Abstract: A digital sensor stream is received from a sensor. A domain transform is performed on the digital sensor stream to produce first and second substreams. The first substream is larger than the second substream. The first substream is stored in cold storage and the second substream is stored in a second storage that has faster access times than the cold storage. Deep machine learning is performed on the second substream, the results of which may be stored in the second storage.

Abstract: A data backup system can be implemented in a data storage enclosure that houses a backup controller. The backup controller may be connected to a storage media and a backup media via a switch. The backup media can be resassigned from an unavailable condition to an available condition by the backup controller in response to predicted degradation in the storage media. The backup media may be connected to a root complex of the backup controller via a backup partition and selection feature.

Abstract: A device including a near field transducer, the near field transducer including gold (Au), silver (Ag), copper (Cu), or aluminum (Al), and at least two other secondary atoms, the at least two other secondary atoms selected from: boron (B), bismuth (Bi), indium (In), sulfur (S), silicon (Si), tin (Sn), manganese (Mn), tellurium (Te), holmium (Ho), lutetium (Lu), praseodymium (Pr), scandium (Sc), uranium (U), barium (Ba), chlorine (Cl), cesium (Cs), dysprosium (Dy), europium (Eu), fluorine (F), germanium (Ge), hydrogen (H), iodine (I), rubidium (Rb), selenium (Se), terbium (Tb), nitrogen (N), oxygen (O), carbon (C), antimony (Sb), gadolinium (Gd), samarium (Sm), thallium (Tl), cadmium (Cd), neodymium (Nd), phosphorus (P), lead (Pb), hafnium (Hf), niobium (Nb), erbium (Er), zinc (Zn), magnesium (Mg), palladium (Pd), vanadium (V), zinc (Zn), chromium (Cr), iron (Fe), lithium (Li), nickel (Ni), platinum (Pt), sodium (Na), strontium (Sr), calcium (Ca), yttrium (Y), thorium (Th), beryllium (Be), thulium (Tm), erbium

Abstract: A data storage device includes a first data storage surface and a second data storage below the first data storage surface. The data storage device also includes a first micro-actuator coupled to a first arm that supports a first head over the first data storage surface, and a second micro-actuator coupled to a second arm that supports a second head over the second data storage surface. The data storage device further includes a coarse actuator, to which the first and second arms are coupled, that positions the first head and the second head between corresponding first and second tracks on the respective first and second data storage surfaces. Micro-actuator drive circuitry finely positions the first head over the first track and the second head over the second track by concurrently driving the first micro-actuator and the second micro-actuator in opposite directions.

Abstract: A recording head has a near-field transducer proximate a media-facing surface of the recording head. The near-field transducer extends a first distance away from the media-facing surface. A waveguide overlaps and delivers light to the near-field transducer. Two subwavelength focusing mirrors are at an end of the waveguide proximate the media-facing surface and extend a second distance away from the media-facing surface that is less than the first distance. The subwavelength mirrors are on opposite crosstrack sides of the near-field transducer and separated from each other by a crosstrack gap. The subwavelength focusing mirrors each include a first material at the media-facing surface; and a second material facing away from the media facing surface and in contact with the first material. The second material includes a plasmonic material, and the first material is more mechanically robust than the second material.

Abstract: A method of controlling a shape and size of at least one solder joint of a magnetic recording head that includes a trailing surface and a plurality of bond pads, wherein each bond pad comprises a base layer comprising a top surface and a top edge, the method including the steps of forming at least one solder dam by covering a portion of the top surface of the base layer of at least one of the bond pads with a coating layer that comprises a nonwettable, electrically conductive material positioned adjacent to the top edge of at least one of the bond pads, thereby defining a coated portion and an uncoated portion of the base layer, and applying solder material to the uncoated portion of the base layer adjacent to the solder dam so that the coating layer constrains movement of the solder material beyond the uncoated portion.

Abstract: Implementations disclosed herein provide a method of receiving a command from a host, the command providing a starting logical block address (LBA) and a length of the command, generating a multiplicity bit mask (MBM) for the command in response to receiving a command from a host, and storing the MBM to an MBM table in a row corresponding to a stream that the command is part of.

Abstract: A data storage device can have one or more timestamps to indicate chronological information associated with data stored in the data storage device. A controller may be connected to a timestamp module and a transducing head to allow a timestamp to be written to a magnetic data storage medium as directed by the timestamp module. The timestamp can consist of chronological information relating to user-generated data stored on the data storage medium.

Abstract: A disk drive, has a housing structure enclosing a disk and at least one recording head. The drive includes a plurality of capsules each comprising oxygen gas enclosed within a membrane. An oxygen diffusion rate of the membrane is selected to release oxygen into the housing structure at a rate that compensates for oxygen depletion within the housing structure.

Abstract: A head gimbal assembly for supporting a disk drive includes a slider, a load beam, a ring gimbal affixed to the load beam, a plurality of microactuators, and a flexure. The flexure includes a first end extending along the load beam through a center region of a longitudinal axis of the head gimbal assembly and second end that includes a plurality of bond pads electrically coupled to the slider. The flexure includes a plurality of support features. Each support feature of the plurality of support features spans a respective microactuator of the plurality of microactuators. Each support feature includes a support protrusion and a support base. Each support protrusion is coupled to the ring gimbal at a distal side of the respective microactuator and each support base is coupled to the flex circuit on a proximal side of the respective microactuator.

Abstract: An electronic memory module can be cooled by a cooling assembly that consists of at least a printed circuit board connected to at least one data storage component. The memory module may be housed within, and in physical contact with, a cooling frame that surrounds a periphery of the printed circuit board. The cooling frame can have a seating tab that is separated from the memory module, spans the memory module, and supports a heatsink in contact with the at least one data storage component.

Abstract: Method and apparatus for managing data in a non-volatile memory (NVM) of a storage device, such as a solid-state drive (SSD). A circuit measures programming and reading temperatures for a set of memory cells in the NVM. Error rates are determined for each of the reading operations carried out upon the data stored in the memory cells. A code rate for the NVM is adjusted to maintain a selected error rate for the memory cells. The code rate is adjusted in relation to a cross-temperature differential (CTD) value exceeding a selected threshold. The code rate can include an inner code rate as a ratio of user data bits to the total number of user data bits and error correction code (ECC) bits in each code word written to the NVM, and/or an outer code rate as a strength or size of a parity value used to protect multiple code words.

Abstract: An apparatus with a housing which stores a plurality of data storage magazines, where each data storage magazine includes a plurality of data storage devices. The housing includes a movable carriage, the movable carriage configured to selectively couple a set of data storage devices held by a particular data storage magazine to a host device.

Abstract: A virtual solid state storage system is provided with solid state storage error emulation. An exemplary apparatus comprises a virtual solid state storage device configured to emulate a solid state storage device. The virtual solid state storage device comprises an interface that communicates with a solid state storage controller; an address translation module that translates memory addresses from a solid state storage-based memory space to a second memory space of a second memory device; and a non-solid state storage memory controller that communicates with the second memory device; and an error module to emulate solid state storage errors for testing error handling functions of the solid state storage controller for predefined error types of the solid state storage memory device by: (i) flipping bits sent to and/or read from the second memory device; and/or (ii) changing a status response sent to the solid state storage controller.

Abstract: In one implementation, the disclosure provides a system including a detector configured to generate an output of a first log-likelihood ratio for each bit in an input data stream. The system also includes at least one look-up table providing a mapping of the first log-likelihood ratio to a second log-likelihood ratio. The mapping between the first log-likelihood ratio and the second log-likelihood ratio is non-linear. The system also includes a decoder configured to generate an output data stream using the second log-likelihood ratio to generate a value for each bit in the input data stream.

Abstract: Apparatus and method for managing metadata in a data storage device, such as a solid-state drive (SSD). In some embodiments, a non-volatile memory (NVM) includes a population of semiconductor memory dies. The dies are connected a number of parallel channels such that less than all of the semiconductor dies are connected to each channel. A controller circuit apportions the semiconductor memory dies into a plurality of die sets, with each die set configured to store user data blocks associated with a different user. The controller circuit subsequently rearranges the dies into a different arrangement of die sets so that at least one die is migrated from a first dies set to a second die set. A map manager circuit is configured to establish an array of pointers in a memory to identify contiguous portions of map metadtata that describe user data stored in the at least one migrated die.

Abstract: An apparatus includes a beam splitter and a plurality of mirrors. The beam splitter is positioned to receive a laser beam from a source and split the received laser beam to a first plurality of split laser beams and a second plurality of split laser beams. The plurality of mirrors is configured to direct the first plurality of split laser beams and further configured to direct the second plurality of split laser beams. The first plurality of split laser beams is directed by the plurality of mirrors is configured to cut a glass substrate. The second plurality of split laser beams is directed by the plurality of mirrors is configured to shape the glass substrate.

Abstract: A hard disk drive includes a first actuator and a second actuator. The first actuator is coupled to a first slider, which includes a first read transducer and a first write transducer. Both the first read transducer and the first write transducer are positioned away from a first longitudinal centerline of the first slider. The second actuator is coupled to a second slider, which includes a second read transducer and a second write transducer. Both the second read transducer and the second write transducer are positioned away from a second longitudinal centerline of the second slider.

Abstract: In electronic equipment device 1, a limitation level on reading an access level to selectively control the ability to read data from a USB flash drive (storage device) 2 is set to a setting section by an access level setting unit 3 in advance. The USB flash drive 2 ascertains the setting at the setting section 3 access level when the USB flash drive is connected to the electronic equipment 1 and limits reading data based on the determined setting device. If the limitation access level does not match with the condition for permitting data read-out as determined in USB flash drive 2 permit the reading of data, the USB flash drive 2 prohibits the electronic equipment 1 device from reading out data from a memory 24 of the USB flash drive by removing an application of power from the external device to the memory. By executing the processing for limiting data read-out at the side of the USB flash drive 2, unauthorized leakage of data can easily be prevented.