STEPHEN HARVEY JACKSON, MD
Anesthesiologist Assistant at Samaritan Dr, San Jose, CA

6226142, May 1, 2001

May 11, 1998

9/075699

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

Castlewood Systems, Inc. - Milpitas CA

G11B 5596

360 7708

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.

6081400, Jun 27, 2000

Nov 14, 1997

8/970859

Li-Hsin Lu - San Jose CA
Stephen R. Jackson - San Jose CA
David Drouin - Milpitas CA

Castlewood Systems, Inc. - Pleasanton CA

G11B 2102, G11B 1546

360 75

A technique for method for positioning a magneto resistive head located upon an actuator arm onto a loading ramp of a storage unit. The technique includes the steps of operating a removable magnetic disk at a first number of revolutions per second, the magnetic disk having an outer diameter, positioning the magneto resistive head adjacent to the removable magnetic disk, reading data from the removable magnetic disk, detecting a reset signal, producing a back electro-motive force in response to the reset signal, biasing the magneto resistive head towards the outer diameter of the removable magnetic disk in response to the reset signal and to the back electro-motive force, reducing a number of revolutions per second for the removable magnetic disk from the first number to a second number of revolutions per second, the first number greater than the second number; thereafter using an energy storage unit to bias the magneto resistive head onto the loading ramp, in response to the reset signal.

2001001, Aug 9, 2001

Nov 30, 2000

09/728738

Li-Hsin Lu - San Jose CA, US
Stephen Jackson - San Jose CA, US
David Drouin - Milpitas CA, US

Castlewood Systems, Inc.

G11B005/596

360/078040, 360/075000

A method for positioning a magneto-resistive head onto an head load/unload ramp of a storage unit, the magneto-resistive head disposed upon an actuator arm, the actuator arm also having a voice coil, includes the steps of detecting a reset signal, generating a back electro-motive force voltage with a spindle motor in response to the reset signal, generating a drive voltage in response to the back electro-motive force voltage, using a switching circuit to provide the drive voltage to the voice coil in a first polarity for a first period of time, and thereafter, using the switching circuit to provide the drive voltage to the voice coil in a second polarity.

6104568, Aug 15, 2000

Nov 14, 1997

8/970881

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

Castlewod Systems, Inc. - Pleasanton CA

G11B 5596, G11B 509

360 7804

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.