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.

Abstract: A system for use in an aerospace environment includes an array of storage drives each comprising a non-radiation-hardened drive controller, a non-radiation-hardened, non-volatile, storage medium, and a non-radiation-hardened volatile memory. The system includes a radiation-tolerant storage controller coupled to the array. The storage controller provides failure-resistant data redundancy among the storage drives of the array. The system includes a bus host that accesses the array via the storage controller. The storage controller implements security logic and a root-of-trust that provides to the bus host verification of authenticity of the radiation tolerant storage controller and the storage drives.

Abstract: Disclosed are sealed enclosure HAMR hard drives, and methods for use therewith, that reduce the rate of depletion of gaseous Oxygen within the sealed HAMR drive enclosure, thereby leaving an amount of Oxygen available for mitigation of the effects of carbonaceous residue formation, thus extending the useful life of the HAMR drive. In sealed enclosure HAMR hard drives that include a component having a NdFeB alloy magnet, the sealed enclosure is filled with a gas mixture that includes primarily Helium along with a sufficient amount of Oxygen to mitigate carbonaceous residue formation during the lifetime of the drive and a sufficient amount of Nitrogen to reduce the rate of Oxygen depletion due to oxidation of the NdFeB magnet.

Abstract: A recording head has a write pole with a pole tip extending to a media-facing surface of the recording head. A peg coupler is located on a substrate-parallel surface of the pole tip and extending to the media facing surface. A near-field transducer is proximate the media-facing surface and includes a plate-like, enlarged part with a peg extending from the enlarged part towards the media-facing surface. The peg separated is separated in a downtrack direction from the peg coupler by a coupling gap. The enlarged part has a coupling surface facing the write pole, and includes an inlay on or near the coupling surface and spaced away from the peg. The inlay extends at least partially through a thickness of the enlarged part in the downtrack direction and extends between opposing crosstrack edges of the enlarged part.

Abstract: The present disclosure relates to target plates for sputtering a material to form a layer of material on a substrate. In some embodiments, a target plate is made up of two or more discrete sections and/or has at least one recess to help reduce or avoid hotspots created by a rotating plasma ring created during sputtering. The present disclosure also relates to methods of actively heating and/or cooling different regions of a heat-sink backing plate while sputtering material to reduce or avoid hotspots created by a rotating plasma ring created during sputtering.

Abstract: A failure of a head is detected, the head reading from and writing to an affected surface of a disk of a disk drive. The failure prevents the head from writing to the affected surface but does not prevent the head from reading from the affected surface. In response to detecting the failure, a remediation is performed. The remediation involves determining spare capacity blocks on other surfaces of the disk drive different than the affected surface, and copying data from the affected surface to the spare capacity blocks via an internal copy function within the disk drive. The spare capacity blocks in place of the affected surface for data storage and retrieval subsequent to the failure.

Abstract: Described are systems and methods for tri-level recording of bits on granular magnetic media, for example using a magnetic writer of a hard disk drive. Tri-level recording of bits involves recording magnetic states that can be read as three distinct levels by a magnetic reader. Tri-level recording within a single recording layer of the granular magnetic storage media can be accomplished by recording bits in a neutral bit state as well as in an up bit state and a down bit state. Neutral bits are recorded by doubling the write frequency so that the write field is reversed over the span of writing a single bit. The resulting neutral bit includes grains whose magnetic states are roughly evenly mixed between up states and down states.

Abstract: Disclosed are methods and configurations for monitoring reflections in heat-assisted magnetic recording (HAMR) heads that may lead to laser instability and power variation. HAMR heads direct light emitted by a laser toward a near field transducer (NFT) for the production of plasmons that assist in data recording. A certain amount of the laser light may be reflected at or near the NFT back toward the laser, and this reflected light can cause laser instabilities over time. As a screening measure during manufacturing or assembly, or as a laser health monitoring measure during drive operation, a back reflection monitor is used to detect the intensity of a portion of the reflected light. Back reflection monitoring capability may be provided by a bolometer integrated into HAMR recording head assemblies, and optionally along with optical components and electrical circuitry that provides laser light transmission monitoring capability.

Abstract: Described are data processing and storage systems, and methods for use therewith, that make use of a host memory buffer (HMB) partition of one or more host devices to directly cache at-risk data from one or more HMB-aware hard disk drives (HDDs) via remote direct memory access over nonvolatile memory express interfaces and protocols.

Abstract: An apparatus includes a data storage disc having a read/write surface, and an arm extending along an arm axis and having a head end that supports a head that is configured to interact with the read/write surface. The apparatus also includes a rail extending along a rail axis that is normal to the arm axis, and a carriage coupled to the arm and movably coupled to the rail. The apparatus further includes a latch mechanism configured to releasably hold the carriage to the rail at a fixed position.

Abstract: Laser diode having a p-metal electrical contact that includes a metal adhesion layer disposed on the p-type region of the semiconductor laser structure, and a metal bi-layer disposed on the metal adhesion layer. The metal bi-layer includes a first metal layer disposed on the metal, adhesion layer, and a second metal layer disposed on the first metal layer. A metal conductive layer is disposed on the second metal layer. Related apparatuses, data storage devices, computing systems, and methods.

Abstract: An electronics enclosure includes a fixed part that attaches to a rack and a sliding part that houses equipment. The sliding part is slidably disposed in the fixed part. The fixed part has a floor that is adjacent to a bottom of the sliding part. A cable harness has a first end attached to a back end of the sliding part and a second end attached to a back end of the fixed part. The cable harness includes a cable extending from the first to second ends of the cable harness. The cable harness includes at least one puck that is fastened to the cable and allows the cable to bend at the puck between the first and second ends along a bendable axis. The puck is slidable along the floor of the fixed part when the sliding part is transitioned between a closed state and an opened state.

Abstract: An apparatus includes a linear actuator assembly with a rail, a carriage, and a piezoelectric actuator. The carriage is coupled to the rail such that the carriage is movable with respect to the rail, and the piezoelectric actuator is configured and arranged to cause the carriage to move linearly between ends of the rail.

Abstract: Described is a recording head that includes a notched write pole to enhance perpendicularity of the write pole field. The write pole notch is formed at the media-facing surface and the leading edge of the write pole. The write pole notch is filled with a non-magnetic metal. The recording head further includes a near field transducer located in front of the leading edge of the write pole and having a portion extending to the media-facing surface that is spaced apart from the notch, thereby forming a gap between the near field transducer and the notch.

Abstract: A digital microfluidic (DMF) system based on an electrowetting-on-dielectric mechanism includes a substrate, and at least one dielectric layer comprising diamond-like carbon over the substrate. The DMF system also includes a plurality of electrodes connected to the dielectric layer. A voltage source is selectively couplable to different electrodes of the plurality of electrodes.

Abstract: Single-transverse-mode laser diodes that include a bowtie-shaped ridge waveguide. Related apparatuses, data storage devices, computing systems, and methods.

Abstract: A method of manufacturing a synthetic nanopore device for DNA sequencing disclosed herein includes providing a base template, forming a guiding layer on top of the base template, and forming a photoresist layer on top of the guiding layer. The photoresist layer is patterned, and the guiding layer is etched for form a guiding pattern. The photoresist layer is removed to form a guiding template and a self-assembled monolayer is deposited on at least a portion of the guiding template to form a patterned template. The patterned template is exposed to one or more etch processes to form a nanoimprint lithography template. A membrane is imprinted with the nanoimprint lithography template to form an array of nanopores in the membrane.