Abstract: An apparatus includes an E-block. The E-block includes a body portion and one or more arms extending from the body portion. At least one of (1) the body portion, or (2) at least one of the one or more arms, comprises a magnesium-lithium alloy material. In embodiments, the body portion and the one or more arms are integrally formed.

Abstract: A single chip data storage device includes an array of storage drives each comprising a drive controller, a non-volatile storage medium, and a volatile memory. A storage controller is coupled to the array, the storage controller providing host access to the array. One or more compute cores are configured to locally perform at least one operation on data stored on one or both of the non-volatile storage medium and the volatile memory based on a computational storage function received from the host.

Abstract: Described are systems and methods during writing of data in hard disk drives in which adjacent track squeeze events are predicted by looking at the difference in position error signal (PES) between two tracks, one PES being a recorded value for data already written, and the other being a predicted value for an upcoming write. This approach recognizes that only using the PES of the track currently being written may not be a reliable indicator of sector failure, particularly in environments susceptible to vibration. This can reducing the unrecoverable error rate while maintaining in-system performance by stopping high-risk writes before they occur and by preventing unnecessary write fault flags.

Abstract: Disclosed are methods and assemblies used to optically communicate signals within a hard disk drive between controller electronics and recording heads. One or more transceivers in a fixed location can be used to communicate with one or more transceivers positioned on a moveable actuator and coupled to the recording heads. The use of linear motion actuators can help preserve line-of-sight optical communication between the transceivers.

Abstract: A magnetic recording head having a reader that includes a sensor stack with a free layer and a reference layer disposed above the free layer in the stripe-height direction. A method includes applying a current through the sensor stack while the magnetic recording head is positioned adjacent to a data track of a magnetic storage medium that is rotating, detecting a change in resistance in the sensor stack in response to a magnetic field of the magnetic storage medium; and processing the change in resistance in the sensor stack into data.

Abstract: Disclosed are fluorescent optical storage systems that include fluorescent optical media having one or more recordable layers, and a writer configured to direct an excitation beam on the fluorescent optical media. The excitation beam, which is capable of inducing a photochemical reaction in a selected layer of the one or more recordable layers, is generated from a Bessel beam. Such systems are capable of writing a sub-wavelength resolutions, which can be read using stimulated emission depletion. Light sheets may be used to selectively identify layers for writing.

Abstract: An apparatus includes a write head. A preamplifier is coupled to the write head. A controller is coupled to the preamplifier and configured to cause the preamplifier to apply an overshoot current to the write head for a predefined overshoot current duration, apply an undershoot current to the write head for a predefined undershoot current duration, and apply a steady-state current to the write head after the undershoot current duration, the steady-state current being greater than the undershoot current.

Abstract: Described are heat-assisted magnetic recording heads that include near-field transducers having a magnetic inlay incorporated into the emitter disk, for example to improve write field properties such as the write field angle (decrease) and/or write field strength (increase), and which can contribute to increased areal density capability. Aspects involve applying an inlay of a magnetic material to the emitter disk of a near-field transducer. The inlay may optionally extend into the sunken disk of the near-field transducer. The inlay thickness, length, shape, and recess from the media-facing surface may be selected or adjusted to achieve desired magnetic, optical, and/or thermal characteristics.

Abstract: A private set intersection protocol in which a third party may determine intersections of a first set of a first party and a second set of a second party. The third party may not obtain any information regarding the first set or the second set other than the intersection result. The protocol may be communicatively efficient and computationally efficient to allow for secure private set intersection to be performed.

Abstract: The present disclosure relates to magnetic recording disks having a magnetic recording layer that includes a plurality of three-dimensional segregant structures. Each three-dimensional segregant structure extends from a first radius of the recording disk to a second radius of the recording disk, and each three-dimensional segregant structure is made of a first segregant material. The magnetic recording layer also includes a plurality of magnetic grains between adjacent three-dimensional segregant structures, and a second segregant material between adjacent magnetic grains. The present disclosure also relates to corresponding methods of manufacturing such a magnetic recording layer.

Abstract: Provided are devices and methods for reading data from rotating ferroelectric data storage media using a reader that includes a channel region disposed between a source and a drain. The data bits, stored as dipoles in the ferroelectric media, induce a current flowing through the channel region of the reader from the source to the drain when a bias voltage is applied to the media. The bias voltage can be tuned for desired reader operation, such as enhancing the signal or operating within a linear response regime.

Abstract: Described are systems, devices and methods for staggered bits magnetic recording. A staggered bits track pattern is recorded on granular magnetic recording media, thereby mapping a data bit sequence onto adjacent tracks so that the bits in one track are staggered relative to the bits in the adjacent track. A read head having an effective cross-track width extending across the tracks is aligned to read a sequence of combined bit signals as the read head is advanced in the down-track direction. Each combined bit signal combines one bit from each adjacent track. A data channel coupled to the read head is used to disambiguate the sequence of combined bit signals, thereby reproducing the data bit sequence.

Abstract: Described are magnetic write heads for heat-assisted magnetic recording (HAMR) in which either or both of the heat sink disk or middle disk of the near field transducer are composed of magnetic materials. In addition, any diffusion barrier layers provided between the write pole and the heat sink or other components may include magnetic materials. Constructing write heads that include magnetic material containing components between the write pole and the near field transducer may result in increased areal density capability (ADC) due to lowering the magnetic field angle, decreasing the magnetic field rise time, and/or increasing the magnetic field strength.

Abstract: A microfluidic system includes a fluidic platform having a surface, a first liquid disposed onto the fluidic platform, and a droplet disposed onto the first liquid. The first liquid has a first temperature. The droplet has a second temperature higher than the first temperature so that the droplet is levitated above the first liquid by a cushion of vapor of the first liquid. In an embodiment, a device is configured to provide a magnetic field that has variable strength across the surface. A location of a magnetic droplet relative to the surface area is affected by the magnetic field. A method includes providing a fluidic platform, providing a magnetic field, introducing a first liquid onto the fluidic platform, introducing a first magnetic droplet onto the first liquid, and locally varying the magnetic field.

Abstract: A data storage device includes a data storage disk, an actuator arm, a load beam attached to the actuator arm, and a flexure attached to the load beam. The disk has a read/write surface defining an x-y plane, and the actuator arm is movable parallel to the x-y plane. The load beam supports a slider that carries a head that is configured to interact with the read/write surface. The load beam includes a first dimple that extends toward the read/write surface and has a flat base. The flexure is attached to the load beam at the flat base of the first dimple and is attached to the slider. The flexure is substantially parallel to the x-y plane between the flat base of the dimple and the slider. In another aspect, an actuator arm assembly includes a load beam with weld dimples.

Abstract: Laser diodes that include a mirror stack on the light-exit facet. The mirror stack has a reflectivity into the active region that is greater in air than when the laser diode is integrated into an apparatus. Related apparatuses, data storage devices, computing systems, and methods.

Abstract: A dealer receives a first addend function and a second addend function. A function client provides first validation parameters, each first validation parameter corresponding to a coefficient of the first addend function and a corresponding coefficient of the second addend function. The sum of the first addend function and the second addend function equals the polynomial function. The dealer generates a function share for each share party based on a sampling of first random polynomials and second random polynomials and generates second validation parameters for each share party based on the function shares. The dealer transmits the second validation parameters to the share parties and transmits each function share to a corresponding share party. Each function share is verifiable by the corresponding share party based on the second validation parameters and a signed concatenation of the first validation parameters.

Abstract: Disclosed are systems and methods for reducing the amount of time required before resuming full data operations after a hard disk drive has been spun down and/or placed in a standby mode. Such systems and methods may make use of thresholds to changes in environmental parameters, such as temperature, that may affect hard disk drive calibrations. Environmental parameter changes below a threshold may allow a subset of calibrations to be skipped or otherwise reduced to resume data operations. In addition or alternatively, a hard disk drive may be placed in a read-only mode prior to performing all calibrations needed to resume full write operations.

Abstract: The present disclosure relates to devices, circuits, and methods of determining power consumption in an electronic device (e.g., HDD) so that the determined power consumption can be used to determine a concentration of the gaseous oxidizing agent component in an interior gas space of the sealed enclosure and/or actively supply gaseous oxidizing agent component to the interior gas space of the electronic device if the determined power consumption is below a threshold value.

Abstract: Building DNA strands at a high rate that are suitable for data storage. Methods include using DNAzyme and utilizing libraries of pre-prepared oligos. A system for the DNA strand synthesis includes: a DNA symbol library comprising a number of single strand oligo symbols; a DNA linker library comprising a first set of single strand oligo linkers and a second set of single strand oligo linkers; and a DNAzyme library comprising a number of DNAzymes. An S1 end of a first DNAzyme is adapted to join the S1 end of a symbol and an S2 end of the first DNAzyme is adapted to join an S2 end of a first linker, and an S1 end of a second DNAzyme is adapted to join an S1 end of a second linker and an S2 end of the second DNAzyme is adapted to join an S2 end of the symbol.