Maxtor Corporation

Seagate Technology Incorporated

Western Digital Technologies, Inc.

Amazon Technologies, Inc.

Don Brunnett

Yu Sun

Lin Guo

Erhard Theodor Schreck

Bruce A Liikanen

John Charles Purkett

Lloyd E Levy

Thomas O Melrose

David Marcus Tung

Ramez Nachman

Duc H Banh

John W Vanlaanen

Benjamin Thomas Gaide

James W Hargarten

Bryan Holmdahl

Jingbo Yu

Faheem Ahmad Dani

Stephen H Perlmutter

Mike Lee

Prokash Sinha

Adrián Cerdá

Suet Teo

Richard M Ehrlich

Michael M Lee

Robert P Ryan

Yuan Chen

Charles R Watt

Andrew W Vogan

Thao Anh Nguyen

Chun Sei Tsai

Duc T Phan

Gang Herbert Lin

Xiaoping Hu

Brian P Rigney

Jiangang Liang

Alain Chahwan

John P Mead

Wentao Yan

Richard Oswald

Stanley H Shepherd

John L Seabury

Bernhard Hiller

Bruce C Schardt

Stan Shepherd

Maurice L Schlumberger

Sang Huynh

Kent William Gibbons

Mark Rice

Chandra Shaker Buddhavaram

Mark Heimbaugh

Yilin Cai

David Chew

Chris Hawks

Pantelis Alexopoulos

Hongchao Tim Zhao

Samuel Richard Duell

Douglas J Krajnovich

John Vicars

Kezhao Zhang

S Craig Smith

Steve McCarthy

Eric D Mudama

Anthony L Pei

Dave McMurtrey

Leroy L Leach

Eric Kvamme

Todd Franks

Tony Hurtado

Kaz Saito

Nick Warner

Robert L Kimball

Richard Sonnenfeld

Kurt Rusnak

Georgie Tan

Uwe Schwiegelshohn

XiaoPing Hu

Thierry Chatard

Jeff Griffiths

Johanna Hernandez

James McGrath

Kathleen Fitzgerald, Legal Representative

Robert Milby

Jahangir John Kasraee

Bill Flynn

Systems, methods, and computer-readable media are disclosed for dynamic adjustments to battery parameters using battery metrics. The device may be configured to determine a first value indicative of a battery voltage output during a first time interval, determine a second value indicative of a temperature during the first time interval, and determine a first acceleration factor for the battery during the first time interval based at least in part on the first value and the second value. The device may determine an adjusted number of charge cycles completed during the first time interval using the first acceleration factor, determine a total adjusted number of charge cycles of the battery, determine that the total adjusted number of charge cycles is equal to or greater than a first threshold, and cause the first maximum output voltage value to be reduced.

Dynamic adjustments to battery parameters using battery metrics

Systems, methods, and computer-readable media are disclosed for battery-specific adjustments to maximum battery voltage. In one embodiment, an example device may include a battery, at least one memory that stores computer-executable instructions, and at least one processor. The device may be configured to determine a first value indicative of a first length of time the battery was at a first voltage and a first temperature, determine a second value indicative of a second length of time the battery was at a second voltage and a second temperature, determine that a sum of the first value and the second value satisfies a first threshold, and cause a maximum output voltage value to be reduced from a first maximum output voltage value to a second maximum output voltage value.

Battery-specific adjustments to maximum battery voltage

A flash memory device apparatus and method is provided such that data or programming information is uploaded or downloaded between the flash memory device and a host, in response to a single-press of a button associated with the flash memory device. The system can facilitate a number of operations including saving an active window application or associated data, transferring media files to or from media players, providing device-specific and/or data-specific transfer of applications or data and/or providing protection of transferred data or applications.

Memory method and apparatus with button release

A disk drive is disclosed comprising a disk, a head for writing data to the disk, and control circuitry coupled to the head. The control circuitry is operable to determine a first set of fly height values and determine a threshold based on the first set of fly height values. The control circuitry determines a second set of fly height values, adjusts the threshold based on the second set of fly height values, and detects a head characteristic based on the adjusted threshold. The head characteristic is detected by detecting a head touchdown event and/or detecting contamination related to the head based on the adjusted threshold.

Adaptive threshold for detecting touchdown or contamination

Flash memory method and apparatus with single-press button response

Adaptive shock detection systems are provided according to various embodiments of the present invention. In one embodiment, an adaptive shock detection system comprises a shock sensing circuit, and a controller configured to receive shock detection signals from the shock sensing circuit and to dynamically adjust a sensitivity of the shock sensing circuit based the received shock detection signals.

Adaptive shock detection

A RAID system is provided which can be implemented as a hardware RAID system while avoiding certain shortcomings of previous RAID systems. The RAID system makes it possible to avoid or reduce the number of buffers or processors and can take advantage of drive logic to achieve RAID functions or enhancements. RAID functionality can be provided in a manner to accommodate one or more ATA drive interfaces. To avoid drive replacement problems, host requests for drive serial numbers are responded to with a mirror serial number. In one embodiment, the read address is used to select which drive will perform a read operation.

RAID system and method compatible with improved drive select

A disk drive is disclosed comprising a disk comprising a plurality of tracks, and a head actuated over the disk. A plurality of refresh zones are defined, wherein each refresh zone corresponds to a plurality of the tracks. Data is written to a first refresh zone, and a first zone counter is updated for a second refresh zone at a first rate. Data is written to a third refresh zone, and the first zone counter is updated for the second refresh zone at a second rate different than the first rate.

Disk drive biasing refresh zone counters based on write commands

Methods and structures for appending metadata with recorded data in a dynamic mapped storage device. In a dynamically mapped storage device in which all user supplied logical blocks are dynamically mapped by the storage device controller to physical disk blocks, features and aspects hereof allow presently unused physical space to be used for storing additional metadata associated with recorded data. As the current capacity ratio of the storage device increases, appending of metadata may cease and previously recorded data including metadata may be re-recorded (migrated) to eliminate the appended metadata. The appended metadata may be used for enhanced diagnosis and analysis of characteristics of the operating storage device and may be used to restore the content of the storage device to an earlier state. The metadata may include, for example, track following position of the read/write head, temperature, head flying height, and time of day.

Methods and structure for dynamic appended metadata in a dynamically mapped mass storage device

Methods and structure for switching heads on a multiple recording surface disk drive that uses bi-directional radial writing toward a zipper zone at a middle diameter. When switching from a first head to a second head, features and aspects hereof assure that the second head will not be positioned in the zipper zone of the corresponding second surface and hence will not lose track following servo synchronization and control. In one aspect, added buffer or guard tracks having valid servo information but no data are added on either side of the zipper zone to assure that under the worst-case misalignment of surfaces the second head will not be positioned in its corresponding zipper zone when switching from the first head.

Methods and structure for improved disk head switching to avoid zipper zones

In accordance with various embodiments, a rotatable member is mounted to a spindle hub so that initial servo data previously provided to the rotatable member are eccentrically offset with respect to a rotational center of the spindle hub. Compensation vales are determined to characterize said offset, after which final servo data are provided to the rotatable member in relation to the initial servo data and the determined compensation values. The final servo data are nominally concentric with the rotational center of the spindle hub.

Servo writing with offset compensation for prewritten reference

A magnetic storage system includes a disk, a head, an actuator, and a servo controller. The servo controller monitors a value, such as a position error signal (PES) sample value, a predicted PES sample value, and the like, that is based on servo information provided by the head. The servo controller provides a signal to inhibit writing by the head based on a comparison of the monitored value with a threshold, such as a write fault window (WFW), a PES plus Velocity (PPV) threshold, and the like. The servo controller sets the threshold to a first value based on at least one of an on-track track misregistration (TMR) value and a seek settle TMR value. When the servo controller determines that the head is subject to a vibration condition, the servo controller sets the threshold to a second value that is different from the first value.

Magnetic storage systems and methods with tighter write fault window to improve reliability

A control source and drivers for a thermal actuator fly height controlled heads in a disk drive system includes provisions for driving a heater element to dissipate various levels of power, and thus actuate the head by a desired amount, depending on whether the head is in a write mode or a read mode. Further, overshoot and undershoot are achieved as desired by providing initial values and equilibrium values and through the use of a control capacitor to provide a time constant to the drive signal to the heater element.

Method of operating read and write transducers by controlling thermal actuation

Performing embedded runout correction for a track on a rotational data storage disk includes measuring written-in runout for the track, selecting a number of revolutions in response to the measured written-in runout of the track, calculating embedded correction values for the track for the selected number of revolutions of the rotational data storage disk, and storing the embedded correction values.

Embedded runout correction based on written-in runout measurement

Real-time correction of repeatable runout for multiple harmonic frequencies is provided by using convolution of a position error signal, or similar real-time signal, with an impulse response of a specific transfer function, such as the inverse of the disturbance transfer function. Multiple harmonic frequencies can be followed substantially simultaneously to achieve small position error and good tracking misregistration (TMR) performance. The impulse response can be obtained, calculated and stored off-line. The impulse response can be configured to substantially eliminate correction of one or more frequency or frequency ranges. Convolution can be done relatively quickly with proper arrangement of memory.

Convolution based multiple harmonic frequency repeatable runout compensation method and apparatus

Growing community of inventors

Pleasanton, CA, United States of America

Don Brunnett