Abstract: A method to provide data storage services using one or more holographic data storage media disposed in a holographic data storage system operated by a data storage services provider, wherein the holographic data storage system comprises a light source, a spatial light modulator, and a plurality of holographic data storage media, wherein the method receives information provided by the data storage services customer, allocates a first holographic data storage medium for exclusive storage of information provided by the data storage services customer, defines an outer storage portion of the first allocated holographic data storage medium, and stores the information as one or more holograms encoded in the outer storage portion of the first holographic data storage medium.

Abstract: A method to deduplicate data by receiving a data set, setting a data chunk size, selecting a first stage deduplication algorithm, and selecting a second stage deduplication algorithm, where the first stage deduplication algorithm differs from the second stage deduplication algorithm. The method selects a data chunk, where that data chunk comprises all or a portion of the data set, performs a first stage deduplication analysis of the data chunk using the first stage deduplication algorithm. If the first stage deduplication analysis indicates duplicate data, then the method performs a second state deduplication analysis of said data chunk using the second stage deduplication algorithm to verify the data as duplicate. Only if both data deduplication analysis indicate duplicate data the data chunk is replaced by a deduplication stub or reference to the identical data chunk which is already stored.

Abstract: A method to evaluate a holographic data storage medium, wherein the holographic data storage medium is evaluated by a manufacturer. In certain embodiments, the holographic data storage medium is evaluated by a customer prior to encoding customer information into the storage medium. In certain embodiments, the holographic data storage medium is evaluated by a customer after encoding customer information therein.

Abstract: A method of de-duplicating duplicate data in a data storage system that includes identifying a plurality of portions of data, comparing each portion of the data to identify duplicate data and identifying a link associated with each duplicate data, determining whether a Hamming link-separation-distance between the identified link and all other existing links is greater than twice the Hamming radius of an error correction code in the data storage system, and then replacing the duplicate data with the identified link.

Abstract: An implantable sound pickup system. The system comprises an intracochlear acoustic sensor implantable in a recipient's cochlea comprising: an elongate core conductor, and a piezoelectric element disposed on the surface of the core conductor configured to detect pressure waves in the perilymph of the cochlea when the acoustic sensor is at least partially implanted in the cochlea, and to produce electrical signals corresponding to the detected pressure waves.

Abstract: A method is disclosed to store information in multiple holographic data storage media. The method supplies a first holographic data storage medium, defines an inner storage portion of that first holographic data storage medium, and defines an outer storage portion of that first holographic data storage medium. The method further supplies a second holographic data storage medium, defines an inner storage portion of that second holographic data storage medium and defines an outer storage portion of that second holographic data storage medium. The method provides information, encodes a hologram comprising that information into the outer storage portion of the first holographic data storage medium, and encodes the information in the inner storage portion of the second holographic data storage medium.

Abstract: Data hologram recycling systems, methods and computer program products are configured to arrange data for storage in the intermediate data storage as data segments which are replicas of holographic storage segments for destaging to the holographic data storage, and to determine retrieval for recycling of the destaged holographic storage segments to which aggregated requests for deletion are directed. The retrieval determination may be based on a plurality of policies.

Abstract: A method is disclosed to store information in a holographic data storage medium. The method supplies a holographic data storage medium and provides information. The method defines an Active storage portion for the holographic data storage medium and establishes a threshold access interval. The method determines if the information was last accessed within the threshold access interval. If the information was last accessed within said threshold access interval, the method then stores that information as one or more holograms encoded in said Active storage portion of the holographic data storage medium.

Abstract: To improve reliability for multi-layer media, a data stream U is received for recording to a multi-layer rotating storage medium, the data stream U comprising a sequence of data bits. Each data bit U(J) is encoded into X representation bits. A first representation bit B(1,J) is recorded onto a first layer of the storage media, the second representation bit B(2,J) is recorded onto a second layer of the storage media, etc. When a request to read the recorded data U from the storage media is subsequently received, a plurality of the X representation bits are read back from the storage media and are decoded into the original data bit U(J). One embodiment employs a convolution encoding algorithm and PRML decoding algorithm. Another embodiment employs Reed Solomon encoding/decoding.

Abstract: Holographic recording drives encode data for recording into a holographic medium. The steps comprise run length limited encoding three bytes of data into 5×5 matrix information, the data subject to a 4-byte error correction code; and providing the 5×5 matrix information to a spatial light modulator (SLM), as a portion of a two-dimensional pixel matrix of the spatial light modulator, for recording into a holographic image on the holographic medium.

Abstract: A medium, system, and method are disclosed for a common data storage medium depression depth. An optical data storage medium comprises a plurality of spacer layers and data surfaces. A wavelength for a radiation beam such as the emission of a laser diode is identified. The index of refraction for a first spacer layer or substrate is also identified. The substrate is configured to transmit the radiation beam. The index of refraction of a second spacer layer that is configured to transmit the radiation beam is also identified. A depression depth for a plurality of pits for ROM media, or sector headers for recordable media, or grooves for recordable media on each data surface is substantially equal to the radiation beam wavelength divided by four times the average of the indexes of refraction of each spacer layer. In one embodiment, the average is an arithmetic mean of the indexes of refraction. In an alternate embodiment, the average is a harmonic mean of the indexes of refraction.

Abstract: An apparatus, system, and method are disclosed for implementing protected partitions in storage media. The apparatus includes a control module configured to communicate with a host and receive read/write commands for a storage device, and a protection module operating within the control module and configured to maintain a plurality of protection states for the partition and a plurality of allowable transitions between the protection states. The system includes the apparatus, a host device, and a storage device coupled with the host, the storage device including an enclosure having storage media and a control module. The method includes communicating with a host device and receiving read and write commands for a storage device having at least one partition, and maintaining a plurality of protection states for the partition and a plurality of allowable transitions between the protection states on a control module located within the storage device.

Abstract: Data for storage by holographic data storage is arranged in an intermediate data storage as data segments which are replicas of holographic storage segments. Files of data are aggregated into the data segments, and a destaging control determines the destaging of the data segments to the holographic data storage in accordance with a plurality of policies, such as whether a segment is full, a time threshold has been reached, or whether a threshold number of segments are “open”. The intermediate data storage may be arranged into a number of partitions at least equal to the number of sources having input to the data destaging system, the partitions comprising integral multiples of the data segments.

Abstract: An apparatus, system, and method are disclosed for setting protection states of protected partitions in storage media. The apparatus includes a control module configured to receive protection state transition commands from a host for a target partition, a check module configured to verify a protection state for the target partition, and a write module configured to perform the protection state transition according to a plurality of defined allowable state transitions. The system includes a host device, a storage device coupled with the host, the storage device comprising an enclosure having storage media and a control module, and the apparatus. The method includes receiving protection state transition commands from a host for a target partition, verifying a protection state for the target partition, and performing the protection state transition according to a plurality of defined allowable state transitions.

Abstract: A data storage cartridge comprises data storage media configured to store data for read and/or write access, wherein the data may be arranged in a plurality of partitions; and a plurality of cartridge memories. A control system, for example of a data storage drive, is configured to allocate at least portions of capacity of the data storage media to cartridge memories of the data storage cartridge; and to provide information defining the allocated portions of capacity to the cartridge memories. Each of the cartridge memories may have a separate user and thus provide access for that user to separate partitions.

Abstract: A data storage cartridge comprises data storage media configured to store data for read and/or write access, wherein the data may be arranged in a plurality of partitions; and a plurality of cartridge memories. A control system, for example of a data storage drive, is configured to allocate at least portions of capacity of the data storage media to cartridge memories of the data storage cartridge; and to provide information defining the allocated portions of capacity to the cartridge memories. Each of the cartridge memories may have a separate user and thus provide access for that user to separate partitions.

Abstract: A data storage cartridge comprises data storage media configured to store data for read and/or write access, wherein the data may be arranged in a plurality of partitions; and a plurality of cartridge memories. A control system, for example of a data storage drive, is configured to allocate at least portions of capacity of the data storage media to cartridge memories of the data storage cartridge; and to provide information defining the allocated portions of capacity to the cartridge memories. Each of the cartridge memories may have a separate user and thus provide access for that user to separate partitions.

Abstract: A data storage cartridge comprises data storage media configured to store data for read and/or write access, wherein the data may be arranged in a plurality of partitions; and a plurality of cartridge memories. A control system, for example of a data storage drive, is configured to allocate at least portions of capacity of the data storage media to cartridge memories of the data storage cartridge; and to provide information defining the allocated portions of capacity to the cartridge memories. Each of the cartridge memories may have a separate user and thus provide access for that user to separate partitions.

Abstract: Data for storage by holographic data storage is arranged in an intermediate data storage as data segments which are replicas of holographic storage segments. Files of data are aggregated into the data segments, and a destaging control determines the destaging of the data segments to the holographic data storage in accordance with a plurality of policies, such as whether a segment is full, a time threshold has been reached, or whether a threshold number of segments are “open”. The intermediate data storage may be arranged into a number of partitions at least equal to the number of sources having input to the data destaging system, the partitions comprising integral multiples of the data segments.

Abstract: Holographic recording drives encode data for recording into a holographic medium. The steps comprise run length limited encoding three bytes of data into 5×5 matrix information, the data subject to a 4-byte error correction code; and providing the 5×5 matrix information to a spatial light modulator (SLM), as a portion of a two-dimensional pixel matrix of the spatial light modulator, for recording into a holographic image on the holographic medium.