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VARIABLE SCOPING CAPABILITY FOR PHYSICAL TAPE LAYOUT DIAGNOSTIC STRUCTURE OF TAPE STORAGE DEVICE

Thu, 25 Aug 2016 08:00:00 EDT

According to one embodiment, a controller-implemented method collecting data relating to operation of a tape drive, storing the collected data in wrap sections of a tape map, where the wrap sections of the tape map correlate to physical lengths of tape. The method also includes and storing a subset of the collected data in a slice region upon at least one of experiencing a first trigger condition and reaching a predefined location on a tape. Other systems, methods, and computer program products are described in additional embodiments.



LASER DIODE SUBMOUNT/SLIDER INTERFACE WITH REDUCED THERMAL RESISTANCE

Thu, 25 Aug 2016 08:00:00 EDT

An apparatus comprises a slider of a magnetic recording head, a submount, and an interface defined between the slider and the submount. A laser diode is connected to the submount. A metal layer is provided at the interface between the slider and the submount. The metal layer connects at least about 30% of the surface area of the submount at the interface to the slider and serves as a thermal conduction pathway between the submount and the slider.



LASER DIODE UNIT WITH ENHANCED THERMAL CONDUCTION TO SLIDER

Thu, 25 Aug 2016 08:00:00 EDT

An apparatus comprises a slider having a trailing edge and a leading edge. A laser diode unit comprises a submount and a laser diode mounted to the submount. The submount includes a mounting surface affixed to a first surface of the slider at the trailing edge such that a first surface of the submount faces toward the leading edge of the slider. A thermally conductive material covers the first surface of the submount and at least a portion of the first surface of the slider. The thermally conductive material serves as a thermal conduction pathway between the submount and the slider.



MODE CONVERSION VIA TAPERED WAVEGUIDE

Thu, 25 Aug 2016 08:00:00 EDT

An apparatus includes a write head comprising a near-field transducer at a media-facing surface of the write head and a waveguide extending along a light-propagation direction. The waveguide is configured to receive light emitted from a light source at a fundamental transverse electric mode. The waveguide is configured to deliver the light to the near-field transducer at a transverse magnetic mode which directs surface plasmons to a recording medium in response thereto. The waveguide comprises a core with first and second tapers separated by a straight portion of constant cross sectional width. The first and second tapers successively decrease a cross-sectional width of the core as it nears the near-field transducer. The waveguide includes an end portion between the second taper and the near field transducer. The end portion comprises a top cladding layer, aside cladding layer, and a bottom cladding layer on the side cladding layer.



AUTOMATED DATA STORAGE LIBRARY WITH TARGET OF OPPORTUNITY RECOGNITION

Thu, 18 Aug 2016 08:00:00 EDT

A system according to one embodiment includes a tape library and a tape drive coupled to the tape library. In response to determining that at least one special operation may be performed, the tape library sends a first notification that the tape drive is to remain in a not ready state. The tape library mounts the tape cartridge in the tape drive after determining that at least one special operation may be performed. A method according to one embodiment includes sending a first notification that a tape drive is to remain in a not ready state in response to determining at least one special operation may be performed by said tape drive upon mounting of a tape cartridge therein. The tape cartridge is caused to be mounted in the tape drive after determining that at least one special operation may be performed.



OPTICAL DATA STORAGE MEDIUM AND USE OF SUCH MEDIUM

Thu, 18 Aug 2016 08:00:00 EDT

A multi-stack optical data storage medium for recording and reading using a focused radiation beam entering through an entrance face of the medium has a first substrate with a first guide groove having a depth GL0



OPTIMIZED RECORDING CONDITION FOR HEAT-ASSISTED MAGNETIC RECORDING

Thu, 18 Aug 2016 08:00:00 EDT

An apparatus comprises a controller configured to apply a writing configuration (WC) to a heat-assisted magnetic recording head to write data to a recording medium. The recording medium includes a plurality of sectors. The controller is further configured to determine an optimized WC for each of the plurality of sectors and initiate a write operation to one of the plurality of sectors. The write operation is configured to be performed by the head utilizing the optimized WC for the respective sector.



METHOD OF WRITING SERVO INFORMATION ON A STORAGE MEDIUM AND ARRANGEMENT FOR WRITING SERVOR INFORMATION ON A STORAGE MEDIUM

Thu, 11 Aug 2016 08:00:00 EDT

According to embodiments of the present invention, a method of writing servo information on a storage medium is provided. The method includes applying heat to a servo portion of a storage medium, and applying a magnetic field to the servo portion that is heated to write servo information on the servo portion. According to further embodiments of the present invention, an arrangement for writing servo information on a storage medium and a method of forming a storage medium are also provided.



OPTICAL DISK DEVICE, LIBRARY SYSTEM AND DATA RECORDING METHOD

Thu, 11 Aug 2016 08:00:00 EDT

An optical disk device records recording data transmitted from a host device onto an optical disk. Then, as a process for checking the recorded data, the optical disk device reproduces the data from the optical disk to perform a Verify process in a recording quality determination unit, while transmitting the reproduced data to the host device. The host device performs a Compare process to compare the reproduced data transmitted from the optical disk device with the recording data transmitted to the optical disk device. At least if it is determined to be poor quality as a result of the Verify process by the recording quality determination unit or if it is determined that the data do not match as a result of the Compare process by the host device, the corresponding data is alternately recorded in an alternate area of the optical disk.



HOLOGRAM REPRODUCING APPARATUS AND HOLOGRAM REPRODUCING METHOD

Thu, 11 Aug 2016 08:00:00 EDT

The purpose of the present invention is to provide a hologram reproducing apparatus and a hologram reproducing method, which are suitable for reproducing hologram. The purpose can be achieved by means of a hologram reproducing apparatus, which reproduces information signals by irradiating an optical information recording medium with reference light, and a hologram reproducing method for the hologram reproducing apparatus. The hologram reproducing apparatus is characterized in being provided with: a polarization conversion section, which converts polarization of diffracted light that is generated when the optical information recording medium is irradiated with the reference light; a light receiving section, which receives the diffracted light having the polarization thereof converted by means of the polarization conversion section; and a servo signal generating circuit section, which generates signals for moving the optical information recording medium or the polarization conversion section using the diffracted light received by means of the light receiving section.



CONCURRENT MODULATION AND FRICTIONAL HEATING HEAD DISK CONTACT DETECTION

Thu, 11 Aug 2016 08:00:00 EDT

An apparatus comprises a heat-assisted magnetic recording (HAMR) head, a sensor, and a controller. The HAMR head is configured to interact with a magnetic storage medium. The sensor is configured to produce a signal indicating the occurrence of head-medium contact. The controller is configured to receive the signal and concurrently determine from the signal if the occurrence of head-medium contact is caused by a first contact detection parameter, a second contact detection parameter, or both the first and second contact detection parameters.



HEAT-ASSISTED MAGNETIC RECORDING HEAD-DISK CLEARANCE SETTING

Thu, 11 Aug 2016 08:00:00 EDT

A magnetic recording head comprises a transducer, a heater, a writer and a laser. The transducer is configured to write to a magnetic recording medium during a write operation. The heater, writer and laser are configured to affect a protrusion of the transducer. The heater is calibrated to produce a pre-write heater power to obtain a target pre-write clearance for a write operation through use of a clearance-heater power curve. The curve is generated by measuring a clearance between the transducer and the medium as the heater is cycled from zero to a contact power.



LIGHT SOURCE UNIT, HEAT-ASSISTED MAGNETIC RECORDING HEAD USING THE SAME, AND LIGHT SOURCE FOR LIGHT SOURCE UNIT

Thu, 11 Aug 2016 08:00:00 EDT

A light source unit has a substrate, a light source that is mounted to the substrate. The light source includes; a first emission part that emits a forward light, the forward light being a laser light in an oscillation state; a second emission part that is located on a side opposite to the first emission part and that emits a rearward light, the rearward light being a laser light in an oscillation state; and a light leakage part located at a position different from the first emission part and the second emission part. The light source further includes a photodetector that is provided on the substrate, wherein the photodetector has a light receiving surface for detecting a leakage light that leaks from the light leakage part.



HOLOGRAPHIC STORAGE DISK AND HOLOGRAPHIC STORAGE SYSTEM

Thu, 04 Aug 2016 08:00:00 EDT

A holographic storage disk includes a reflective layer, a storage layer, and quarter-wave plate. A storage layer is disposed on the reflective layer and includes a reflection-structure layer and photosensitive units. The reflection-structure layer has cavities, in which the reflection-structure layer is grid-shaped. The cavities penetrate the reflection-structure layer. The photosensitive units are disposed in the cavities. The quarter-wave plate is disposed between the reflective layer and the photosensitive units.



OPTICAL DISC DEVICE AND SPHERICAL ABERRATION ERROR SIGNAL DETECTION METHOD

Thu, 04 Aug 2016 08:00:00 EDT

There is provided an optical disc device that performs recording on a land and a groove, including an optical path splitter configured to split a luminous flux returning from an optical disc into first and second optical paths, a first detector configured to receive a whole of the luminous flux that has passed through the first optical path, a second detector configured to receive a luminous flux of an inside part of the luminous flux that has passed through the second optical path, a spherical aberration error signal generation unit configured to generate a spherical aberration error signal on the basis of a difference between a first focus error signal obtained on the basis of a detection signal of the first detector and a second focus error signal obtained on the basis of a detection signal of the second detector, a spherical aberration correction unit, and an adjustment unit.



LIGHT INTERFERENCE MODULE AND HOLOGRAPHIC STORAGE APPARATUS

Thu, 04 Aug 2016 08:00:00 EDT

A light interference module includes an object lens, a first light-guiding element, and a second light-guiding element. The object lens is configured to project a signal light beam to an optical storage media. The first light-guiding element is configured to project a first reference light beam to the optical storage media, in which the first reference light beam and the signal light beam produce a first interference pattern on the optical storage media. The second light-guiding element is configured to project a second reference light beam to the optical storage media, in which the second reference light beam and the signal light beam produce a second interference pattern on the optical storage media, and the first interference pattern is different from the second interference pattern.



INFORMATION RECORDING MEDIUM AND REPRODUCTION DEVICE

Thu, 04 Aug 2016 08:00:00 EDT

An optical disk (100) of the present invention includes (i) a medium information region (101) (a) in which type identification information is recorded by recesses and/or protrusions which are formed by a given modulation method and whose lengths are longer than a length of an optical system resolution limit of a playback device and (b) in which first address information is recorded in a first address data format and (ii) a data region (102) (a) in which content data is recorded by recesses and/or protrusions which are formed by the given modulation method and which include a recess and/or a protrusion whose length is shorter than the length of the optical system resolution limit and (b) in which second address information is recorded in a second address data format.



HOLOGRAPHIC DEVICE AND METHOD FOR DATA READING USING THE SAME

Thu, 04 Aug 2016 08:00:00 EDT

A holographic device includes a holographic storage device, a shearing interferometer, and an optical receiver. The holographic storage device is configured to provide a disk with a reading light beam to make the reading light beam become a diffracted light beam after the reading light beam is diffracted in the disk. The shearing interferometer is configured to receive the diffracted light beam and to transform the diffracted light beam into a first light beam and a second light beam. The optical receiver is configured to receive the first light beam and the second light beam provided by the shearing interferometer.



THERMALLY-ASSISTED MAGNETIC RECORDING HEAD

Thu, 04 Aug 2016 08:00:00 EDT

A thermally-assisted magnetic recording head of the present invention includes: a stacked-layer structure including a first yoke, a second yoke, a first coil, a second coil, and a waveguide; a plasmon generator; a magnetic pole; and one or more contact pillars connecting the first coil in series to the second coil. Here, one or both of the first coil and the second coil include a plurality of wiring patterns connected in parallel.



ACCESSOR AND LIBRARY DEVICE

Thu, 28 Jul 2016 08:00:00 EDT

An accessor includes a main body unit configured to convey a recording medium in a first direction, the main body unit being attached to a housing of a library device to be movable in the first direction, a picker configured to convey the recording medium in a second direction intersecting with the first direction, the picker being mounted on the main body unit to be movable in the second direction, and a cleaner mounted on a surface of the picker along the second direction.



OPTICAL DEVICE AND OPTICAL DISC RECORDING OR REPRODUCING METHOD

Thu, 28 Jul 2016 08:00:00 EDT

According to an optical disc, a track, where data is recorded in predetermined block units, is formed by wobbling at a spatial period in accordance with a radial position, and the track is divided into zones in a radial direction. Data is recorded in each of the zones at a predetermined line density based on a ratio n/m of the number of bits of a bit pattern of recording data to one wavelength of wobbling. The optical disc includes a first area having one of the zones, a second area having one of the zones different from the one of the zones in the first area, and a line density of data different from a line density of data in the first area, and a BCA where a zone format identifier specifying a zone table defining a boundary position of each of the zones and the ratio n/m is recorded.



BIO-DISC DETECTION DEVICE

Thu, 28 Jul 2016 08:00:00 EDT

A bio-disc detection device is provided. A spindle motor is disposed on a chassis for rotating a bio-disc. The bio-disc has a detection groove disposed thereon. The chassis has an optical pick-up head disposed thereon for emitting a light beam to irradiate the detection groove. A receiver receives a light flux passing through the detection groove. A magnetic field generator generates a magnetic field which uniformly covers the detection groove. The chassis has a bracket disposed thereon for fixing the receiver and the magnetic field generator, such that the receiver, the magnetic field generator, the spindle motor and the optical pick-up head are fixed on the chassis of the same foundation member.



RECORDING APPARTUS, SERVER APPARTUS, RECORDING METHOD, PROGRAM AND STORAGE MEDIUM

Thu, 21 Jul 2016 08:00:00 EDT

A non-transitory computer-readable storage medium and information processing apparatuses. The medium stores instructions which, when executed by a computer, cause the computer to perform a method including automatically reading first management data from a first storage medium. The first management data identifies files of source data stored on the first storage medium. One of the files of source data is automatically identified based on the first management data and second management data. The second management data identifies files of transferred data stored on a second storage medium. The one of the files of source data is absent from the second storage medium and automatically transferred to the second storage medium. The one of the files of source data being transferred becomes one of the files of transferred data. The method further includes automatically displaying transferring status of the one of the files of source data by a symbolic figure.



THERMALLY-ASSISTED MAGNETIC RECORDING HEAD INCLUDING A MAIN POLE AND A PLASMON GENERATOR

Thu, 21 Jul 2016 08:00:00 EDT

A thermally-assisted magnetic recording head includes a main pole and a plasmon generator. The main pole has a front end face located in the medium facing surface. The plasmon generator has a near-field light generating surface located in the medium facing surface. The front end face of the main pole includes a first end face portion and a second end face portion. The second end face portion is located farther from the near-field light generating surface than is the first end face portion, and is greater than the first end face portion in width in the track width direction. The first end face portion and the near-field light generating surface are equal in width.



ARTICLES INCLUDING A NEAR FIELD TRANSDUCER AND AT LEAST ONE WAVEGUIDE

Thu, 21 Jul 2016 08:00:00 EDT

Systems that include an energy source configured to provide transverse electric (TE) mode energy; a channel waveguide configured to receive energy from the energy source, the channel waveguide having at least one mirror plane; and a near field transducer (NFT) configured to receive energy from the channel waveguide, the NFT having at least one mirror plane.



DISK DRIVE HEAD SUSPENSION TAIL WITH A NOBLE METAL LAYER DISPOSED ON A PLURALITY OF STRUCTURAL BACKING ISLANDS

Thu, 21 Jul 2016 08:00:00 EDT

A head suspension assembly for a disk drive includes a load beam and a laminated flexure that comprises a stainless steel layer, a copper trace layer, and a dielectric layer between the stainless steel layer and the copper trace layer. The laminated flexure includes a flexure tail that extends away from the load beam to a flexure tail terminal region. The copper trace layer includes a plurality of flexure bond pads in the flexure tail terminal region. The stainless steel layer includes a plurality of backing islands in the flexure tail terminal region. Each of the plurality of backing islands is aligned with a corresponding one of the plurality of flexure bond pads. A noble metal layer is disposed on the plurality of backing islands.



METHODS OF FORMING MATERIALS FOR AT LEAST A PORTION OF A NFT AND NFTS FORMED USING THE SAME

Thu, 21 Jul 2016 08:00:00 EDT

A method including depositing a plasmonic material at a temperature of at least 150° C.; and forming at least a peg of a near field transducer (NFT) from the deposited plasmonic material.



HOLOGRAPHIC DATA STORAGE SYSTEM

Thu, 07 Jul 2016 08:00:00 EDT

Provided is a holographic data storage system characterized by including: a first polarizing beam splitter (PBS), wherein at least either of a first lens module and a second lens module transmits P-polarized light and reflects S-polarized light; a relay lens collecting light passing through the first PBS; a mirror reflecting the light collected through the relay lens back to the relay lens; and a quarter wave plate located between a second PBS beam splitter and the relay lens, converting transmitted linearly polarized light into circularly polarized light, and converting the circularly polarized light into linearly polarized light. By reducing the volume of the relay lens, it is possible to decrease the size of the holographic data storage system, and by decreasing the number of lenses, it is possible to lower manufacturing costs.



OPTICAL MEDIUM REPRODUCTION APPARATUS AND OPTICAL MEDIUM REPRODUCTION METHOD

Thu, 07 Jul 2016 08:00:00 EDT

The present disclosure relates to a reproduction apparatus. The reproduction apparatus may comprise an optical filter and electric filters. The optical filter may be configured to provide electrical signals corresponding to regions of an optical beam returning from an optical medium, the optical beam being incident on the optical filter, the regions of the optical beam corresponding to different bands in a line density direction and/or a track density direction. The electric filters may be configured to provide outputs based, at least in part, on the electrical signals provided by the optical filter, wherein the reproduction apparatus is configured to obtain a reproduced signal by combining the outputs of the electric filters.



MOVING-COIL TYPE STEREO PICKUP CARTRIDGE

Thu, 30 Jun 2016 08:00:00 EDT

Provided are a vibration unit which includes a pair of right and left coils that vibrate in response to vibration of a stylus attached to a cantilever and a magnetic circuit which includes a magnet and a pair of yokes and forms a magnetic path. The coils to be disposed in a gap between the pair of yokes are flat coils having perfect circular shapes, and V-shaped notches are formed on opposing surfaces, with the coils interposed therebetween, of the pair of yokes 4. An intersection angle of the V-shaped notch is set to be an angle to allow channel separation between right and left output signals to be obtained by the pair of coils to be equal to or larger than 20 db.



PHASE ERROR DETECTOR AND OPTICAL DISC DEVICE

Thu, 30 Jun 2016 08:00:00 EDT

A phase error detector includes a sine wave generation circuit that generates a sine wave signal, based on a first input signal of a first period, a cosine wave generation circuit that generates a cosine wave signal, based on the first input signal, a first calculator that calculates a phase difference between the sine wave signal and a second input signal of a second period, a second calculator that calculates a phase difference between the cosine wave signal and the second input signal, and a first selection unit that outputs the phase difference calculated by the first calculator when the phase difference calculated by the second calculator is within a predetermined range, and outputs a predetermined value having a same sign as a sign of the phase difference calculated by the first calculator when the phase difference calculated by the second calculator is out of the predetermined range.



DISC SPIN SPEED PROFILE FOR AN OPTICAL DISC

Thu, 30 Jun 2016 08:00:00 EDT

Creating a disc spin speed profile allows the player to store this disc spin speed profile and control disc spin speed based on this disc spin speed profile, simplifying the disc spin speed adjustment. Instead of using a Constant Linear Velocity profile matched to the highest data rate prescribed by the standard, the playback device can establish its own disc spin speed profile that is adapted to the data rate requirements as they vary across the record carrier. Starting the disc spin speed profile with a Constant Angular Velocity part, followed by a Constant Linear Velocity part reduces the disc spin speed at zones at the innermost of the disc, reducing noise and energy consumption.



THERMAL MANAGEMENT OF LASER DIODE MODE HOPPING FOR HEAT ASSISTED MEDIA RECORDING

Thu, 30 Jun 2016 08:00:00 EDT

A method and apparatus provide for determining a temperature at a junction of a laser diode when the laser diode is operated in a lasing state that facilitates heat-assisted magnetic recording, comparing the junction temperature and an injection current supplied during the lasing state to stored combinations of junction temperature and injection current, and determining a likelihood of mode hopping occurring for the laser diode during the lasing state based on the comparison to stored combinations of junction temperature and injection current.



Arrangement for Rotatably Driving a Round Disk

Thu, 23 Jun 2016 08:00:00 EDT

A device for rotary driving of a round disk, for instance a memory disk of a computer, comprises a stator disposed fixedly relative to a frame and a rotor rotatably drivable relative to the stator. According to the invention the rotor comprises a concentric ring to which the peripheral edge of the disk is connected.The stator has an encircling recess, the form of which corresponds to that of the ring such that the ring fits with clearance into the recess. The rotor is provided with two collars of magnetically active elements in angularly equidistant arrangement, and the stator comprises electromagnets disposed at the same angular distances.The arrangement is such that the rotor and the stator together form an annular induction motor.The rotor is preferably suspended magnetically during operation.



MOVABLE CLOSED-CHAIN LINKAGE FOR ROBOT ARM OF MEDIA ELEMENT STORAGE LIBRARY

Thu, 23 Jun 2016 08:00:00 EDT

Utilities (e.g., systems, apparatuses, methods) that reduce robotic assembly contention in media element storage libraries by rotating (e.g., flipping, swinging, etc.) a robot arm of a first robotic assembly mounted over a first of first and second spaced storage arrays in a storage library into a first position between the first storage array and a central reference plane disposed between and parallel to the first and second storage arrays to allow a robot arm of a second robotic assembly to slide or otherwise move past the robot arm of the first robotic assembly (e.g., in a direction along or parallel to an x-axis parallel to the first and second storage arrays), even when the robot arms of the first and second robotic assemblies are disposed at the same height (e.g., along a z-axis that is perpendicular to the x-axis) within the storage library.



RECORDING/REPRODUCING APPARATUS

Thu, 16 Jun 2016 08:00:00 EDT

According to an embodiment, a recording/reproducing apparatus includes a diffraction grating and a light-receiving element. The diffraction grating divides return light from the guide layer in accordance with areas. The areas include a first area and a second area that does not overlap the first area. The light-receiving element includes (i) a first detecting cell group which receives a zero-order beam to which astigmatism is imparted, (ii) a second detecting cell group which receives at least one of a positive and negative first-order beam, which passes the first area and made astigmatic, and (iii) a third detecting cell group which receives at least one of a positive and negative first-order beam, which passes the second area and made astigmatic.



SPINDLE MOTOR, DISK DRIVE APPARATUS, AND METHOD OF MANUFACTURING BASE UNIT OF SPINDLE MOTOR

Thu, 09 Jun 2016 08:00:00 EDT

A method of manufacturing a base unit of a spindle motor includes the steps of: defining a base plate including a support fitting portion; fitting a support to a hole portion passing through the support fitting portion; measuring an inclination of the support fitting portion; calculating a laser irradiation area and a laser irradiation output based on the inclination; irradiating the support fitting portion with a laser beam; and measuring the inclination of the support fitting portion again. The base plate is made of a metal, and is defined by press working, casting, or forging. The support is fitted to the hole portion by crimping, press fitting, or welding. This method reduces the inclination of the support fitting portion, thereby reducing a distortion of the support, which serves as a rotation center of an access portion.



INFORMATION RECORDING AND PLAYBACK DEVICE

Thu, 09 Jun 2016 08:00:00 EDT

An information recording and playback device includes a recording and playback unit, and a controller. The controller divides a recording area of an optical disk into a first recording area which is at an inner circumference side, and a second recording area which is at an outer circumference side. The controller controls the recording and playback unit such that the unit records or plays back data in the first recording area at a first speed, and records or plays back data in the second recording area at a second speed slower than the first speed. The predetermined radius is set to a boundary between an area in which a control residual exceeds a predetermined reference value when servo control related to focusing and tracking is performed on the recording area of the optical disk, and an area in which the control residual does not exceed the predetermined reference value.



Angled Waveguide

Thu, 09 Jun 2016 08:00:00 EDT

An apparatus has an input surface configured to receive energy emitted from an energy source in a first mode. A mode order converter is configured to convert the energy from the first mode to a second mode. The waveguide of the apparatus has an input end disposed proximate the input surface and configured to receive the energy in the first mode. The waveguide has an output end disposed proximate a media-facing surface and configured to deliver energy in the second mode. The output end is at an oblique angle to a cross-track line at an intersection of the media-facing surface and a substrate-parallel plane.



DEVICES INCLUDING AT LEAST ONE INTERMIXING LAYER

Thu, 09 Jun 2016 08:00:00 EDT

Devices that include a near field transducer (NFT), the NFT including a peg having five surfaces, the peg including a first material, the first material including gold (Au), silver (Ag), aluminum (Al), copper (Cu), ruthenium (Ru), rhodium (Rh), iridium (Ir), or combinations thereof; an overlying structure; and at least one intermixing layer, positioned between the peg and the overlying structure, the at least one intermixing layer positioned on at least one of the five surfaces of the peg, the intermixing layer including at least the first material and a second material.



REPRODUCING DEVICE

Thu, 02 Jun 2016 08:00:00 EDT

A reproducing device (100) includes (i) an optical pickup (6) for irradiating, with reproduction light, an optical disk (1) which is a super-resolution medium, (ii) an RF signal processing circuit (9) for converting, into a reproduction signal, light which reflected off optical disk (1), (iii) an i-MLSE detecting section (141) for evaluating quality of the reproduction signal, and (iv) a spherical aberration correcting section (142) for correcting a spherical aberration by using a result of evaluation of the quality of the reproduction signal.



OPTICAL MEDIUM REPRODUCTION APPARATUS AND METHOD OF REPRODUCING OPTICAL MEDIUM

Thu, 02 Jun 2016 08:00:00 EDT

An optical medium reproduction apparatus for optically reproducing an optical medium where a plurality of tracks are formed, including: a detection unit for splitting a cross section of a beam returned from the optical medium into a plurality of regions and for forming respective detection signals of a plurality of the regions; a multiple input adaptive equalizer having a plurality of adaptive equalizer units, wherein the respective detection signals of a plurality of the regions are inputted into the plurality of adaptive equalizer units, and the outputs of the plurality of adaptive equalizer units are computed to from equalization signals; a binarization unit for binarizing the equalization signals to provide binary data; and an equalization error computing unit for determining an equalization error from equalization target signals provided based on the binary data from the binarization unit and the equalization signals outputted from the multiple input adaptive equalizer, and providing the adaptive equalizer units with the equalization error as control signals for adaptive equalization.



TRACKING CONTROL DEVICE, TRACKING CONTROL METHOD, AND OPTICAL DISC APPARATUS

Thu, 02 Jun 2016 08:00:00 EDT

A tracking control device includes a signal detector that detects a tracking error signal, and a crossing direction, a crossing period and a crossing velocity of an objective lens from a detection signal of an optical detector, a tracking drive signal generator that generates a tracking drive signal on the basis of the tracking error signal, a velocity-reduction drive signal generator that generates a velocity reduction drive signal for converging the crossing velocity into a vicinity of zero on the basis of the crossing direction and the crossing period, a loop switch, and a system controller that causes to executes velocity reduction driving for driving the objective lens actuator on the basis of the velocity reduction drive signal and that controls each of the members so as to switch from the velocity reduction driving to driving for driving the objective lens actuator on the basis of the tracking drive signal.



Data Storage Device with Wear Level Identification

Thu, 26 May 2016 08:00:00 EDT

A transducing head may be connected to a controller and positioned proximal a data storage medium. The controller can be connected to a wear level identification circuit and configured to identify a first data region of the data storage medium having a first wear level and a second data region of the data storage medium having a second wear level. The first and second wear levels can respectively correspond to different amounts of component degradation of the data storage device.



FLEXIBLE VIRTUAL DEFECT PADDING

Thu, 26 May 2016 08:00:00 EDT

Technologies are described herein for performing flexible virtual defect padding of bad sectors on recording media of a storage device. A defective sector on a data track of a recording medium in the storage device is detected. The size and position of a physical defect within the defective sector are determined, and one or more sectors adjacent to the defective sector on the data track are mapped as virtual defects based on the size and position of the physical defect within the defective sector.



METHOD AND SYSTEM FOR MONITORING OF LIBRARY COMPONENTS

Thu, 26 May 2016 08:00:00 EDT

Embodiments of the present invention provide a method for monitoring components in a library by tracking the movement of library components. By tracking the movement of library components, the degradation of library components can be monitored and the reliability of library components determined, allowing unreliable components to be bypassed or replaced, enhancing the reliability of the library and preventing data loss.



VARIABLE WRITTEN TRACK WIDTHS FOR ATTRIBUTE-BASED STORAGE

Thu, 26 May 2016 08:00:00 EDT

A storage device controller is configured to select one of multiple written track widths for a storage location based on a write attribute of data to be recorded at the storage location. According to one implementation, the storage device controller is further configured to select a power level for a heat-assisted magnetic recording (HAMR) device based on the write attribute.



INTERLACED MAGNETIC RECORDING IN HAMR DEVICES

Thu, 26 May 2016 08:00:00 EDT

A storage device includes a controller that implements an interlaced magnetic recording scheme with prioritized random access. According to one implementation, a controller is configured to write data at a first linear density to alternating data tracks and write data at a second linear density to one or more data tracks interlaced with the alternating data tracks.



LASER POWER OPTIMIZATION FOR HEAT ASSISTED INTERLACED MAGNETIC RECORDING

Thu, 26 May 2016 08:00:00 EDT

A storage device disclosed herein stores data on a storage media using interlaced magnetic recording (IMR) and it includes a storage controller configured to determine power levels applied to the power source such that power levels applied to heat various tracks can be different from each other. An implementation of the storage device determines the track density, linear densities and power levels for even and odd tracks in IMR HAMR for the storage media.



LASER POWER OPTIMIZATION FOR HEAT ASSISTED INTERLACED MAGNETIC RECORDING

Thu, 26 May 2016 08:00:00 EDT

A storage device disclosed herein stores data on a storage media using interlaced magnetic recording (IMR) and it includes a storage controller configured to determine power levels applied to the power source such that power levels applied to heat various tracks can be different from each other. An implementation of the storage device determines the track density, linear densities and power levels for even and odd tracks in IMR HAMR for the storage media.