Vien Ngoc Nguyen

US Patent:

20010043424, Nov 22, 2001

Filed:

Apr 5, 2001

Appl. No.:

09/826685

Inventors:

Vien Nguyen - San Jose CA, US

International Classification:

G11B021/02
G11B005/09
G11B005/596

US Classification:

360/075000, 360/048000, 360/078040

Abstract:

A removable magnetic cartridge provides enhanced data access. The removable magnetic cartridge includes a rigid casing, and a magnetic disk disposed within the rigid casing. The magnetic disk includes a top surface for storage of data, and a bottom surface for storage of data, the bottom surface including at least a first cylinder and a second cylinder, the second cylinder adjacent the first cylinder, the first cylinder having a first plurality of logically numbered servo bursts including a reference servo burst and a secondary servo burst, the secondary servo burst positioned at an angular displacement relative to the reference servo burst, the second cylinder having a second plurality of logically numbered servo bursts including a reference servo burst located at approximately the angular displacement relative to the reference servo burst of the first cylinder.

US Patent:

60921951, Jul 18, 2000

Filed:

Nov 14, 1997

Appl. No.:

8/970340

Inventors:

Vien N. Nguyen - San Jose CA

Assignee:

Castlewood Systems, Inc. - Pleasanton CA

International Classification:

G06F 1214

US Classification:

713200

Abstract:

A technique for authenticating a headerless-ID magnetic disk includes the steps of inserting the headerless-ID magnetic disk having a plurality of defective locations and an encrypted defect map into a removable drive unit, retrieving the encrypted defect map from the magnetic disk, storing the encrypted defect map into a memory in the removable drive unit, decrypting the encrypted defect map to form a defect map identifying the plurality of defective locations, and using the defect map in the memory to provide access to locations on the headerless-ID magnetic disk other than the plurality of defective locations.

US Patent:

49980696, Mar 5, 1991

Filed:

Mar 31, 1989

Appl. No.:

7/331467

Inventors:

Vien Nguyen - Fremont CA
Anand R. Patel - San Jose CA
John A. Blakkan - Santa Clara CA

Assignee:

Tandem Computers Incorporated - Cupertino CA

International Classification:

H04B 346

US Classification:

324539

Abstract:

An apparatus for testing cables, cable connections associated with devices and devices in a daisy chain configuration. Cable malfunctions and cable connection malfunctions can be isolated down to a single device in a daisy chain system by looping back the data bus to the control bus or vice versa. A signal is then sent out on the first bus and received back on the second bus. If a cable malfunction is present, the signal received will not be the same as the signal transmitted.

US Patent:

61045683, Aug 15, 2000

Filed:

Nov 14, 1997

Appl. No.:

8/970881

Inventors:

David Drouin - Milpitas CA
Vien N. Nguyen - San Jose CA
Stephen R. Jackson - San Jose CA

Assignee:

Castlewod Systems, Inc. - Pleasanton CA

International Classification:

G11B 5596
G11B 509

US Classification:

360 7804

Abstract:

A technique for determining a position of a read/write head relative to a magnetic disk includes the steps of providing the magnetic disk having a plurality of odd servo sectors and a plurality of even servo sectors, reading a first gray code pattern in an odd servo sector from the plurality of odd servo sectors on the magnetic disk, reading a second gray code pattern in an even servo sector from the plurality of even servo sectors on the magnetic disk, the even servo sector adjacent to the odd servo sector on the magnetic disk and determining the position of the read/write head only in response to the first gray code pattern and the second gray code pattern.

US Patent:

61919047, Feb 20, 2001

Filed:

Nov 14, 1997

Appl. No.:

8/970866

Inventors:

Vien N. Nguyen - San Jose CA
David Drouin - Milpitas CA

Assignee:

Castlewood Systems, Inc. - Milpitas CA

International Classification:

G11B 509

US Classification:

360 51

Abstract:

A technique for reading data from a magnetic disk includes the steps of providing the magnetic disk including a cylinder having a plurality servo sectors, a plurality of data sectors, and a zone data table, the plurality of servo sectors including a first servo sector, a second servo sector, a third servo sector, a fourth servo sector, and a fifth servo sector, the zone data table including at least a nominal timing latency between the fourth servo sector and a data sector from the plurality of servo sectors, reading the first servo sector, the second servo sector, the third servo sector, and the fourth servo sector from the magnetic disk, determining a first timing deviation for the first servo sector between the first servo sector and the second servo sector, determining a second timing deviation for the second servo sector between the second servo sector and the third servo sector, predicting a predicted third timing deviation for the fourth servo sector between the fourth servo sector and the fifth servo sector, in response to the first timing deviation and to the second timing deviation, modifying the nominal timing latency in response to the predicted third timing deviation to form a predicted timing latency, and waiting the predicted timing latency after reading the fourth servo sector before reading the data sector.

US Patent:

62261428, May 1, 2001

Filed:

May 11, 1998

Appl. No.:

9/075699

Inventors:

David Drouin - Milpitas CA
Vien N Nguyen - San Jose CA
Stephen R. Jackson - San Jose CA

Assignee:

Castlewood Systems, Inc. - Milpitas CA

International Classification:

G11B 5596

US Classification:

360 7708

Abstract:

A technique for formatting a magnetic disk for a removable magnetic cartridge includes the steps of providing the magnetic disk having a top surface and a bottom surface, writing a first servo track onto the top surface, the first servo track having a portion including a first gray code, a first position burst, and a second position burst, writing a second servo track onto the top surface adjacent to the first servo track, the second servo track having a portion including a second gray code, the second position burst, and a third position burst, and writing a third servo track onto the top surface adjacent to the second servo track, the third servo track having a portion including the second gray code, the third position burst and a fourth position burst, wherein a first data track comprises the first servo track, the second servo track and the third servo track.

US Patent:

20210255837, Aug 19, 2021

Filed:

Feb 13, 2020

Appl. No.:

16/790170

Inventors:

- Tokyo, JP
Vien Nguyen - Sugar Land TX, US

Assignee:

YOKOGAWA ELECTRIC CORPORATION - Tokyo

International Classification:

G06F 8/30

Abstract:

An Open Platform Communications (OPC) Unified Architecture (UA) server includes: a storage that stores a configuration file written in a compiled programming language and in which an interpreter is embedded; a transceiver that receives, from an OPC UA client, an execution request to execute a calculation defined in the configuration file; and a processor that executes the calculation using the interpreter.

Address:

8035 Bunker Wood Ln, Houston, TX 77086

Phone:

2815807929

VIN:

4T1BE46K09U815858

Make:

TOYOTA

Model:

CAMRY

Year:

2009