253 results about "Optical disk storage" patented technology

A storage file system is provided for data stored on a storage medium, and particularly for storage of data on optical disc storage medium. Each successive or alternate file of data included in the storage medium is represented by a respective allocation extent list with each allocation extent identifying locations of data segments for each file. Data in some data segments or portions of data segments may be shared by two or more files with each file having a respective allocation extent list entry referencing that segment and each such allocation extent maintaining byte-accurate pointers to the start and end of the data relevant to each file within the data segment. An allocation space table containing respective entries for each reference to a data segment or portion of a data segment, and optionally a free-space table identifying those data segments or portions of data segments available for rewriting, may be provided to allow for rapid reclamation of free within the storage medium.

An optical data-storage hard disk drive, which uses stationary Magneto-Optical Microhead Array Chips in place of conventional Flying-Heads, Rotary Voice-Coil Actuators and other similar types of Servo-Tracking mechanisms to transcribe or retrieve digital information to or from at least one non-volatile memory medium's data-surface, using an optical magnetic process of recording and reading data. The Magneto-Optical Microhead Array Chip Hard Disk Drives will have at least one storage disk-platter with two disk-platter data-surfaces containing a multiplicity of concentric data-tracks that rotates at a substantially constant angular velocity. Every Magneto-Optical Microhead Array Chip will comprise a (VCSEL) "Vertical Cavity Surface Emitting Laser" microhead array having a minimum of one thousand or a maximum of four billion individually addressable VCSELs. Each Magneto-Optical Microhead Array Chip is placed into a stationary position above each disk platter data-surface using a chip-positioning circuit board. While the number of cylinder / tracks available to each Magneto-Optical Microhead Array Chip is determined by the number of VCSEL microheads contained within a Magneto-Optical Microhead Array Chip's microhead array (e.g., "325,000" vertical cavity surface emitting laser microheads would therefore equal "325,000" corresponding cylinder / tracks).

The present invention more efficiently retrieves and processes data stored on an optical disk in a DVD-ROM format. Generally, the retrieval and processing of data includes inner and outer code error correction for a Reed-Solomon product like code and an error detection process for evaluating an extent of errors in a sector of data. For this device, the sector of data is encoded within a plurality of inner codes and parts of plural sectors encoded within each outer code. The device calculates an initial and an intermediate error detection value for data within the sector. The target for the error detection value is non-zero because the data within the sector are scrambled. If there is a match between the initial or intermediate error detection value, the sector can be presumed to be free of errors. Decisions as to whether error correction operations are to be made or how error correction operations are to be performed are then made on the basis of the knowledge that some or all of the sectors within a block of DVD-ROM are free of errors.

This invention relates to a security type disc storage case, including case cover, case back, and case bottom, which are connected by a folding V-shaped trough, characterized in that a security board, through which it can be judged that whether the disc storage case is once opened, is set at the outer side of the case cover. After the disc storage case is packed, the security board, case cover, and case bottom are connected together, which means the case is never opened. After purchasing the disc stored in such a case, the consumer can tear part of the security board, then the case cover can be opened freely, and the disc inside can be taken out or put in conveniently.

A wobble signal for an optical storage device is generated by adjusting a center frequency (ω0) of a band pass filter based on an expected frequency of the wobble signal and / or an estimated position of a pick-up apparatus and filtering an input signal corresponding to the wobble signal from the pick-up apparatus with the adjusted band pass filter to provide the wobble signal. Adjusting the center frequency (ω0) of the band pass filter may also be based on a measured phase change of the band pass filter. Systems for generating a wobble signal, wobble signal detection circuits and optical storage devices are also provided.

The present invention more efficiently retrieves and processes data stored on an optical disk in a DVD-ROM format. Generally, the retrieval and processing of data includes inner and outer code error correction for a Reed-Solomon product like code and an error detection process for evaluating an extent of errors in a sector of data. For this device, the sector of data is encoded within a plurality of inner codes and parts of plural sectors encoded within each outer code. The device calculates an initial and an intermediate error detection value for data within the sector. The target for the error detection value is non-zero because the data within the sector are scrambled. If there is a match between the initial or intermediate error detection value, the sector can be presumed to be free of errors. Decisions as to whether error correction operations are to be made or how error correction operations are to be performed are then made on the basis of the knowledge that some or all of the sectors within a block of DVD-ROM are free of errors.

The invention discloses a magnetic-optical-electric hybrid storage system which comprises an internal memory, a solid-state disk storage area, a magnetic disk storage area and an optical disc storage area. The three storage areas logically form unified storage space and maintain a global file address mapping table to allow a user or external program to perform data addressing and access in a unified and consistent manner. During data storage, a system storage management area automatically selects appropriate physical storage positions and data arrangement manners from the three storage areas according to data access behaviors. When access modes change, the storage management are dynamically selects the appropriate physical storage position and data arrangement manner to perform necessary data migration, and the whole process is transparent to external users. The magnetic-optical-electric hybrid storage system has the advantages that the problems of an existing storage system are solved, the storage features of three storage equipment are reasonably utilized, and data storage efficiency and resource utilization rate are increased.

The present invention more efficiently retrieves and processes data stored on an optical disk in a DVD-ROM format. Generally, the retrieval and processing of data includes inner and outer code error correction for a Reed-Solomon product like code and an error detection process for evaluating an extent of errors in a sector of data. For this device, the sector of data is encoded within a plurality of inner codes and parts of plural sectors encoded within each outer code. The device calculates an initial and an intermediate error detection value for data within the sector. The target for the error detection value is non-zero because the data within the sector are scrambled. If there is a match between the initial or intermediate error detection value, the sector can be presumed to be free of errors. Decisions as to whether error correction operations are to be made or how error correction operations are to be performed are then made on the basis of the knowledge that some or all of the sectors within a block of DVD-ROM are free of errors.

The invention relates to the field of data storage and discloses a rotary disc storage device. The device comprises a rotatable juke-box body. A multi-layer s arranged inside the juke-box body. Along the circumferential direction, each layer of the disc holder is provided with a set of optical disc accommodation lattices. The openings of the accommodation lattices are arranged towards the outside. The optical disc accommodation lattices are vertically aligned. According to the invention, the high-density storage function of optical discs is realized by the rotary optical disc storage device. The above storage device is rotated by an optical disc juke-box, and then a target optical disc can be quickly grabbed. Meanwhile, the data efficiently reading function and the safety protection function can be realized or the backup data of a hard disc module by means of a magneto-optical converged storage device.

According to one embodiment of the invention, an optical disk storage case includes a base, a cover pivotally coupled to the base, a pedestal coupled to the base and having at least one pair of resilient members configured to retain an optical disc thereon, a blocking tongue coupled to a top portion of the cover and extending outwardly therefrom, and a groove associated with a top portion of the base and extending outwardly therefrom. The groove is configured to align the blocking tongue when the optical disk storage case is in a closed position and, when the pedestal is retaining the optical disk, the blocking tongue and the groove are engaged with one another such that access to the optical disk is prevented when a user slightly separates the respective top portions of the base and the cover.

An optical disc based external data storage system for a database comprises a server, and a magnetic disk storage device and an optical disk storage device both connected with the server in a data mode. A database management system, an external storage management system, an application program interface and an extension server are arranged on the server. A magnetic disk database and a database external storage zone are arranged on the magnetic disk storage device. Parts of field data recorded in the database are correspondingly stored in the database external storage zone. The database management system responds to data requests, and database management and data management in the storage device are completed. The external storage management system responds to data requests, and database external storage zone management and data management in the storage device are completed. The application program interface is used for obtaining information of database external storage data, and database external storage of the storage device is completed. The extension server is used for establishing the database external storage zone and determining the positions of the database external storage data in the external storage zone. Database performance and data reliability can be well improved.

This invention relates to a multistage read-only CD and its manufacturing method. This CD has many kinds of recording pits, the vertical section of the recording pits and along the width direction is multistage random shape, and the areas of vertical sections of different stage recording pits are different, and the area of the vertical section of the recording pit fits to the following formula: S=integral h(x)dx, there into, S denotes the area of the vertical section, x shows the coordinate of the width direction of the recording pit, h(x) is the pit depth distribution function on the vertical section of the recording pit, the integral region is the whole vertical section of the recording pit. In addition, it can limit the vernier length of multistage read-only CD. This invention combines the strong points of multistage technology and vernier length limitation coding, can greatly increase the storage capability and data transmitting efficiency of read-only CD without changing the laser wave length and optical aperture, and maintain greatest compatibility to the present read-only CD system.

The invention discloses data storage and read-write equipment based on an off-line optical disk jukebox, a method and a system. the equipment contains multiple off-line optical disk jukeboxes and an off-line optical disk jukebox operating device. Several optical disk cartridge bins are configured inside an optical disk jukebox body of each off-line optical disk jukebox. Several optical disk cartridges for storing optical disks are configured inside each optical disk cartridge bin. The off-line optical disk jukeboxes store optical disk data with no power supply. The off-line optical disk jukebox operating device can movably access each of the multiple off-line optical disk jukeboxes, electrifies corresponding off-line optical disk jukebox and finishes storage and read operations of data. The equipment provided by the invention can finish numerous functions such as automatic loading, parallel read-write, automatic detection, automatic disk printing and the like of optical disks.

The invention belongs to the technical field of data storage and provides a method and device for parallel management of multi-optical-disc data. The device comprises a controller. The controller is connected with a plurality of optical disc drivers through storage interfaces. The controller is connected with a front-end host through a host interface and connected with a memory buffer through a data storage channel. A data distribution table is placed in the memory buffer. The device further comprises an optical disc recording buffering zone and a reading buffer. The method at least comprises one of a data reading method, a data writing method and a data updating method, wherein the data reading method, the data writing method and the data updating method are executed in parallel. Each optical disc driver of the device can be operated independently, parallel reading and writing of the optical disc drivers are achieved through parallel management of data, the overall performance of a whole optical disc storage system is improved, the reading and writing speed of the data is increased, and the waste of bandwidths is avoided.

The invention provides a reversible phase-change material high-density storage device based on a double beam super-resolution technology, which comprises a diffraction limited excitation light generation assembly, a suppression light generation module and an optical disk assembly, wherein the excitation light generation assembly is used for initiating optical recording; the central light strengthof the suppression light generation assembly is zero, and the suppression light generation assembly is used for suppressing optical recording; a recording layer of an optical disk in the optical diskassembly is formed by a semiconductor alloy phase-change material, and the phase-change material has reversible transformation between a crystalline phase and an amorphous phase under the action of laser light, so that the material is enabled to have corresponding reversible changes in reflectivity, refractive index and the like, and super-resolution recording for information can be realized; andlight-emitting ions are doped into the phase-change material, fluorescent light is emitted under the induction of excitation light with appropriate wavelength, and super-resolution reading of the recorded information can be realized. The reversible phase-change material high-density storage device and method based on the double beam super-resolution technology can realize a function of super-resolution reading and writing, and solve a problem that the storage capacity of the optical disk cannot be further improved due to the restriction of the diffraction limit.

The invention is suitable for the technical field of data storage, and provides a mass file parallel burning method and device. The method includes the step of file segmentation, the step of sub-file addition, the step of threshold value judgment and the step of data burning. The invention provides a file management and parallel burning scheme based on an optical disc storage system. In the scheme, files in the optical storage system can be automatically organized and distributed, a file set is distributed to each optical disc, and the aim of enabling multiple optical disc drives to simultaneously work so as to conduct parallel data burning is achieved.

An optical disc storage system employs a read / write pick-up head assembly in which the optical path between the disc and the read / write light source, usually a laser diode, includes both a conventional objective lens formed of glass or plastic, with a fixed focus, and a liquid crystal lens which is electrically tunable to vary its refractive index and focal distance. The optical signal reflected from the disc is passed through this hybrid pick-up head assembly and demodulated to detect errors in the focus of the pick-up head and the tracking, and to adjust the focus by modifying the electrical signals applied to the LCD lens, and move the pick-up head in the plane of the disc to address the appropriate track.

A method of storing / retrieving information to / from an optical disc by means of an optical system with a cut-off frequency νcut-off, above which frequencies cannot be detected, is disclosed. The invention relates to Run Length Limited encoded information. According to the invention, some frequencies of the encoded information can be higher than cut-off frequency of the optical system, such that the equation 4*(d+1)*Lcd*NA / λlaser<1 is satisfied, where d+1 is the minimum run length of the coding, Lcd is the length of a channel bit, NA is the numerical aperture and λlaser is the wavelength of the optical system. Hereby, the capacity of the optical disc is increased, while the prevailing coding technique is used. Moreover, the invention relates to a disc for storing of data, a drive capable of storing data and an apparatus for manufacturing optical discs.

Methods, systems, and computer readable media are provided for accessing and compressing data stored in a media library, as well as tracking optical media with media tags and cartridge manifests within a library. In one embodiment, a simulation layer of a hybrid storage appliance allows libraries of optical media with write-once read-many (WORM) properties to look like logical block devices with non-WORM characteristics. In another embodiment, data from a user's files is compressed by the media library appliance in chunks in such a way that coarse granularity seeking is possible within a compressed user file. In another embodiment, a media cloud is used by a hybrid storage appliance to seamlessly recover from failures in optical media, library robotics, optical drives, and network connections during the creation, recovery, and distribution of data. In another embodiment, cartridge manifests and media tags are used to track optical media within a library.

This invention relates to a shaping device for semiconductor lasers, in which, a semiconductor laser is set on a bracket, one-dimension grads refractive index lens, a panel lens, is set on the direction where the laser emits beams, the laser is incident along the thickness direction of the lens, the incident face and the exit surface of which are planes or cylinder sides vertical to the laser fast axis, the distance of the lens to the laser is 0.05-2.5mm, which has the advantages of simple structure, small volume, easy to be debugged, centralized optical energy and small loss of optical energy.

A CD-ROM staggered optical storage system includes CD-ROM drive walls, a CD storage rack, a CD-ROM manipulator assembly, a distribution box, etc. The CD-ROM drive walls are composed of two rows of CD-ROM drive arranged in opposite staggered arrangement, the CD storage rack is used for storing that CD case, a stack of optical disc is stored in each optical disc case. The CD-ROM manipulator assemblyincludes a CD-ROM cassette push-pull manipulator, a CD access manipulator and a guide rail support, and the whole system running process comprises the optical disc manipulator assembly is moved alonga track in a channel between two rows of optical disc storage frames to a designated optical disc cartridge position, the push-pull manipulator of the optical disc case pulls out the optical disc case, the optical disc access manipulator takes out the optical disc and puts it into the optical disc drive in turn, after reading and writing, the optical disc access manipulator takes out the opticaldisc and puts it back into the optical disc case, and the push-pull manipulator pushes the optical disc case back to the original position.

Novel optical disc storage units comprising transparent polypropylene are provided. Such storage units exhibit sufficient impact resistance to protect the target disc and sufficient clarity that any informational literature may be placed entirely within the storage unit and easily viewed and read through the walls thereof without impediment. Furthermore, the target storage unit must also include a spine section of sufficient width to permit a section of the informational literature to be placed internally thereon and viewed and easily read (such as, for example, the title and accompanying language describing the target disc placed therein) substantially without impediment as well. Additionally, provided therein are novel insert trays that simultaneously permit proper placement of such internally placed informational literature against the internal portion of the aforementioned walls, and particularly the spine portion, as well as provide antitheft properties. Such insert trays are designed to encompass any discs placed therein to the extent that such discs cannot exit such trays when the container is in closed position without breaking the disc itself. Specific novel storage units, in addition to these necessarily transparent walls and spine portions, are also possible to maximize the benefits of the transparent properties thereof.

A method for measuring a surface structure of a near-field object is provided. A light source produces at least a first light beam and a second light beam; guiding the first light beam and the second light beam to enter the SIL for interacting with the object surface. This method can be used in, for example, a near-field optical disc storage system, wherein reflection intensities of the first and second light beams are used to measure two distances between the SIL and the optical disc at two positions corresponding to the first and second light beams. A surface structure, such as a tilt angle or an average distance between the disc and the SIL or disc roughness, is obtained by analyzing the above-mentioned positions and distances. The first and second light beams are produced, for example, by a diffraction technology or by a single laser diode with multiple beams.

The present invention provides a decoding system and method for an optical disk storage device to receive and decode the data of the disk. The present invention does not need to increase the clock frequency and the bus width of the decoding system, it can effectively decrease the access times to the data buffer and the system response time by changing the structure of the conventional decoding system, in this way the present invention increases the parallel processing capability and the decoding speed of the system, thus, it can enhance the entire device to become a high speed optical storage device.

The invention discloses an optical disk library array comprising optical disk library modules. Each of the optical disk library modules comprises an optical disk cassette, a drive, a manipulator assembly and a drive control unit. The optical disk library array comprises a plurality of optical disk library modules, an optical disk library server, a high-speed data interface unit and a control lumped unit, wherein the high-speed data interface unit and the control lumped unit are respectively connected with the optical disk library server; the drive of each optical disk library module is connected with the high-speed data interface unit through a data flow channel; and the drive control unit of each optical disk library module is connected with the control lumped unit through a control signal channel. The invention can greatly improve the read-write speed of the whole optical disk storage system and improve the reliability, the fault tolerance and the rapid recovery capability of the system to a certain extent.

The invention discloses a multi-dimensional optical storage disc. According to the invention, multi-dimensional optical storage recording pits in different depths and angles are etched on a disc recording layer; and multi-wavelength read-write material is deposited on the surface of the disc sheet. The invention further provides a data read-out method based on the disc, which particularly comprises the following steps: the mixture lasers in different wavelengths can be focused on the disc recording pits in different depths and angles, so as to receive the reflected lights of each recording pit; the recording pit depth can be identified according to the phase position of the reflected light of each recording pit; the recording pit angle can be identified according to the polarization of the reflected light of each recording pit; the lasers are ordered according to the amplitude value of the reflected light of the lasers in different wavelengths in combination with the recording pits; and the disc storage data can be decoded according to the recording pit depth, the recording pit angle and the laser ordering result. According to the invention, the binary two-dimensional recording for traditional optical storage is switched to multi-nary multi-dimensional recording and more information can be stored in individual recording position, thereby greatly boosting the storage capacity of the disc.