Western Digital Technologies, Inc.

Applied Materials, Inc.

Western Digital Corporation

Jie Yu

Guoxiao Guo

Jun Xu

Abhishek Dhanda

Wei Xi

Wei Guo

Michael A Chang

Jianguo Zhou

Sanghoon Chu

Grant C Mackey

Junpeng Niu

Teddy T C Chen

Kartik Ramaswamy

Eric S Bjornson

Young-Hoon Kim

Teik Ee Yeo

John W Vanlaanen

Jonathan V Nguyen

Russ A Quisenberry

Shuyu Cao

Davide Giovenzana

Robin O'Neill

Jinsheng Bill Jang

Ling Chih Wei

Yang Yang

John C Forster

Raffi Codilian

William Bernard Boyle

Shahid Rauf

Yue Guo

Jack M Chue

Sidharth Bhatia

Donald Joseph Brunnett

Min Chen

Kuang-Yang Tu

Richard Koonwai Wong

Tao Zhang

Shaun Astarabadi

Michael Troy Nicholls

David D Nguyen

Yiming Chen

Prakash Balasubramaniam

Masao Miyamura

John Yin Kwong Li

Danny J Kastler

Wai Ee Wong

Jian Ping Chen

Hui Li

Qingwei Jia

Qing Wei Jia

Philip S Gordon

Krishna Kumar Kuttannair

Jie Wan

David B Joan

Eugene Chun-Tsing Wu

Teddy T Chen

Xiaotian Xu

Honge Wang

Rong Gang Zheng

Eugene C Wu

Jinchuan Zheng

Tuong M Vu

Hasnorhafiza Husni

Hong Wan Tham

Edgar De-Jia Sheh

Embodiments disclosed herein include a dynamic load simulator. In an embodiment, the dynamic load simulator comprises an impedance load, a reverse match network, and a smart RF controller. In an embodiment, the smart RF controller comprises a dynamic load generator, and a reverse match controller.

Smart dynamic load simulator for RF power delivery control system

Methods and apparatus using a matching network for processing a substrate are provided herein. For example, a matching network configured for use with a plasma processing chamber comprises a local controller connectable to a system controller of the plasma processing chamber, a first motorized capacitor connected to the local controller, a second motorized capacitor connected to the first motorized capacitor, a first sensor at an input of the matching network and a second sensor at an output of the matching network for obtaining in-line RF voltage, current, phase, harmonics, and impedance data, respectively, and an Ethernet for Control Automation Technology (EtherCAT) communication interface connecting the local controller to the first motorized capacitor, the second motorized capacitor, the first sensor, and the second sensor.

RF impedance matching networks for substrate processing platform

Systems and methods are disclosed for accessing data on a storage system. An apparatus, such as a data storage device or a computing device, may include a memory configured to store data. The apparatus is configured to determine an importance level for a file to be stored in the storage system. The data storage system includes one or more private storage clouds and one or more public storage clouds. The apparatus is also configured to generate a set of recovery data chunks based on the file and the importance level. The apparatus is further configured to store the set of recovery data chunks in the set of public storage clouds. The apparatus is further configured to store at least a portion of the file in the private storage cloud.

Hybrid data storage system with private storage cloud and public storage cloud

Systems and methods are disclosed for storing multimedia assets (or other data objects) in a storage array. Portions of the multimedia asset may be stored on different chunks of the storage drives in the storage array based on an access frequency level for a portion, an importance level for the portion, a reliability score for a chunk, and a performance score for the chunk.

Data storage system with multimedia assets

A data storage system may include one or more storage arrays. Each storage array may include a first set of solid-state drives and a first set of striped hard disk drives. Each solid-state drive of the first set of solid-state drives has a first data throughput and the set of stripe hard disk drives has a second data throughput. The second data throughput of the first set of striped hard disk drives is within a threshold throughput of the first data throughput. The data storage system also includes a processing device configured to receive an access request to write first data to the storage array and determine a read access frequency of the first data. The processing device may also be configured to determine a write access frequency of the first data and write the first data to the first set of solid-state drives or the first set of striped hard disk drives, based on the read access frequency and the write access frequency.

Hybrid data storage array

A data storage system may include a first storage pool and a second storage pool, with the second storage pool comprising larger, slower storage drives. The data storage system may associate, with a first data, a first parameter corresponding to an access frequency for short term reads, a second parameter corresponding to access frequency for long term reads, a third parameter corresponding to an access frequency for short term writes, and a fourth parameter corresponding to an access frequency for long term writes. The data storage system may then determine whether to store the first data on the first storage pool or the second storage pool based on at least one of the first parameter, the second parameter, the third parameter, and the fourth parameter.

Unified tier and cache structure

An apparatus includes: an adaptive declustered RAID array configured of data storage devices (DSDs), the DSDs comprise data chunks allocated as data, a local parity, or a global parity; and a controller configured to generate a reliability indicator reflective of a reliability status of at least a portion of the adaptive declustered RAID array for reallocating the data chunks by dynamically increasing or decreasing the data chunks allocated as the local parity, the global parity, or a combination thereof.

Electronic system with declustered data protection by parity based on reliability and method of operation thereof

Systems and methods are disclosed for accessing data on a storage system. An apparatus, such as a data storage device or a computing device, may include a memory configured to store data. The apparatus is configured to receive a request for a file stored in a storage system. The storage system includes a private storage cloud and a set of public storage clouds. The apparatus is also configured to determine whether the file is retrievable from the set of public storage clouds. If the file is retrievable from the set of public storage clouds the apparatus may determine whether access to the set of public storage clouds is faster than access to the private storage cloud and may retrieve the file from one or more of the private storage cloud and the set of public storage clouds.

A disk drive is disclosed comprising a disk comprising a plurality of servo sectors defining a plurality of servo tracks. The servo tracks form a plurality of servo zones, where a servo data rate of servo sectors in a first servo zone is different than a servo data rate of servo sectors in a second servo zone. A servo control system servos a head over the disk. An estimated servo state of a servo control system is generated, and when the head crosses from a first servo zone to a second servo zone, the estimated servo state is adjusted to compensate for a transient in a circumferential distance between a servo sector in the first servo zone and a servo sector in the second servo zone.

Disk drive adjusting estimated servo state to compensate for transient when crossing a servo zone boundary

A data storage device is disclosed comprising a spindle motor configured to rotate a disk, wherein the spindle motor comprises a plurality of windings, and a head actuated over the disk. The windings of the spindle motor are commutated based on a commutation sequence while applying a periodic driving voltage to each winding. During a seek operation to seek the head a seek length, an amplitude of the periodic driving voltage is adjusted according to a driving profile corresponding to the seek length, wherein the driving profile compensates for a power disturbance during the seek operation.

Data storage device employing spindle motor driving profile during seek to improve power performance

A disk drive is disclosed comprising a timing loop configured to generate a clock synchronized to a rotation of a disk and a servo loop configured to control an actuator to actuate a head over the disk. A timing signal generated by the timing loop is filtered with a pre-compensation filter (PCF) comprising an inverse transfer function from a delta in a rotation velocity of the disk (&#x394;&#x3c9;) due to a vibration affecting the disk drive to the timing signal, and the actuator is controlled to actuate the head over the disk based on an output of the PCF.

Disk drive using timing loop control signal for vibration compensation in servo loop

A data storage device is disclosed comprising a disk comprising data, and a head actuated over the disk. A timing signal is generated by reading the data from the disk, and a frequency generator is adjusted based on the timing signal to generate a disk locked clock substantially synchronized to a rotation speed of the disk. A free fall condition is detected based on the timing signal, and when the free fall condition is detected the head is parked.

Data storage device detecting free fall condition from disk speed variations

A data storage device is disclosed comprising a disk surface comprising a plurality of tracks, wherein each track comprises a plurality of data sectors and a plurality of servo sectors. The data storage device further comprises a head actuated over the disk surface, the head comprising at least one read element and at least one write element. Control circuitry is configured to use the head to write to a first data sector on the disk surface while simultaneously reading from a first servo sector on the disk surface.

Data storage device reading servo sector while writing data sector

A disk drive is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors recorded around the circumference of the disk at a servo sampling frequency, and a servo control system operable to actuate a head over the disk by generating a control signal applied to an actuator. A first sinusoid is injected into the servo control system and a first DC component (dc1) is measured in the control signal. A second sinusoid is injected into the servo control system and a second DC component (dc2) is measured in the control signal, wherein the second sinusoid comprises a phase offset from the first sinusoid. A resonance mode of the servo control system is measured based on dc1 and dc2.

Disk drive measuring a resonance mode by injecting sinusoids into a servo control system

A disk drive is disclosed comprising a disk having a plurality of data tracks defined by servo sectors, where each data track comprises a plurality of data sectors, and each servo sector comprises a servo preamble and servo data. The disk drive further comprises a head comprising a read element and a write element, and a servo read channel comprising an analog front end and a timing recovery circuit. During an access operation, data preceding the servo preamble of a first servo sector in the first data track is read in order to initialize the analog front end of the servo read channel. At least part of the servo preamble is read to initialize the timing recovery circuit of the servo read channel, and at least part of the servo data of the servo sector is read using the timing recovery circuit.

Disk drive initializing servo read channel by reading data preceding servo preamble during access operation

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Irvine, CA, United States of America

Jie Yu