Marvell International Limited

Seagate Technology Incorporated

Hitachi Global Storage Technologies Netherlands B.v.

Maxtor Corporation

Hitachi Global Storage Technologies

Pantelis Alexopoulos

Lee K Dorius

Gurinder P Singh

Timothy C O'Sullivan

Francis Chee-Shuen Lee

David Chew

Erhard Theodor Schreck

Michael M Lee

Don Brunnett

Zhimin Yuan

Christophe Therene

Chun Lian Ong

Bernhard Hiller

Bruce C Schardt

Maurice L Schlumberger

Chandra Shaker Buddhavaram

Samuel Richard Duell

Chiew Leong Wong

Dimitry Melts

Eric Kvamme

Shinichiro Kuno

Leroy L Leach

Robert L Kimball

Richard Sonnenfeld

James McGrath

Kathleen Fitzgerald, Legal Representative

Robert Milby

Thierry Chatard

Jeff Griffiths

Johanna Hernandez

A data storage device includes a first data storage medium having a first capacity and a first speed, a second data storage medium having a second capacity and a second speed, and a device controller for interfacing between the data storage device and a host system. The second capacity is greater than the first capacity and the second speed is slower than the first speed. The device controller presents the data storage device to the host system as having a device capacity at least equal to the second capacity and a device speed at least equal to the first speed. The first data storage medium may be a solid-state drive while the second data storage medium is a hard disk drive. The device controller may be a solid-state drive controller, or a hard disk drive controller that may accept at least one solid-state drive command, such as a TRIM command.

Two-level storage device with faster front end

A servo system for writing servo information on a recording medium of a hard disk drive and for determining head position based on the servo information with a tracking accuracy, the servo system including a first magnetic head and a servo writer. The servo writer is configured to write the servo information on the recording medium by forming, using the first magnetic head, a first servo pattern comprising a servo burst pattern on a segment of a first track of a first layer of the recording medium; and by forming a second servo pattern comprising addressing information on a segment of a second track of a second layer of the recording medium. The second track is arranged half a width of the first track from the first track to increase the tracking accuracy of the servo system.

Method and apparatus for writing servo information on a recording medium

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

The present invention provides a non-actuatable, self-limiting wear contact pad slider and method for making the same. A protruding element surrounding the transducer is fabricated using a third etch step so that the protruding element has a height that is greater than or equal to the designed fly height of the aerodynamic lift surface minus the disk roughness.

Self-limiting wear contact pad slider and method for making the same

An actuator arm for a disk drive includes a flat sheet of material having a predetermined configuration. This arm lies pivotally mounted to a base of the disk drive; and it supports a coil assembly and cable segments as well as other components such as a pre-amp and a damper. The method of making this actuator arm includes the steps of cutting a flat sheet of material to a predetermined configuration and then securing the various components to it.

Disk drive actuator arm

Growing community of inventors

San Jose, CA, United States of America

Pantelis Alexopoulos