Seagate Technology Incorporated

Rolls-royce Corporation

Xiong Liu

Lihong Zhang

Wenxiang Xie

Quan Li

Li Hong Zhang

ChoonKiat Lim

Jian Qiang

Qiang Bi

Choon Kiat Lim

MingZhong Ding

Joseph Cheng-Tsu Liu

YiChao Ma

KianKeong Ooi

Kevin Arthur Gomez

Feng Shen

Jin Quan Shen

Xiang Lu

Jiangnan Lin

UttHeng Kan

Choon Wei Ng

Brian Thomas Edgar

Samuel Gan

Swee Chuan Gan

Kai Yang

Kian Keong Ooi

Edmun ChianSong Seng

Hao Sun

Mark A Gaertner

Andrew Michael Kowles

Ralph William Cross

BengWee Quak

WeiLoon Ng

ShuangQuan Min

ChengYi Guo

Michael Joo Chiang Toh

LeeLing Tan

Yongjie Tang

Wei Zhang

Myint Ngwe

Jason Charles Jury

Chris Michael Woldemar

Shashwat Shukla

WingKong Chiang

AikChuan Lim

Aik Chuan Lim

Jimmy Pang

WeiSung Lee

Michael Allen Seigler

Ara Patapoutian

Bruce Douglas Buch

Tim Rausch

Hans L Leuthold

Timothy Richard Feldman

Mourad Benakli

Anthony Joseph Aiello

Amit Kumar Gupta

Kirill A Rivkin

Werner Scholz

Nigel Frank Misso

John D Stricklin

Todd Michael Lammers

Kenneth A Haapala

Mo Xu

Erik Jon Hutchinson

Weibin Chen

Abhay Tejmal Kataria

Raul Horacio Andruet

Neil Zuckerman

Manuel A Offenberg

Teck Khoon Lim

YangQuan Chen

William Erik Anderson

Michael Adam Zagrodnik

Joseph C Liu

Jae Ik Song

Utt Heng Kan

Stephen John Mountain

Ying Su

Yimin Niu

Beng Theam Ko

Gregory Paul Moller

Xinwei Li

Paul Julio Sonda

CheeWai Lum

Patrick TaiHeng Wong

ChorShan Cheng

Wai Onn Chee

Kwee Teck Say

Shri Hari Narayan

Paul Michael Wiggins

Tak Koon Ooi

Kok Tong Soh

KianSoon Yeo

Mui Chong Chai

June Christian Ang

Erming Luo

Wen Xiang Xie

Mathew Daniel

Jian Chen

JiaHong Shu

A hard disk drive includes at least one magnetic disk and a motor assembly. The motor assembly is configured to rotatably support the magnetic disk(s) and circumferentially rotate the magnetic disk(s) about an axis of rotation during operations of the hard disk drive. The motor assembly includes at least one rotational balancing spring pin. Each rotational balancing spring pin is configured to reduce a rotating unbalance of the motor assembly.

Hard disk drive having a motor assembly with a rotational balancing spring pin

A method involves determining a threshold error rate that will result on data stored on a magnetic disk surface of a disk drive being unrecoverable. The method also involves determining a seek velocity that will overwrite sufficient portions of the data such the data will exhibit at least the threshold error rate. The disk drive performs at least one traversal of the magnetic disk surface with a head of the disk drive that emits an erase field during the at least one traversal at the seek velocity. The at least one traversal sanitizes the data.

Fast partial erasure for drive sanitization

An alternate reality, such as virtual reality or augmented reality, environment can experience optimized performance with a data system arranged with an interaction device connected to a virtual reality assembly. Base content and user content can respectively be downloaded and stored to a local data storage of the virtual reality assembly. The content may be utilized to proactively generate comprehensive content that consists of merged aspects of the base content and the user content. The comprehensive content can then be executed to create an immersive digital reality conveyed to a user via the interaction device.

Prospective generation and storage of content for an alternate reality environment

A data storage system includes a plurality of data storage drives, and a system controller coupled to each data storage drive of the plurality of data storage drives. The system controller is configured to store internal drive management data for each data storage drive of the plurality of data storage drives.

External storage of internal drive management data

A recording head has a magnetic write transducer having a first crosstrack width operable to write a single track of data at a time to a magnetic disk. The recording head also has a magnetic erase transducer separate from the magnetic write transducer. The magnetic erase transducer has a second crosstrack width operable to simultaneously erase multiple tracks of data from the magnetic disk.

Data storage drive with dedicated erase transducer

The technology disclosed herein pertains to a method for determining expected command completion time (CCT), the method including receiving a plurality of position error signals (PESs) for an HDD over a predetermined time period, determining sigma of the plurality of PESs, retrieving upper off-track limits (UOL) for one or more data sectors of the HDD, calculating average number of retrieved sectors (A) between two consecutive occurrences of the |PES|>UOL for the HDD, and determining required number of revolutions (CCT) to collect data based on the average number of retrieved data sectors (A) and a total number of requested data sectors (N).

Storage device system performance management

A data storage device includes a disc, an actuator arm assembly, a servo clock, and a feedback and control system. The disc includes a top and bottom surfaces and a servo wedge. The servo wedge includes a top surface boundary and a bottom surface boundary. The actuator arm assembly supports a head pair configured for interaction with the top and bottom surfaces. The servo clock is configured to determine a top time at which the head pair encounters the top surface boundary and a bottom time at which the head pair encounters the bottom surface boundary during a disc read/write interaction. The feedback and control system is configured to determine an operation time difference; compare the operation time difference to a certification time difference correlating to a target vertical position of the actuator arm assembly relative to the disc; and move the actuator arm assembly to the target vertical position.

Z-height control for disc drive using servo wedge timing

A slider for use in a disk drive includes a substrate surface to be spaced from recording media surface within the disk drive, at least one read/write transducer having a transducer end surface adjacent and proximate to the substrate surface, a protrusion controller associated with the at least one read/write transducer. The transducer end surface includes a preformed protrusion extending generally in a direction perpendicular to the substrate surface, the protrusion is substantially centered along the transducer end surface, and the protrusion formed to passively provide a consistently-positioned close-point to the recording media surface when the protrusion controller is active.

Skew-independent close-point transducers

A device includes a servo controller that includes or that is coupled to memory. The memory stores multiple distinct disturbance control schemes. The servo controller is configured to select and implement one of the disturbance control schemes in response to receiving a command from a host. The servo controller can be implemented on a system on a chip.

Adaptable servo controllers

A data storage device includes a stack of discs mounted on a spindle and a pivot block rotatably mounted around a shaft. The data storage device also includes an arm having first and second ends, with the first end supporting a head and the second end movably attached to the pivot block. The data storage device further includes an ultrasonic piezoelectric actuator that moves the arm along the pivot block to enable the head to interact with data storage surfaces of the discs.

Data storage drive with a vertically translatable actuator arm

The technology disclosed herein pertains to a system and method for storing data on a storage media using both down-track super parity and cross-track super parity. Specifically, a method disclosed herein provides for generating down-track super parity values for data on the plurality of tracks and storing the down-track super parity values on a down-track super parity row of the storage block and generating cross-track super parity values for data on the plurality of rows and storing the cross-track super parity values on a cross-track upper parity track, wherein the cross-track super parity value for any given row is generated by inputting the data on the given row into an exclusive-OR (XOR) gate.

Matrix super parity for data storage

The technology disclosed herein pertains to a system and method for managing off-track retry. An implementation of a method of determining offset direction for read off-track retry includes storing analog to digital converter (ADC) values of data read from a data sector by a data reader in a read channel buffer, calculating an indicator value of the distribution of the ADC values, determining an amount of offset for the data reader based on the indicator value, and moving the data reader by the amount of offset before performing a read retry operation.

System and method for managing off-track read retry

A hard disk drive includes a base deck that is coupled to a cover, a motor assembly that is coupled to the base deck, and magnetic recording media that is coupled to the motor assembly. The motor assembly includes a magnetic bearing with a horizontal magnetic bearing component and a vertical magnetic bearing component.

Magnetic bearings for data storage devices

A data storage system includes a logical space having logical block addresses (LBAs) divided into non-overlapping LBA ranges, and a physical space having pairs of physical bands. The system also includes a map in which first successive alternate LBAs of each different one of the non-overlapping LBA ranges are mapped to successive adjacent physical blocks of a first physical band of each different pair of the pairs of physical bands, and second successive alternate LBAs of each different one of the non-overlapping LBA ranges are mapped to successive adjacent physical blocks of a second physical band of each different pair of the pairs of physical bands. A controller employs the map to concurrently read data from a first physical block of the first physical band of one pair of physical bands and from a first physical block of the second physical band of the same pair of physical bands.

Multiplying data storage device read throughput

The technology disclosed herein provides a method including determining an acceptable parameter rate for a dual reader storage device having dual readers, identifying one of the dual readers as the preferable reader, comparing an actual parameter rate of the storage device to the acceptable parameter rate of the storage device, and in response to determining that the actual parameter rate is below the acceptable parameter rate, operating the storage device using only the preferable reader. In one implementation, the parameter rate is bit-error rate (BER) of the dual readers.

Dual reader controller

Growing community of inventors

Singapore, Singapore

Xiong Liu