Matches 51 - 100 out of 411 < 1 2 3 4 5 6 7 8 9 >
Match Document Document Title
7085087 Data storage apparatus and method for managing buffer memory  
To avoid degradation of performance of a storage apparatus even when access biased to writing or reading of data is performed in a buffer memory that adopts a dual ring buffer system as a data...
7079345 Demagnetization of magnetic media for data storage device using gradually reduced magnetic field  
Demagnetizing magnetic media for recording data in a data storage device includes placing the magnetic media in a magnetic field at a first strength, and gradually reducing the magnetic field to a...
7079344 Magnetic recording disk drive with data written and read as cross-track magnetizations  
A magnetic recording disk drive has a disk with the magnetizations in the concentric data tracks oriented in the cross-track direction. The concentric data tracks are magnetically separated from...
7076604 Disk drive employing a disk command data structure for tracking a write verify status of a write command  
A disk drive is disclosed comprising a disk having a plurality of tracks each comprising a plurality of data sectors for storing a plurality of data blocks. A microprocessor initializes a write...
7072134 Dual-stage actuator disk drive with secondary actuator failure detection and recovery using relative-position signal  
A dual-stage actuator disk drive uses a secondary-actuator failure-detection and calibration test run by the servo control processor and a relative-position sensor for measuring the position of the...
7068452 Method for recording magnetic information and magnetic recording system  
Stable writing is performed in a super high density hard disk where writing by magnetic field is difficult. A layered thin film structure including at least a magnetic metallic layer/a non-magnetic...
7061705 Signal processing apparatus and method, record medium, and program  
The present invention relates to a signal processing apparatus and method, a recording medium, and a program enabling accurate calculation of a remaining amount of a tape. In a cassette shell 1 ,...
7057838 Magnetic disk device having a write head to write by shifting in a radial direction  
In the present invention, by making the width of the write element larger than the track pitch and securing a write magnetic field strong enough to reverse the magnetization of the magnetic layer,...
7057837 Flux closed single pole perpendicular head for ultra narrow track  
A single pole perpendicular write head is provided comprising an inductive write head pole structure comprising a layered structure alternating a plurality of ferromagnetic layers with a plurality...
7054086 Library device  
A miniaturized library device is provided. The library device employs small-sized magazine having no flag used to detect positions of cells and the magazine is set so that a plurality of cells are...
7050255 System and apparatus for assembly level disk erase  
A disk erase apparatus for erasing information on one or more disks in a disk drive uses a high strength magnetic field to erase the disks while the disks are in the HDD assembly. The design of the...
7050254 Internal disk drive temperature estimation  
Disclosed is a disk drive that provides for internal disk drive temperature estimation. The disk drive includes an actuator, a head attached to the actuator, a disk to store data, a preamplifier...
7050253 Magnetic recording media and magnetic storage apparatus using the same  
In a magnetic storage apparatus having a magnetic recording medium, a drive unit for driving this medium in a prespecified recording direction, a magnetic head assembly including a recorder section...
7050251 Encoding techniques for patterned magnetic media  
The invention is directed to patterned magnetic media for use in magnetic recording and data storage, and various encoding techniques that can be used to magnetically encode data on the patterned...
7042669 Method and apparatus for recording/reproducing magnetization information  
An information storage device having a hard disk has a metal probe that is brought closely to the surface of a multilayer film that includes a magnetic metal layer, a non-magnetic metal layer, and...
7031085 Version tracking of disk write operations  
The present invention is a disc drive storage unit incorporating novel apparatus, data structure and method for uniquely identifying data written during each write command operation of the disc...
7023641 Recording current control method and magnetic disk drive  
In a magnetic disk drive, a writing element and its surrounding area thermally expand due to the heat generated by a write head coil. The transient phenomenon of such thermal expansion may invoke...
7023635 Recording/reproducing apparatus  
A recording/reproducing apparatus capable of switching over among a plurality of heads with high precision, wherein the apparatus is provided with: a recording/reproducing unit for...
7019928 Multi-ported mass storage device  
The present disclosure relates to mass storage devices and, more particularly, to transferring data between mass storage devices.
7009794 Magnetic recording and reproducing device  
In a magnetic recording and reproducing device having a 1 ch head and a 2 ch head, an azimuth recording operation is carried out on an obliquely evaporated magnetic tape. Angles θ 1 and θ 2 ...
7009792 Method and apparatus for data reproducing in a disk drive  
A perpendicular magnetic recording type of disk drive having function of removing a component of a shift in a base line of a reproducing signal is to be disclosed. The disk drive has a read channel...
7006312 Methods for preventing channel control values from being corrupted to thereby improve servo-demodulation robustness  
Methods are provided for improving servo-demodulation robustness. A SAM pattern is searched for in a servo wedge. If the SAM pattern is detected in the first servo wedge, a determination is made...
6999255 Magnetic recording and reproducing system and magnetic recording medium used therein  
A magnetic recording and reproducing system, including recording a signal on a magnetic recording medium by an inductive head and reproducing the signal by a magneto resistance head. The gap length...
6987631 Data read/write method and apparatus  
An apparatus and method of reading and writing data from and to a data storage device is provided. One method of practicing the present invention comprises placing, or leaving an unused track, row...
6985321 Head suspension assembly mounting nonvolatile memory and magnetic disk device  
A head suspension assembly having a magnetic head, an arm which is supported so as to rotate, a suspension having one end which is fixed to an end of the arm and an other end which mounts the...
6985318 Method and apparatus for precessional switching of the magnetization of storage medium using a transverse write field  
A magnetic recording process generally including the steps of determining an initial magnetization direction of a magnetic recording medium, and selectively applying a magnetic field to the...
6982845 Magnetic recording apparatus and magnetic recording method  
A magnetic recording apparatus comprises a magnetic field impression unit, a current supplying unit and a controlling unit t. The magnetic field impression unit impresses a magnetic field to a...
6979524 Contact printing of longitudinal magnetic media with perpendicularly applied magnetic field  
A method of forming a magnetic transition pattern in a longitudinal magnetic recording medium, comprising steps of: (a) providing a magnetic recording medium including a layer of a magnetic...
6975807 Video tape recorder  
A video tape recorder includes a rotary cylinder of double-azimuth four-head structure having a pair of main heads and a pair of subheads. When it is detected base on an envelop signal that...
6975474 Method and apparatus for read error recovery in a disk drive with a GMR read head  
A disk drive is disclosed which has a facility to perform a pinning reset operation on a GMR read element included in a head if a read retry operation fails to achieve recovery from a read error....
6975472 Head with heating element and control regime therefor  
A head with a heating element and control regime therefor is disclosed. In embodiments described, the control regime or controller energizes the heater or heating element to provide intermittent...
6967810 System and method for writing HDD depending on direction of head skew  
Data is written to a hard disk drive using shingled writing principles, i.e., each data track is partially overwritten when an immediately contiguous data track is written. Two or more contiguous...
6963459 Method and apparatus for optimizing auto gain control of read channel in a disk drive  
There is disclosed a disk drive which can appropriately execute a gain control of an AGC amplifier included in a read channel for each zone on a disk. A CPU refers to table information stored in a...
6961198 Method and apparatus for controlling data read/write between a hard disk and a hard disk controller  
An apparatus for controlling data read/write between a hard disk and a hard disk controller is disclosed. The hard disk includes a disk for storing data, multiple read/write heads for reading or...
6961196 Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier  
A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern...
6947235 Patterned multilevel perpendicular magnetic recording media  
A patterned perpendicular magnetic recording medium has magnetic islands that contain stacks of individual magnetic cells to provide multilevel recording. Each cell in an island is formed of a...
6943969 Method of detecting protrusion on recording medium and detecting apparatus therefor  
An acoustic emission sensor is mounted on a flying slider opposed to a rotating recording medium, for example. The acoustic emission sensor outputs a detection signal in response to the sound of...
6940672 Azimuthal transition layout for two-sided data storage tape  
In general, the invention provides two-sided magnetic data storage tape comprising azimuthal magnetic transition layouts that can substantially reduce demagnetization of recorded magnetic...
6927931 Magnetic disk drive and method of controlling the same  
A magnetic head is disposed opposite to a magnetic disk having a first recording area capable of facilitating writing information to the magnetic disk when the surrounding temperature is low, and a...
6909566 Magnetic recording/reproducing device  
The invention relates to a magnetic recording/reproducing device in which a reproduce head is positioned where the crosstalk between adjacent tracks in a magnetic disk is minimized to maintain an...
6907322 Method and apparatus for characterization of thermal response of GMR sensors in magnetic heads for disk drives  
A method and apparatus for characterization of a thermal response of giant magnetoresistive (GMR) sensors in magnetic read/write heads is provided. The method and apparatus make use of a probe to...
6906879 Magnetic recording system with patterned multilevel perpendicular magnetic recording  
A magnetic recording system, such as a magnetic recording disk drive, uses a patterned perpendicular magnetic recording medium where each magnetic block or island contains a stack of individual...
6904539 Method of determining data transfer speed in data transfer apparatus  
A method of determining a transfer speed of an encoded data signal including a clock signal and a data signal is provided. First, the encoded data signal is decoded to generate a decoded clock...
6903891 Photoconductive optical write driver for magnetic recording  
A write driver for use with a magnetic recording head includes a photoconductive switch that is positioned adjacent a magnetic recording head for switching current waveforms. Both light and a DC...
6898038 Method and apparatus for disc drive data security using fields in servo wedges  
The present invention includes a method and apparatus to write and read copy protected data on a disc drive storage system by encoding and decoding data to be copy protected using servo wedge data...
6898037 Optical equipment assemblies and techniques  
A method and apparatus for detecting a topographic feature on a media is described. More particularly, a light scatter detector is coupled to an atomic force microscope. The detector is used detect...
6894858 Read equalizer optimization based on the PTR effects to write equalization  
A system and method for decoding magnetic media. Parallel decoders, each with a different equalization magnitude, are used to decode a read signal. A Viterbi metric is used to determine the...
6894857 Magnetic recording apparatus and method of designing the same  
A method of designing a thermally-assisted magnetic recording apparatus having a magnetic recording medium, a heater and a magnetic head includes, determining a stable retention time t st for...
6894856 Magnetic recording medium, magnetic recording apparatus using the same, and method and apparatus for manufacturing the magnetic recording medium  
A magnetic recording apparatus provides improved resolution and S/N without adversely affecting thermal stability. An angle formed by the direction of easy magnetization of a recording layer and...
6894855 Magnetic disk drive including read channel for processing differentiated read signal  
A disk drive of perpendicular magnetic recording method including a read head comprising a GMR element and a drive using a double-layered disk medium, is disclosed. In the magnetic field response...
Matches 51 - 100 out of 411 < 1 2 3 4 5 6 7 8 9 >