Abstract: A device comprising a data transfer channel is configured to transfer data between multiple memory devices and a host device. The channel includes multiple decoders and a buffer coupled between the multiple memory devices and the multiple decoders. The buffer is configured to store code words received from the memory devices. Channel control logic is configured to determine availability of one or more of the multiple decoders and to distribute the code words to the one or more decoders based on decoder availability.

Abstract: A data reader may be configured at least with a magnetic stack positioned on an air bearing surface (ABS) and contacting a spin depolarizing layer that is a minority spin current carrier. The spin depolarizing layer can have a thickness and spin diffusion length corresponding to a net zero spin polarization at an interface of the magnetic stack and spin depolarizing layer.

Abstract: A data reader may be configured at least with detector and injector stacks that each has a common spin accumulation layer. The detector stack may positioned on an air bearing surface (ABS) while the injector stack is positioned distal the ABS. The injector stack can have a diffusive layer with a larger spin diffusion length than mean free path.

Abstract: A method or system for determining storage location of an isolation region based on a data region sizing specified by a host device. In one implementation, the isolation region comprises a set of storage locations required for isolation of or more data region of the storage device.

Abstract: Technologies are described herein for cancelling adjacent track interference in a storage device using an ITI predictor determined from predetermined data patterns in adjacent tracks. A first signal is read from a first portion of a data track, the first portion containing a first predetermined data pattern. Next, a value for an inter-track interference predictor associated with an adjacent track is determined based on the first signal, the first predetermined data pattern, and a second predetermined data pattern contained in a corresponding portion of the adjacent track. A second signal is read from a second portion of the data track, and inter-track interference from the adjacent track in the second signal is cancelled utilizing the value for the inter-track interference predictor.

Abstract: A quantum dot (QD) sensitized wide bandgap (WBG) semiconductor heterojunction photovoltaic (PV) device comprises an electron conductive layer; an active photovoltaic (PV) layer adjacent the electron conductive layer; a hole conductive layer adjacent the active PV layer; and an electrode layer adjacent the hole conductive layer. The active PV layer comprises a wide bandgap (WBG) semiconductor material with Eg?2.0 eV, in the form of a 2-dimensional matrix defining at least two open spaces, and a narrower bandgap semiconductor material with Eg<2.0 eV, in the form of quantum dots (QD's) filling each open space defined by the matrix of WBG semiconductor material and establishing a heterojunction therewith. The active PV layer is preferably fabricated by a co-sputter deposition process, and the QD's constitute from about 40 to about 90 vol. % of the active PV layer.

Abstract: Devices that include a near field transducer (NFT), the NFT including a peg having five exposed surfaces, the peg including a first material; an overlying structure; at least one intermixing layer, positioned between the peg and the overlying structure, the at least one intermixing layer positioned on at least one of the five surfaces of the peg, the intermixing layer including at least the first material and a second material.

Abstract: Technologies are described herein for implementing a universal modulation coding mechanism for a data channel. A user data sequence comprising a first number of bits is received. The user data sequence is encoded into a codeword sequence comprising a second number of bits utilizing a modulation encoder. The modulation encoder may encode the user data sequence based on a set of Markov state transition probabilities. The modulation encoder may implement a data de-compressor algorithm from a lossless data compression scheme. The codeword sequence is output to the data channel. The codeword sequence is subsequently received from the data channel, and the user data sequence is decoded from the codeword sequence utilizing a modulation decoder. The modulation decoder may decode the user data sequence based on the same set of Markov states transition probabilities. The modulation de-coder may implement the data compressor algorithm from the lossless data compression scheme.

Abstract: Systems and methods are disclosed for performing band rewrites on shingled storage media based on error scan counts. In one embodiment, a device may comprise a data storage medium including a first band and a processor. The first band may include a plurality of tracks storing data in a shingled manner where a first track at least partially overlaps a second track. The processor may be configured to receive a write command directed to the first band, increment a first rewrite count of the first band based on the write command, and when the first rewrite count exceeds a first rewrite threshold, perform a read-modify-write (RMW) operation for all of the first band. In some embodiments, a device may maintain write counts for sections of a band, and perform RMW operations on less than all of the band.

Abstract: Implementations described and claimed herein provide a stacked dual reader with a bottom sensor stack and a top sensor stack wherein the bottom sensor stack and the top sensor stack are mirrored along a down-track direction.

Abstract: A method is provided for characterizing the peg region of a near-field transducer incorporated into a write head of a HAMR magnetic recorder. The method includes providing excitation radiation to one or more near-field transducers. The near-field transducers include an enlarged disk region and a peg region at least partially in contact with the enlarged disk region. The method further includes filtering output radiation from the near-field transducers by passing a portion of photoluminescent radiation emitted by the near-field transducers in response to the excitation radiation and substantially blocking the excitation radiation transmitted by the near-field transducers. The method also includes detecting the portion of photoluminescent radiation and characterizing the peg region of at least one of the plurality of near-field transducers.

Abstract: An apparatus disclosed herein comprises a reader structure having a sensor stack and a bottom shield having a first end and a second end on opposite sides of the bottom shield in a cross-track direction, wherein the first end is formed by intersection of arcs.

Abstract: A writer core of a transducer is configured to interact with a magnetic recording medium and comprises an upper core and a lower core. At least one of the upper and lower cores comprises a return pole having a return shield. The apparatus also comprises a writer pole between the upper and lower cores, and a writer gap defined between the writer pole and the return shield. The apparatus further comprises a sensor element within one of the upper and lower cores that includes the writer gap. The sensor element has a temperature coefficient of resistance and is configured to sense for a change in temperature indicative of one or both of a change in spacing and contact between the transducer and the magnetic recording medium.

Abstract: Implementations described and claimed herein provide a dual reader wherein a bottom shield is attached to side shields.

Abstract: Provided herein, is an apparatus that includes a first weld attaching a first motor component and a second motor component, a second weld attaching the first motor component and the second motor component, and a plurality of spot welds along a joint between the first and second weld wherein the plurality of spot welds are configured to align the first motor component and the second motor component.

Abstract: A data reader may be configured at least with a magnetic stack that has a first magnetic layer separated from a second magnetic layer by a non-magnetic spacer layer. The first magnetic layer may have an areal extent on an air bearing surface (ABS) that differs from the second magnetic layer while the second magnetic layer can be configured with a first plurality of linear sidewalls that are each angled with respect to a second plurality of linear sidewalls of the first magnetic layer.

Abstract: Implementations disclosed herein provide for sequential readback of program data in from a cached data region of a storage device. In particular, the disclosed technology provides for storing a sequence of logical addresses associated with execution of a program, the sequence of logical addresses including at least two consecutive logical addresses associated with non-consecutive data blocks in a user data region; writing data corresponding to the at least two consecutive logical addresses to sequential data blocks in a cached data region; determining that a sequence of read commands from a host computer is associated with the data; and reading the data from the cached data region.

Abstract: A device and associated method of use can have at least an object with a work surface that contacts a lapping surface of a tool. Topography of the lapping surface can be mapped in-situ by an adjacent sensor array and the topography stored in a memory. The sensor array may be configured with a plurality of sensors positioned on opposite sides of the object.

Abstract: A light delivery system in a slider includes a channel waveguide, a mode-index refractive surface, a solid immersion mirror, and a near field transducer. The mode-index refractive surface shapes the angular spectrum of the light on its path to the solid immersion mirror in a manner so as to change the distribution of light energy focused on to the near field transducer.

Abstract: A data storage device may be generally directed to a data transducing head capable of magnetoresistive data reading. Such a data transducing head may be configured with at least a trilayer reader that contacts and is biased by a coupling feature. The coupling feature may have a smaller extent from an air bearing surface (ABS) than the trilayer reader.