Marvell International Limited

Pantelis Sophoclis Alexopoulos

Zhimin Yuan

Chun Lian Ong

Siang Huei Leong

Budi Santoso

Weiya Xi

Chiew Leong Wong

Guchang Han

Bo Liu

Jingliang Zhang

Li Wang

Chao Jin

Khai Leong Yong

Jianzhong Shi

Kui Cai

Zhi Yong Ching

Quan Jiang

Kheong Sann Chan

Chao Bi

Qide Zhang

Jing Zhang

Moulay Rachid Elidrissi

Zhimin He

Mengjun Liu

Tiejun Zhou

Chun Teck Lim

Jiang Feng Hu

Leonard Gonzaga

Ke Gan

Wuzhong Lin

Wee Kiat Lim

Sufui Sophia Tan

Yansheng Ma

Yin Quan Yu

Kannan Sundaravadivelu

Ningyu Liu

Jianqiang Mou

Boon Long Ibrahim See

Venkataramanan Venkatakrishnan

Cheng Peng Tan

Chong Wee Lee

Phyu Hla Nu

Wei Hua

Cheng Su Soh

Shengkai Yu

According to various embodiments, a server may be provided. The server may include: a first memory configured to store data of a first kind; a second memory configured to store data of a second kind; a wireless transceiver configured to transmit data stored in the first memory and data stored in the second memory, and configured to receive data; and a memory selection circuit configured to determine whether to store the received data in the first memory or to store the received data in the second memory.

Servers and methods for controlling a server

According to embodiments of the present invention, a sensor array for reading data from a storage medium including a plurality of tracks is provided. The sensor array includes a first sensor, and a second sensor, wherein the first sensor and the second sensor are configured to obtain signals from adjacent tracks of the plurality of tracks of the storage medium, the signals being associated with data stored at the adjacent tracks. According to further embodiments of the present invention, a storage device and a method of reading data from a storage medium including a plurality of tracks are also provided.

Sensor array for reading data from a storage medium, storage device and method of reading data from a storage medium

A hard disk drive device and a method and apparatus for control of the hard disk drive is provided. The hard disk drive includes disk media, a slider head, a head gimbal assembly and a control means. The disk media includes at least two layers for data storage. The slider head flies above the disk media and includes a writer and a reader, and a head gimbal assembly supports the slider head above the disk media. The control means is physically coupled to the head gimbal assembly and electrically coupled to the writer and the reader for reducing write interference from the writer when the writer is writing to the disk media while the reader is reading from the disk media, wherein write interference is reduced in one or more of a time domain and a frequency domain.

Write interference reduction when reading while writing to a hard disk drive media

A system including a write head, a read head, a mixer, and a filter. The write head is configured to write a pattern on a track of a medium of a hard disk drive, wherein the pattern has a first frequency. The read head is configured to read the pattern written on the track of the medium of the hard disk drive. The mixer is configured to mix a first signal generated by reading the pattern with a second signal to obtain a mixed signal. The second signal has a second frequency, and wherein the second frequency is different than the first frequency. The filter is configured to filter the mixed signal to determine a relative head-to-disk speed. The filter has a parameter selected based on a difference between the first frequency and the second frequency.

Method and apparatus for determining relative head-to-disk speed

According to an embodiment of the present invention, a data storage device comprising a motor having a stator is disclosed. The stator may include a substrate having a first surface and a second surface opposite to the first surface; and a n-phase winding arrangement having n phase windings; wherein each phase winding comprises m flat fractional-pitch coils arranged on the first surface of the substrate such that the coils are spaced apart uniformly along a closed loop and connected in series; wherein each coil together with an angular section of the substrate between the coil and an adjacent coil of the same phase winding defines a stator pole-pair; and wherein m is an integer larger than 1.

Data storage device

In various embodiments, a method of writing servo information to a recording medium may be provided. The method include forming a first servo pattern (including a servo burst pattern) on a segment of a first track of a first layer of the recording medium, the first track having a track width. The method may further include forming a second servo pattern (including addressing information) on a segment of a second track of a second layer of the recording medium. The second track is arranged from the first track by half the track width.

Recording medium and a method of writing servo information on the same

Methods and architecture for monitoring hard disk drive operation is provided. The hard disk drive system provided includes a spindle, a head and a disk with a disk medium including a buried servo layer having a first frequency of data on a first track and a second frequency of data on a second track, the second track adjacent to the first track. The method includes the steps of writing a wide track pattern having a predetermined frequency on a track of a hard disk drive medium, generating a readback signal by reading the pattern from the track, processing the readback signal by mixing the readback signal with a reference signal to obtain a mixed signal having a summed signal and a difference signal, and filtering the mixed signal by a filter centered around the difference signal to generate a measurement signal corresponding to a relative speed change of the spindle and a head-to-disk motion. In addition, filtering a readback signal generated by the head when positioned at the middle of the first track and the second track with a first filter centered at the first frequency and a second filter centered at the second frequency is used to generate signals for determining spindle speed variation, spindle speed jitter, and relative head-disk vibration in the downtrack direction, for synchronizing writing in Two Dimensional Magnetic Recording (TDMR) and for measuring continuous flying height information based on Wallace equations.

Methods and apparatus for hard disk drive system operation monitoring and self-adjustment

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Singapore, Singapore

Pantelis Sophoclis Alexopoulos