself or be installed as a part of various portable devices. The device can also be installed internally as a computer software.

US Patent:

20060116925, Jun 1, 2006

Filed:

Nov 29, 2004

Appl. No.:

10/904780

Inventors:

Yoo Seung Kim - Los Angeles CA, US
Jennifer Kim - Los Angeles CA, US

International Classification:

G06Q 30/00

US Classification:

705014000

Abstract:

The present invention provides a method(s) for marketing by providing information of life in a foreign country and/or area, including but not limited to advertisements via CD-ROM, in the airplane, other transportation vehicles, and/or terminals, mainly but not limited to international aircrafts transporting international passengers en route to a new country of destination, in a language comfortable for the passenger. All the information that must be stored in this CD-ROM are converted and organized into electronic format to fit and to be transferred to the provided space of the web page style segmentation. This CD-ROM is distributed via 1) the various transportation companies to their passengers for free or minimal cost, and/or 2) agents at the transportation terminals. All the advertisers can provide their advertisement in many different ways including video, audio, picture, graphics, and etc. The above is also converted to a website with the option to download for the purpose of printing and/or transferring to a cellular phone and/or other electronic devices and/or discs.