Sign up


Match Document Document Title
8810956 Technique for optimizing skew in the presence of tape motion  
A method for accurately adjusting skew in the presence of tape motion includes performing a calibration run of magnetic tape in a tape drive. During the calibration run, the method records skew...
8804267 Disk drive predicting spindle motor failure by evaluating current draw relative to temperature  
A disk drive is disclosed comprising a head actuated over a disk, and a spindle motor operable to rotate the disk. A baseline relationship is generated between a baseline current draw of the...
8797672 Dynamic track pitch control for shingled magnetic recording (SMR)  
SMR disk drives are described that adjust track pitch or magnetic write width to compensate for external temperature effects. In one embodiment track pitch is increased when the media temperature...
8791657 Disk drive  
To provide a disk drive capable of inhibiting the occurrence of acoustic noise caused by a voltage pulse when the head is retracted using a speed control method using voltage obtained by rectifying...
8786219 Motor control device  
A motor control device includes: a feedforward computing section for computing a motion reference value and a feedforward driving force based on a motion command; a deviation compensation computing...
8786974 Method and apparatus for controlling a motor  
A method and apparatus for adaptively controlling a motor considering a state of disturbance applied to a system. The method includes changing a frequency bandwidth of a frequency response...
8780471 Linking errors to particular tapes or particular tape drives  
Techniques to determine particular bad tapes or tape drives. All tape and tape drive combinations within a system may be obtained. A read error or a write error that occurs with each tape and tape...
8780483 Automatic unthread and store of data storage device medium  
An apparatus, system, and method for automatic unthreading and storage of storage media helps prevent damage to the media, which can otherwise occur when the storage media is left threaded in a...
8767335 Accurate radius and velocity measurement of tape transports  
A method according to one embodiment includes selecting an initial radius value (Rfull) for an outgoing reel, where Rfull is the initial radius of a tape on the outgoing reel; unwinding the tape...
8767330 Tape cartridge auxiliary memory based library  
A data storage library is described including a plurality of tape cartridges wherein each of the tape cartridges possesses an auxiliary radio frequency memory device in which auxiliary digital data...
8767336 Head wrap procedure  
A method according to one embodiment includes detecting a signal originating from at least one reader of a first outer module of a head as a tape passes thereacross, the head having at least the...
8654475 Stampers and magnetic disks  
A stamper according to an embodiment includes a guide including: a first portion provided in regions to be boundaries between the servo region and the data regions in the bit-patterned medium, the...
8493682 Head wrap procedure  
According to one embodiment, a method includes tracking a magnetic tape moving in a first direction using at least one reader of an inner module of a head having at least the inner module and first...
8488266 Adjustment of tape reel height  
One embodiment is tape drive that includes a take-tip reel onto which tape is wound. A height adjustment assembly adjusts a height of the take-up reel while the tape is being unwound from the...
8458391 Library apparatus and method for controlling the same  
A library apparatus includes a medium name storage unit that stores medium name conversion information in which a virtual medium name specifying a storage medium in a read/write request from a host...
8373941 Automatic unthread to secure tape from sticking to the head  
A system and method for automatically unthreading a tape. The system and method determine whether the drive being at the stop state could cause the tape sticking condition in future after a defined...
8363345 Apparatus, system, and method for automatic unthread and store of data storage device medium  
An apparatus, system, and method for automatic unthreading and storage of storage media helps prevent damage to the media, which can otherwise occur when the storage media is left threaded in a...
8339726 Unique media identifier  
An apparatus and method for providing a unique identifier for data storage media is disclosed herein. The servo track of the data storage media is encoded one or more times with media...
8228629 Reaction control charge pump, capacitor, and transistor to power lead  
The objective of this invention is to provide a motor control device, and a disk drive device using the same, in which during emergency operation it is possible to supply necessary power to the...
8212503 Driving circuit for voice coil motor and method thereof  
The invention provides a driving circuit for a voice coil motor. In one embodiment, the driving circuit includes a logic circuit, a digital-to-analog converter, and an output circuit. The logic...
8208215 Techniques for emulating sequential device with constrained disk drive  
A disk drive apparatus includes at least one disk, a head-arm assembly, and a controller circuit. The head arm assembly includes at least one read/write head. The head-arm assembly is movable to...
8155498 System and method for indexing commercials in a video presentation  
Systems and methods for providing enhanced navigation of stored digital video content based upon an event index. Includes generation and storage of an event index, as well as navigation based on...
8154826 Thin-film magnetic head with variable-volume cavity in medium-opposed surface  
Provided is a thin-film magnetic head in which the magnetic spacing can be appropriately controlled by dynamically and accordingly, by adjusting the pressure working between the thin-film magnetic...
8144416 Hard disk driving circuit and method of driving spindle motor  
A hard disk driving circuit for reducing a maximum amount of current for driving a spindle motor, and a method of driving the spindle motor. The hard disk driving circuit include spindle motor, a...
8094402 Systems and methods for correcting magnetic tape dimensional instability  
Magnetic tape devices encounter read and/or write errors when the tape is not being passed across the head with the proper tension and/or skew angle. According to one embodiment, a system which...
8077420 Method and apparatus for adaptive control and/or use of a vibration sensor in a hard disk drive  
Apparatus and methods are disclosed for adaptive control and/or use of a vibration sensor in a hard disk drive (HDD). The HDD, an assembled circuit board and a control circuit are disclosed. The...
8064155 Storage apparatus  
A storage apparatus includes a magnetic storage medium which is formed with a data portion based on isolated magnetic dots and a servo pattern portion, a drive mechanism which drives the storage...
8045282 Measurement of track eccentricity on bit patterned media  
The eccentricity of tracks defined on a rotating bit patterned media are measured using a readback signal, and the measured eccentricity may be used to control centering of the disk relative to a...
8041449 Bulk feeding disk drives to disk drive testing systems  
A method of supplying disk drives to a disk drive testing system includes placing a disk drive tote, carrying multiple disk drives, in a presentation position accessible to an automated transporter...
8019926 Automatically assigning a multi-dimensional physical address to a data storage device  
A method of assigning a multi-dimensional physical address to a tape-based data storage device is provided. The method includes accessing a first signal from a first communication path electrically...
8009063 Audio system and navigation device  
An audio system for a vehicle includes: a hard disk drive for storing an audio data; an output element for converting the audio data to an electric signal and for outputting the electric signal to...
7995302 Disk drive device and control method of unloading corresponding to fall detection in disk drive device  
Embodiments of the present invention improve the safety against a fall of a disk drive device. In one embodiment, when an HDD has recognized detection result data of a fall sensor to indicate a...
7995303 Overhead calculation in writing synchronized data to magnetic tape  
Various embodiments for writing received synchronized data to magnetic tape having a plurality of wraps using a magnetic tape drive adapted for performing the writing according to an available...
7990649 Method and apparatus to set a wrap angle of a read/write head  
A method is presented for setting a wrap angle of a read/write head having a servo element and multiple read elements, where the servo element and the read elements can detect a servo signal. The...
7986482 Applying whip effect to magnetic tape exhibiting a tape stick condition  
As the result of a tape stick condition of magnetic tape with respect to a tape head, the supply reel and the take-up reel apply a base tension to the magnetic tape therebetween of substantially...
7969674 Data transfer assembly performance characteristics testing  
An apparatus is provided having a data transfer member, and a medium supported by a base adjacent the data transfer member. A medium tilting device supports the base and is selectively positionable...
7962645 Apparatus, system, and method for automatically mapping a tape library system  
An apparatus, system, and method are disclosed for automatically and transparently mapping tape drives within tape libraries to IP addresses. In one embodiment, the tape library includes, a DHCP...
7911727 Controlling motion of storage media  
An apparatus for writing data to a data storage medium on which data is stored in data groups (N−3 to N+1) comprising tracks extending across and spaced from a reference edge of the storage m...
7903363 Same Wrap backhitchless write method to encode data on a tape storage medium  
A method to write information to a tape storage medium by disposing a tape storage medium in a tape drive apparatus comprising a write head. The method moves the tape storage medium in a first...
7881821 Media storage system  
A media storage system includes a disc input element for receiving a media disc, a disc output element for ejecting a disc, and a media reader for reading information from a disc. If insufficient...
7876521 Servo control in tape drives  
Servo control methods and apparatus for a tape drive. A read/write head reads and writes data on magnetic tape with at least one servo track providing transverse position information. At least two...
7859786 Ultra high track density adaptive head core track pitch control  
Apparatuses and methods for adjusting the track pitches of the tracks on a data storage tape. In one variation, the method comprises adjusting the observed pitch between the tracks by applying...
7852597 Storage medium driving apparatus and control method thereof  
A storage medium driving apparatus includes a head slider opposed to a storage medium, an acceleration detector detecting an acceleration of the apparatus. A control circuit retracts the head...
7796354 Method and apparatus for controlling data rate of a tape drive  
A method for controlling data rate of a tape drive is disclosed. The tape drive is connected to a computer system. The tape drive stores data by dividing the data into multiple codeword quads...
7782562 Magnetic recording media and magnetic recording device  
According to one embodiment, a magnetic recording media includes a magnetic recording layer formed on a substrate, in which recording tracks and servo areas are prescribed as patterns of...
7764456 Method for reducing occurrences of tape stick conditions in magnetic tape  
Disclosed is a method for reducing occurrences of tape stick conditions in magnetic tape, the method including stopping functional rotation of each of two bi-directionally rotatable reels of a...
7761244 Selectively mitigating multiple vibration sources in a computer system  
One embodiment of the present invention provides a system that mitigates the effects of multiple vibration sources on a set of hard disk drives (HDDs) within a computer system. During operation,...
7743205 Apparatus and method for virtualizing data storage media, such as for use in a data storage library providing resource virtualization  
A system and method for use in an automated data storage cartridge library defines cartridges for use with an external host computer (“open” cartridges), and cartridges for use only internal to the...
7738210 Position control method of inertial drive actuator and inertial drive actuator  
A position control method of inertial drive actuator includes a movement-amount setting step of setting an amount of movement, a target-position setting step of setting a target position of a...
7733594 Storage device with pulsed motor torque  
A system and method for overcoming adhesion between media and a surface of a storage device in contact with the media. A storage device comprises a media velocity detector and a media drive motor...