Donald B Adams

US Patent:

6487646, Nov 26, 2002

Filed:

Feb 29, 2000

Appl. No.:

09/515408

Inventors:

Donald Adams - Pleasanton CA
David Chandler Platt - Mountain View CA
Stephen Lacey - Mountain View CA

Assignee:

Maxtor Corporation - Longmont CO
TiVo, Inc. - Sunnyvale CA

International Classification:

G06F 1200

US Classification:

711163, 711164, 713200

Abstract:

The present invention is related to a data storage device capable of restricting access to data storage or retrieval when a first code is incompatible with a second code. The data storage device comprises (a) a data storage media having a data storage region; and (b) a controller adapted to compare a first code with a second code and to restrict access to a portion of the data storage region of the data storage device if the first code is incompatible with the second code.

US Patent:

7196862, Mar 27, 2007

Filed:

Sep 11, 2000

Appl. No.:

09/659481

Inventors:

Donald Adams - Pleasanton CA, US
Ahmed Al-Mehdi - Fremont CA, US

Assignee:

Maxtor Corporation - Longmont CO

International Classification:

G11B 5/09

US Classification:

360 51

Abstract:

A rotatable storage media includes a first data segment stored in first tracks and a second data segment stored in second tracks. The first tracks include a first start track and a first end track, and the second tracks include a second start track and a second end track. The first data segment starts in the first start track at a start rotational phase, ends in the first end track at an end rotational phase, starts in adjacent first tracks at start rotational phases offset by an intra-segment rotational skew angle and ends in adjacent first tracks at end rotational phases offset by the intra-segment rotational skew angles. The second data segment starts in the second start track at the start rotational phase, ends in the second end track at the end rotational phase, starts in adjacent second tracks at start rotational phases offset by the intra-segment rotational skew angle and ends in adjacent second tracks at end rotational phases offset by the intra-segment rotational skew angle. Furthermore, the first and second data segments are radially coherent, and the start and end rotational phases are offset by an inter-segment rotational skew angle that is greater than the intra-segment rotational skew angle.

US Patent:

7280301, Oct 9, 2007

Filed:

Oct 7, 2004

Appl. No.:

10/962216

Inventors:

Robert Jackson - Union City CA, US
Donald E. Adams - Pleasanton CA, US

Assignee:

Maxtor Corporation - Longmont CO

International Classification:

G11B 15/18
G11B 5/09

US Classification:

360 69, 360 46

Abstract:

A method and apparatus which can provide a temperature estimate in a hard disk drive or other electronic device is provided. Output from the sensor, which may be indicative of a location spaced from the target temperature location, is sampled and integrated over an interval of time to form an estimate of average input sensor voltage. During the time interval, history of the HDD pre-amplifier operating modes is accumulated. The results are combined to form an estimate of HDA ambient temperature. Sensor offsets associated with each power mode, and weighted to the corresponding mode duty, can be subtracted from the average input sensor voltage.

US Patent:

7310196, Dec 18, 2007

Filed:

May 19, 2005

Appl. No.:

11/132534

Inventors:

Erhard Schreck - San Jose CA, US
Robert Jackson - Union City CA, US
Timothy Glassburn - Milpitas CA, US
Donald E. Adams - Pleasanton CA, US

Assignee:

Maxtor Corporation - Longmont CO

International Classification:

G11B 21/02
G11B 19/02

US Classification:

360 75, 360 69

Abstract:

A disk drive includes a rotatable data storage disk, an interface, a transducer, a write buffer, an actuator, and a controller. The transducer is configured to read and write data on the disk. The interface is configured to receive data with associated write commands and a park signal. The write buffer is configured to temporarily store the data and associated write commands while the data waits to be written on the disk via the transducer. The actuator is configured to move the transducer between a parked position and tracks on a disk where data is read and written. The controller is configured to execute the buffered write commands by positioning the transducer relative to tracks on the disk while writing data from the write buffer to the disk, and is configured to respond to the park signal, which is indicative of an imminent transducer to disk contact condition, by moving the transducer to the park position without completing execution of the buffered write commands.

US Patent:

7738350, Jun 15, 2010

Filed:

Mar 5, 2007

Appl. No.:

11/714379

Inventors:

Donald Adams - Pleasanton CA, US
Yevgeny V. Anoikin - Fremont CA, US
Byong M. Kim - Fremont CA, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

G11B 9/00

US Classification:

369126, 369288

Abstract:

According to embodiments of the present invention, a probe storage medium includes a conductive layer as an electrode and a metal, metalloid, and/or non-metal doped diamond-like carbon (DLC) layer disposed on the conductive layer. A probe array may be positioned close proximity with the layer of doped DLC. An individual probe in the probe array may have an atomic force microscope tip. The probe storage medium may be written to by applying a current, voltage, and/or power to the tip between a thresholds current, voltage, and/or power value and a limiting current, voltage, and/or power value. The current, voltage, and/or power cause the layer of DLC to change conductance. The probe storage medium may be read by applying a current, voltage, and/or power to the tip below a threshold current, voltage, and/or power value and sensing the conductance.

US Patent:

7743249, Jun 22, 2010

Filed:

Feb 14, 2007

Appl. No.:

11/706571

Inventors:

Daniel F. Zucker - Palo Alto CA, US
Martin M. Atalla - Atherton CA, US
Donald S. Adams - Pleasanton CA, US

Assignee:

TriStrata Security, Inc. - Atherton CA

International Classification:

H04L 9/08
H04K 1/00

US Classification:

713163, 713181

Abstract:

An efficient multicast key management is achieved by using seals. A security server generates a seal. In one embodiment, the seal contains a key. In another embodiment, the seal contains information for generating a key. An application server requests the seal from the security server and broadcasts the seal to a plurality of recipients. A recipient wishing to encrypt or decrypt a data stream transmits the received seal to the security server to be opened. If the recipient is authorized, the security server transmits a permit to the authorized recipient. In one embodiment, the recipient generates a key from the permit. In another embodiment, the permit is the key. If the recipient is a sender, the recipient encrypts data using the key and broadcasts the same encrypted data stream to all receivers. If the recipient is a receiver, the recipient decrypts an encrypted data stream using the key. In one embodiment, a seal with a corresponding offset value is sent periodically in a data stream.

US Patent:

7796493, Sep 14, 2010

Filed:

Aug 10, 2007

Appl. No.:

11/891459

Inventors:

Donald Adams - Pleasanton CA, US
Robert Stark - Saratoga CA, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

G11B 9/00

US Classification:

369126, 850 53

Abstract:

In one embodiment, the present invention includes an apparatus having a first cantilever structure to move in a vertical direction, including a first plate formed of a conductive material, an insulation beam adapted on a portion of the first plate, and a second cantilever structure adapted on the insulation beam and including a second plate formed of a conductive material, where an air gap is present between the first and second plates. Other embodiments are described and claimed.

US Patent:

8264941, Sep 11, 2012

Filed:

Dec 26, 2007

Appl. No.:

11/964580

Inventors:

Quan Anh Tran - Fremont CA, US
Byong M. Kim - Fremont CA, US
Robert N. Stark - Saratoga CA, US
Nathan R. Franklin - San Mateo CA, US
Qing Ma - San Jose CA, US
Valluri Rao - Saratoga CA, US
Donald E. Adams - Pleasanton CA, US
Li-Peng Wang - San Jose CA, US
Yevgeny V. Anoikin - Fremont CA, US

Assignee:

Intel Corporation - Santa Clara CA

International Classification:

G11B 9/02

US Classification:

369126, 977947

Abstract:

An arrangement, a method and a system to read information stored in a layer of ferroelectric media. The arrangement includes a layer including a ferroelectric media having one or more ferroelectric domains holding bit charges, a domain corresponding to information; a probe having a tip, wherein the media and the tip are adapted to move relative to one another such that the tip scans the ferroelectric domains of the media while applying a contact force to the domains to generate a direct piezoelectric effect within the domains; and circuitry coupled to the tip and adapted to generate a signal in response to an electrical coupling between the tip and the domains while scanning the tip in contact with the domains, the signal corresponding to a readout signal for ferroelectric bit charges stored in the media.