Did You Know...
...that Robert Adler has the dubious distinction of being the Father of the Couch Potato? Back in 1955 Adler was employed by what was then Zenith Radio Corp., where he was charged to invent something that would allow viewers to turn down the TV volume without leaving their chairs. After a series of flops (such as a wired contraption that people tripped over), Adler hit on the idea of using sound waves. Thus the Remote Control was born...
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| Application No. | Application Title | Issue Date |
| 20120069465 | SPIN TORQUE OSCILLATOR AND MAGNETIC RECORDING HEAD AND MAGNETIC RECORDING DEVICE MOUNTED WITH THE SPIN TORQUE OSCILLATOR The present invention provides a spin torque oscillator that can realize stable oscillation and has high reliability. A laminated structure including a first magnetic layer 1 having a bcc crystal structure and having in-plane magnetic anisotropy and a second magn... | 03/22/2012 |
| 20120019957 | METHOD OF MEASURING NON-COHERENT RUNOUT FOR A DISK DRIVE In a disk drive, a modified adaptive runout compensation algorithm is employed to measure non-coherent repeatable runout (RRO) of a track. The adaptive runout compensation algorithm is used to control the transducer head to follow the average RRO of adjacent tracks duri... | 01/26/2012 |
| 20110310506 | MAGNETIC DISK DEVICE AND HEAD POSITION CONTROL METHOD According to one embodiment, a magnetic disk device includes a magnetic disk, a magnetic head, a position error signal output module, a vibration pattern detector, an adder, and a head positioning controller. The magnetic head moves over the magnetic disk. The position ... | 12/22/2011 |
| 20110292541 | DISK-ENCLOSURE COVER FOR LOW-PROFILE, HARD-DISK DRIVE A disk-enclosure cover for a low-profile, hard-disk drive (HDD). The disk-enclosure cover includes a substantially flat, plate-like portion that includes a periphery, and a peripheral flange that is disposed at the periphery. The peripheral flange includes a recessed po... | 12/01/2011 |
| 20110188154 | MAGNETIC DISK DEVICE AND CONTROL METHOD THEREOF, AND INFORMATION PROCESSOR According to one embodiment, a magnetic disk device is configured to read data from and write data to a magnetic disk using a magnetic head and provided with a control module that controls initial operation of the magnetic disk device according to initial firmware. The ... | 08/04/2011 |
| 20110141617 | METHOD AND APPARATUS FOR MEASURING DISK RUNOUT IN A DISK DRIVE According to one embodiment, a disk drive includes an actuator, a servo controller, a calculation module and an adjustment module. The actuator is configured to move the head over a disk, in the radial direction of the disk. The servo controller is configured to make th... | 06/16/2011 |
| 20100302675 | STORAGE MEDIUM AND METHOD AND PROGRAM FOR DETECTING TRACK POSITION OF STORAGE MEDIUM According to one embodiment, a storage medium that stores position information indicating positions of a plurality of tracks in a radial direction in the tracks, wherein the position information includes: a first pattern in which a feed angle indicating a phase differen... | 12/02/2010 |
| 20100271731 | UNEQUAL ZONING FOR TRACK FOLLOWING ON A HARD DISK DRIVE Unequal zoning for track following on a hard disk drive comprising at least one magnetic disk, a read/write head connected to at least one actuator arm and capable of reading and writing data on said at least one magnetic disk, a controller capable of moving said at lea... | 10/28/2010 |
| 20100232056 | METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING/REPRODUCING DEVICE Provided is a process for manufacturing a magnetic recording medium having a magnetically partitioned magnetic recording patterns, which comprises the following steps, conducted in the order: (1) step of forming a magnetic layer on a non-magnetic substrate, (2) step of ... | 09/16/2010 |
| 20100220409 | MAGNETIC STORAGE MEDIUM, INFORMATION STORAGE DEVICE, AND CONTROL DEVICE According to one embodiment, a magnetic storage medium, includes a magnetic recording layer that includes: a servo area including predetermined servo information; a user data area including predetermined user information; two preamble areas including a plurality of magn... | 09/02/2010 |
| 20100214686 | HEAD POSITIONING METHOD FOR ECCENTRIC TRACK AND HEAD POSITIONING CONTROL DEVICE Drive waveforms with which extension and contraction characteristics of an actuator corresponding to a number of track eccentricity amounts are stored as data. By reading servo information written in a disk is obtained as a signal indicating a head displacement amount f... | 08/26/2010 |
| 20100214687 | STORAGE DEVICE AND READ/WRITE PROCESSING METHOD THEREFOR According to one embodiment, a storage device includes: a control circuit configured to perform a write retry when data writing fails, wherein the control circuit recognizes that read commands are issued at regular intervals for reproducing continuous pieces of data, an... | 08/26/2010 |
| 20100195244 | SERVO AREA TEST METHOD OF A MAGNETIC RECORDING MEDIUM AND A TEST DEVICE A read signal for one revolution of each of a plurality of tracks jitter of which is cancelled is obtained and a binary-coded image data for the read signal is generated and the track number position of each servo area is specified from the binary-coded image data. Furt... | 08/05/2010 |
| 20100149683 | MAGNETIC DISK DRIVE AND WRITE OFFSET CORRECTION METHOD THEREIN According to one embodiment, a magnetic disk drive uses a patterned medium on which data tracks having a recording layer and grooves having no recording layer as a disk. The magnetic disk drive includes a correction unit which corrects the head center position of a writ... | 06/17/2010 |
| 20100142084 | MAGNETIC MEDIUM HAVING AN ARTIFICIAL PATTERN STRUCTURE USING A GRADIENT OF A MAGNETIZATION REVERSAL FIELD AND A METHOD OF USE THEREOF To avoid the occurrence of a recording error by suppressing the influence that a magneto-static interaction acting between the pattern dots exerts on a recording process and expand a margin for recording synchronization timing lag or tracking misregistration on the patt... | 06/10/2010 |
| 20100134917 | METHOD AND APPARATUS FOR OFFSET CONTROL IN A DISK DRIVE According to one embodiment, a disk drive capable of performing a dynamic offset control (DOC) is provided. The disk drive has an offset module and an updating module. The offset module calculates an offset value that changes during a one-rotation period of a disk, from... | 06/03/2010 |
| 20100079903 | ADAPTIVE DATA RECOVERY PROCEDURE BASED ON RADIAL POSITIONING Data recovery information characterizes data recovery procedure (DRP) steps to be performed within a hard disk drive (HDD) in response to a miss. Particular data recovery information corresponds to a radial position of the actuator and, therefore, the position of the ma... | 04/01/2010 |
| 20100073809 | X-AMR ASSISTED RECORDING ON HIGH DENSITY BPM MEDIA A method of writing information to an area of a bit-patterned medium, in which a magnetized probe generates a magnetic probe field at the area of bit-patterned medium to be written, applying an oriented static magnetic field, and applying an oriented microwave field at ... | 03/25/2010 |
| 20100073808 | POSITION SENSING IN DISCRETE TRACK RECORDING In a particular embodiment, a storage system is disclosed that includes a discrete track media having a plurality of concentric data tracks to store data and including a respective plurality of non-magnetic regions to separate adjacent data tracks. The non-magnetic regi... | 03/25/2010 |
| 20100027158 | Magnetic head for high-frequency field assist recording and magnetic recording apparatus using magnetic head for high-frequency field assist recording A magnetic recording head includes: a magnetic pole; a magnetic shield forming a magnetic circuit with the magnetic pole; and a spin torque oscillator provided between the magnetic pole and the magnetic shield, and formed with a stack structure including a first magneti... | 02/04/2010 |
| 20100020434 | METHOD FOR PRODUCTION OF MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCTION DEVICE A method for the production of a magnetic recording medium includes the steps of forming a magnetic layer on a nonmagnetic substrate, injecting atoms into portions of the magnetic layer to cause the portions to be demagnetized or allowed to acquire amorphousness, thereb... | 01/28/2010 |
| 20100020435 | RECORDING DEVICE WITH WRITE HEAD SPANNING MULTIPLE ROWS OF BIT CELLS AND MULTI-SENSOR READ HEAD In a recording device, a bit patterned medium comprises a track of bit cells, each settable to one of two distinct bit states. The track comprises two generally parallel rows of bit cells. The bit cells in one row are offset in a down track direction from the bit cells ... | 01/28/2010 |
| 20100007985 | METHOD FOR PRODUCING MAGNETIC MEDIUM, MAGNETIC RECORD REPRODUCTION DEVICE, AND MAGNETIC RECORDING MEDIUM One object of the present invention is to provide a method for producing a magnetic recording medium which has excellent magnetic separation properties of the magnetic recording pattern, the present invention providing a method for producing a magnetic recording medium ... | 01/14/2010 |
| 20090310249 | WRITE-ONCE TYPE STORAGE APPARATUS, CONTROL CIRCUIT, AND CONTROL METHOD A recording processing unit sets a track pitch narrower than a writing width of a recording element so that part of the recorded track overlapped with the unused track is overwritten, and continuously records information on a disk medium toward one direction in accordan... | 12/17/2009 |
| 20090268337 | METHOD AND APPARATUS FOR DETERMINING OFFSET BETWEEN READ HEAD AND WRITE HEAD IN A DISK DRIVE According to one embodiment, a disk drive is disclosed which has an offset measuring function for measuring a dynamic offset value necessary to a dynamic offset control using a DTM type disk. A CPU included in the disk drive writes offset measuring position information ... | 10/29/2009 |
| 20090268338 | DATA STORAGE DISK HAVING VARIABLE LOCATION SIGNAL AND DISK DRIVE USING THE DATA STORATE DISK A hard disk drive includes a magnetic head, at least one disk and a controller. A location signal is recorded on the at least one disk for determining a location of the magnetic head in relation to the at least one disk. The controller controls the location of the magne... | 10/29/2009 |
| 20090244767 | CONTROLLER FOR A POSITIONING DEVICE, METHOD FOR CONTROLLING A POSITIONING DEVICE, POSITIONING DEVICE, AND LITHOGRAPHIC APPARATUS PROVIDED WITH A POSITIONING DEVICE A controller for a positioning device is constructed and arranged to receive a position signal indicative of a position of the positioning device, compare the position signal to a set-point signal indicative of a desired position of the positioning device to obtain an e... | 10/01/2009 |
| 20090207521 | TECHNIQUES FOR IMPROVING PARALLEL SCAN OPERATIONS Various technologies and techniques are disclosed for improving performance of parallel scans. Disk head randomization that occurs when performing a parallel scan is minimized by assigning a worker entity to each disk involved in the parallel scan, and by ensuring data ... | 08/20/2009 |
| 20090201602 | LONG-TERM ASYMMETRY TRACKING IN MAGNETIC RECORDING DEVICES A technique tracks head asymmetry of a magnetic recording device over time. In particular, a reference pattern having a known fundamental/reference frequency may be read from a reserved track of a magnetic recording medium to produce a response signal, and signal power ... | 08/13/2009 |
| 20090180207 | HARD DISK DRIVE AND METHOD OF CONTROLLING AUTO REASSIGN OF THE SAME A method of controlling auto reassign of a hard disk drive, including measuring a position error signal (PES) value from at least one sample track of a disk when a fault is generated in a recording and reproduction process of the hard disk drive, comparing the measured ... | 07/16/2009 |
| 20090168224 | METHOD AND APPARATUS FOR OFFSET CONTROL IN A DISK DRIVE According to one embodiment, there is provided a disk drive that can perform dynamic offset control (DOC). The disk drive has a magnetic head, a disk, and offset calculating modules. The magnetic head has read head. Offset-measuring position data is written in a non-ser... | 07/02/2009 |
| 20090168225 | DISK DRIVE DEVICE AND HEAD POSITIONING CONTROL METHOD According to one embodiment, a disk drive includes a detection signal producing module configured to produce a detection signal by reading each of the spiral servo patterns, the spiral servo patterns being read by a head while the head scans a circumferential direction ... | 07/02/2009 |
| 20090168222 | Correcting a track pitch error with a subsequent servo-write pass A method for correcting a track pitch error in servo tracks written on a magnetic recording media coupled with a disk surface, by using a subsequent servo-write pass, comprises propagating servo tracks across the magnetic recording media in a previous servo-write pass. ... | 07/02/2009 |
| 20090168223 | Servo track writer clockhead radius jig A servo track writer (STW) clockhead radius jig is disclosed. One embodiment provides a hard disk drive assembly including a base having a cutaway portion to provide visual access therein. In addition, a disk is mounted in the hard disk drive assembly, this disk having ... | 07/02/2009 |
| 20090153998 | STORAGE MEDIUM REPRODUCING APPARATUS AND STORAGE MEDIUM REPRODUCING METHOD A storage medium reproducing apparatus includes a storage medium that records data; a reproducing head that reads the data recorded in the storage medium; a positioning controlling unit that performs positioning control of the reproducing head with respect to tracks bas... | 06/18/2009 |
| 20090122439 | Mitigating the effects of disturbances of a disk drive Embodiments of mitigating the effects of disturbances of a disk drive are disclosed. One method includes sensing a position error signal of a transducer coupled to a surface of the disk drive, wherein the position error signal aids in control of an actuator of the disk ... | 05/14/2009 |
| 20090103204 | BIT PATTERNED MEDIUM HAVING SUPER-TRACK, METHOD OF TRACKING TRACK OF BIT PATTERNED MEDIUM, HEAD APPROPRIATE FOR BIT PATTERNED MEDIUM, AND INFORMATION RECORDING/REPRODUCING APPARATUS INCLUDING BIT PATTERNED MEDIUM HEAD Provided are a bit patterned medium having a super-track, a method of tracking a track of the bit patterned medium, a head appropriate for the bit patterned medium, and an information recording/reproducing apparatus including the bit patterned medium and the head. The b... | 04/23/2009 |
| 20090086363 | TRANSDUCER POSITIONING RESPONSIVE TO COMPLEX POSITION ERROR SIGNAL Positioning of a transducer is controlled in response to real and imaginary component signals that are formed from a position error signal (PES) which is indicative of the transducer location on a media.... | 04/02/2009 |
| 20090073599 | Perpendicular magnetic recording medium and magnetic recording and reproducing apparatus using the same Embodiments of the present invention provide a perpendicular magnetic recording medium suitable for high density recording. According to one embodiment, a magnetic recording layer comprises four layers in which a first magnetic layer, a magnetic coupling layer, a second... | 03/19/2009 |
| 20080297942 | Drive unit Embodiments in accordance with the present invention provide a drive unit that is capable of satisfactorily performing the positioning control with disturbance components included in a position error signal being effectively controlled. According to one embodiment, an e... | 12/04/2008 |
