Abstract: An optical disc drive includes a memory stored a write strategy, a converting unit which converts a recording data into a recording pulse based on the write strategy stored in the memory, an inspection unit which inspects a state of the recording data from a reproducing signal, a recording controller which executes a recording operation to record the recording data by applying a laser beam corresponding to the recording pulse to an optical disc, suspends the recording operation, judges whether correction of the write strategy according to an inspection result of the inspection unit is necessary, and restarts the recording operation after the write strategy saved in the memory is collected, and a correction unit which corrects the write strategy saved in the memory when the correction of the write strategy according to an inspection result of the inspection unit is necessary.

Abstract: An objective lens driving unit is provided and includes a moving structure having an objective lens and a plurality of driving coils, a permanent magnet and a yoke structure to correspond to the driving coils, a wire holder coupled to the yoke structure and having a plurality of wiring layers buried in a portion of the wire holder, and a plurality of suspension wires to connect the plurality of driving coils to the plurality of wiring layers.

Abstract: An optical disc device includes a position detector which detects a position of the pickup in accordance with a output signal from the first light receiver of a position sensor which receives light from a encoder board, a rotation position detector which detects a rotation position of the disc in accordance a output signal from the second light receiver which receives a reflected light or a transmitted light of the light irradiated onto the variable area of the disc, and a controller which controls a recording dot marks on a label surface of the disc by driving a feed motor to move the pickup based on the rotation position detected by the rotation position detector and the position detected by the position detector and driving the pickup to control a intensity of the laser light in accordance with the rotation position detected by the rotation position detector.

Abstract: An optical disc device includes a laser diode which irradiates an optical disc having a plurality of layers with laser light, a photodetection section which detects laser light reflected by the optical disc, which comprising a pair of sub-photodetectors and a main photodetector provided between the pair of sub-photodetectors, a focus error signal generation circuit which generates a focus error signal from a photodetection signal output by the main photodetector, a tracking error generation circuit which generates a tracking error signal from the photodetection signal output by the main photodetector and a photodetection signal output by the pair of sub-photodetectors, and a layer determination signal processing circuit which generates a layer determination signal from the photodetection signal output by the pair of sub-photodetectors and determines in which of the layers a focus of the laser light is located, on the basis of the layer determination signal and focus error signal.

Abstract: An optical disc apparatus includes an emitter which emits a laser beam to a optical disc, a divided photodetector including a first dived portion and a second dived portion disposed in a light path of the reflected beam from the optical disc, and producing a first photodetector signal and a second photodetector signal, a phase difference detector which produces a phase difference signal from a phase difference between the first and the second photodetector signals, an integrator which produces a integral signal from a integration of the phase difference signal, a tracking controller configure to perform tracking control based on the integral signal, and a limiter which limits a signal to be supplied from the divided photodetector to the phase difference detector or a signal to be supplied from the phase difference detector to the integrator based on a detection status of a signal detected by the dived photodetector.

Abstract: A virtual data storage system stores data as data objects to a plurality of storage devices in accordance with storage management policies. The system manages multiple copies of stored data objects on multiple media types over time. Storage pools define groups of media that are to be treated in a uniform manner. A policy is composed of a series of policy copy/delete rules that direct movement of data objects into the storage pools. A rule defines a destination storage pool, a length of time that the data objects are to remain in the destination storage pool, and a data source for the data objects. Copy and delete actions are performed to manage copies of data objects among the storage pools in accordance with the policy.

Abstract: An optical disc device includes a conductive member of a bezel assembly with openings formed by a plurality of parting lines, and gaskets are attached to the upper and lower sides of the conductive member using conductive adhesion bond.

Abstract: A system, method and media drive for selectively encrypting a data packet. The system includes an encryption key for use in encrypting the data packet, a verification data element derived from the encryption key, an encryption engine for selectively encrypting the data packet using the encryption key, and a verification engine in electronic communication with the encryption engine. The verification engine is configured to receive the encryption key and the verification data element, determine when the verification data element corresponds to the encryption key as received by the verification engine, and prohibit encryption of the data packet by the encryption engine when the verification data element does not correspond to the encryption key as received by the verification engine.

Abstract: A method for selectively controlling reutilization of space in a virtual tape system (VTS) having a buffer and a multiple volume tape cartridge includes transferring data volume files to the VTS. The buffer transfers the data making up these files as virtual tape volumes (VTVs) to different locations of the cartridge for storage. A file is selectively designated for the VTS to delete from storage after a date included with the file has elapsed by deleting the VTVs corresponding to the file from the cartridge to reuse space of the cartridge. The method includes detecting if a file transferred as VTVs to the cartridge has been designated for deletion. The VTS is prohibited from deleting the file after the date has elapsed if the file was not designated for deletion and is allowed to delete the file after the date has elapsed if the file was not designated for deletion.

Abstract: An optical disk apparatus includes a signal detection unit which detects a signal corresponding to a wobbling guide groove formed on an optical disk, a timing signal generating unit which generates first and second timing signals in accordance with an amplitude level of the signal detected, a photodetector which detects reflective light from the optical disk, and a wobble signal generating unit which outputs as a wobble signal a signal which is amplified with a low gain amount by the first timing signal in a case where an arithmetic signal, which is generated for the wobble signal on the basis of a signal detected by the photodetector, is at a high amplification level, and outputs as the wobble signal a signal which is amplified with a high gain amount by the second timing signal in a case where the arithmetic signal is at a low amplification level.

Abstract: The present invention provides apparatus and method for controlling the asymmetrical properties of the response of a magnetic sensor element to a magnetic field produced by the digital data in a magnetic storage device. The present invention also provides an apparatus and method for controlling the bias point of a magnetic field produced by a magnetic sensor element.

Abstract: An optical head includes a first laser diode configured to generate a laser beam with a wave length of ?1, a second laser diode configured to generate a laser beam with a shorter wave length of ?2 than the wave length ?1, a collimator lens arranged so that the laser beams are incident on it, an aperture filter arranged on an optical axis of the collimator lens, and an object lens 0 arranged on the optical axis so that the laser beams passing through the aperture filter are incident on it, wherein the second laser diode is arranged at a position on the optical axis further away from collimator lens than the first laser diode is away from the collimator lens.

Abstract: An optical disc device includes a recording section which records recording information in an optical disk, a reproducing section to reproduce the information recorded in the optical disk, a storage section which stores information Po?n to Po+n or Pb?n to Pb+n of a preceding or succeeding position Po±n or Pb±n while a recording start position Po or a recording interrupt position Pb is defined as a reference, the information being reproduced by the reproducing section, when recording of the recording information is started or recording is restarted after the recording has been interrupted, and processing section which comparing reproduction information obtained by reproducing the information Po?n to Po+n or Pb?n to Pb+n again, cache information stored in the storage section, and the recording information, and then, determining whether or not recording has been normally performed on the optical disk when recording of the recording information terminates or is interrupted.

Abstract: An optical disk device includes a optical pickup head which emits a laser beam to an optical disk and detects light reflected therefrom, a signal output unit which outputs at least a servo signal and RF signal in accordance with the detected light, a gain control unit which determines the type of the optical disk from identification information recorded thereon, and sets first and second adjusted gains for a data recorded region and data unrecorded region, when determining that the optical disk is of a type wherein a light reflectance is higher in the data recorded region than in the unrecorded region, and a gain adjustment unit including a memory storing the first and second adjusted gains, the gain adjustment unit adjusting the gain of the servo signal in the data recorded region, using the first adjusted gain, and in the data unrecorded region, using the second adjusted gain.

Abstract: An optical disk device includes a pickup head, and a controller which controls the pickup head. The controller subtracting a second measured value determined from an amplitude value of the tracking error signal when the pickup head irradiates a second area of the optical disk with a first DVD laser beam, from a first measured value determined from the amplitude value of the tracking error signal output when the pickup irradiates a first area of the optical disk with the first DVD laser beam, to determine an evaluation value. The controller determining that the optical disk is the first DVD if the evaluation value is smaller than a reference value, and determining that the installed optical disk is a second DVD if the evaluation value is larger than the reference value, the second DVD optical disk having a smaller track width than the first DVD optical disk.

Abstract: A recording power determining method comprises writing data consecutively into a plurality of test blocks of an optical disc while changing recording power in such a manner that the arrangement of recording power values is distributed over the arrangement of the test blocks, reproducing the information recorded in the test blocks written into consecutively, determining an asymmetry value for each of the recording power values on the basis of the information in each of the test blocks reproduced, determining an approximation characteristic of the asymmetry value for a recording power on the basis of the asymmetry value for each of the recording power values, and determining a recording power for realizing a specific target value of the asymmetry value from the obtained approximation characteristic.

Abstract: An optical disk apparatus includes an optical pickup head (PUH) which outputs a laser beam through an objective lens. When a control unit receives an instruction to halt data read-out from an optical disk, the control unit moves the PUH to a predetermined position, stores a focus driving voltage corresponding to a position of the objective lens in a memory unit, and halts the output of the laser beam from the PUH. When the control unit receives an instruction to resume the data read-out, the control unit resumes the output of the laser beam from the PUH, starts a focus search on the basis of the focus driving voltage that is stored in the memory unit, moves the objective lens in a direction toward the optical disk, and achieves focus adjustment.

Abstract: An exemplary optical pick-up apparatus of the invention comprises: an optical base; a collimator lens provided on the optical base; a laser source disposed adjacent the collimator lens on the optical base and emitting light that produces heat; and temperature gradient control means, provided between the collimator lens and the laser source on the optical base, for flattening temperature gradient between the collimator lens and its surroundings.

Abstract: A device and method for simultaneously manipulating multiple data storage cartridges or other storage elements in a storage library. The device housing includes an opening for receiving data storage cartridges. A gripping mechanism extends from the opening. The gripping mechanism is adapted to grip a data storage cartridge to be retrieved and to urge the data storage cartridge into the opening. One or more transport mechanisms are attached to one or more inner walls of the housing. The transport mechanisms are adapted such that once a data storage cartridge moves into the opening, the transport mechanisms will urge the data storage cartridge further into the opening until the data storage cartridge is held within the housing. The data storage cartridge can be moved further into the housing such that the gripping mechanism is free to collect additional cartridges.

Abstract: An optical disc apparatus includes an emitter which emits a laser beam to a optical disc, a divided photodetector including a first divided portion and a second divided portion disposed in a light path of the reflected beam from the optical disc, and producing a first photodetector signal and a second photodetector signal, a phase difference detector which produces a phase difference signal from a phase difference between the first and the second photodetector signals, an integrator which produces a integral signal from a integration of the phase difference signal, a tracking controller configure to perform tracking control based on the integral signal, and a limiter which limits a signal to be supplied from the divided photodetector to the phase difference detector or a signal to be supplied from the phase difference detector to the integrator based on a detection status of a signal detected by the divided photodetector.