Abstract: An atomic write descriptor associated with stripe buffer list metadata.

Abstract: Input data is encoded using a look-up table and then transmitted over a transmission medium as a series of pulses. The look-up table includes data elements. The length of each pulse is calibrated to correspond to one of the data elements in the look-up table. Upon receipt at another end of the transmission medium, the data is decoded using a look-up table. This decoding includes measuring the length of each received pulse to match the measured length to a corresponding one of data elements in the look-up table.

Abstract: A method for tracking and reporting material movements and responding to material movements. Tracked-components are assigned a component identifier which can be associated with a location. The identifier is associated with a first location, and in response to a movement trigger, the location associated with the identifier is updated to a second location. A component can be comprised of multiple sub-components, each of which itself is a tracked component. When the location of the component is updated, the location of each sub-component is similarly updated. Each update of the location of a component can trigger reports or other actions within the system.

Abstract: One implementation of the disclosed technology involves detecting a transition in a signal received via one of a first indexed input and a second indexed input. The transition defines a first symbol having a symbol value. This implementation further involves outputting the first symbol in response to detection of a transition. The symbol value of the first symbol is designated by the index of the indexed input upon which the transition is detected.

Abstract: Physical subsector error marking allows for selectively marking subsectors of a physical sector of a storage medium as unreadable. The error marking may include a bad sector mask to indicate that the subsector is unreadable combined with an error signature to confirm that the bad sector mask was set intentionally. The remaining readable subsectors of the physical sector may be returned to the host.

Abstract: Implementations disclosed herein provide a transducer head including a writer feature extending to a transducer head surface, the transducer head surface being configured to face a storage medium surface; and a bumper structure configured on the transducer head surface, the bumper structure configured to be proximal to the writer feature and to protrude beyond the writer feature in response to energy.

Abstract: A magnetic data storage medium may include a substrate, a magnetic recording layer, a protective carbon overcoat, and a monolayer covalently bound to carbon atoms adjacent a surface of the protective carbon overcoat. According to this aspect of the disclosure, the monolayer comprises at least one of hydrogen, fluorine, nitrogen, oxygen, and a fluoro-organic molecule. In some embodiments, a surface of a read and recording head may also include a monolayer covalently bound to carbon atoms of a protective carbon overcoat.

Abstract: Apparatus and method for detecting and compensating for lubrication disturbance (lube disturb) events on a rotatable data recording medium. In some embodiments, a lube disturb event is detected responsive to displacement of a data transducer away from a first memory location on a rotating data recording medium during a write operation to write data thereto. The lube disturb event arises responsive to a transfer of accumulated contamination from a data transducer to a lubrication layer on the rotating data recording medium and a smearing of the transferred accumulated contamination along the first memory location. The write data are stored to a different, second memory location instead of to the first memory location responsive to the detected lube disturb event.

Abstract: Various embodiments can be generally directed to a magnetoresistive stack with a first stripe height and a biasing magnet positioned adjacent the magnetoresistive stack. The biasing magnet can have a second stripe height that is less than the first stripe height. The first and second stripe heights may correspond to a minimum signal to noise ratio in the magnetoresistive stack.

Abstract: Method and apparatus for managing data in a memory. In accordance with some embodiments, a first data object and an associated first ECC data set are generated and stored in a non-volatile (NV) main memory responsive to a first set of data blocks having a selected logical address. A second data object and an associated second ECC data set are generated responsive to receipt of a second set of data blocks having the selected logical address. The second data object and the second ECC data set are subsequently stored in the in the NV main memory responsive to a mismatch between the first ECC data set and the second ECC data set.

Abstract: Digital rights management (DRM) can be effectively implemented through use of an anchor point and binding records within a user's anchor point domain. Assigning security levels to various components within an anchor point based DRM system and evaluating them against a security criterion provides additional protection against authorized access of the digital content. The content provider may specify the security criterion (e.g., a security level threshold), and the ability to use the digital content is denied or granted based on the ability of components to satisfy this criterion. For example, the ability to use a digital property instance is granted to a content handler that satisfies the security criterion and denied to a content handle that does not satisfy the security criterion.

Abstract: Flux-closed spin-transfer torque memory having a specular insulative spacer is disclosed. A flux-closed spin-transfer torque memory unit includes a multilayer free magnetic element including a first free magnetic layer anti-ferromagnetically coupled to a second free magnetic layer through an electrically insulating and electronically reflective layer. An electrically insulating and non-magnetic tunneling barrier layer separates the free magnetic element from a reference magnetic layer.

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: Certain exemplary aspects of the present disclosure are directed towards an apparatus in which a base deck and a base deck cover interface with one another to provide a permeability path. The base deck includes an outer region, and the base deck cover includes a lip that interfaces with the outer region of the base deck to provide the permeability path. The permeability is further defined by at least three interleaved sidewalls of the base deck and base deck cover that define two segments of the permeability path. The permeability path is filled with a polymer material that creates a seal between the base deck and base deck cover.

Abstract: An apparatus and associated method are generally described as a thin film exhibiting a tuned anisotropy and magnetic moment. Various embodiments may form a magnetic layer that is tuned to a predetermined anisotropy and magnetic moment through deposition of a material on a substrate cooled to a predetermined substrate temperature.

Abstract: An apparatus includes a first circuit and a second circuit. The first circuit may be configured to generate a reduced representation of an input sequence of characters by replacing a repetition of a sequence of one or more characters by a code representing the repetition of the sequence of one or more characters. The second circuit may be configured to generate a compressed representation of the input sequence of characters in response to the reduced representation of the input sequence of characters. The second circuit is generally configured to recognize the code representing the repetition of the sequence of one or more characters and take into account the repetition of the sequence of one or more characters during a compression operation.

Abstract: Provided herein is an apparatus, including a photon emitting means for emitting photons onto a surface of an article, a photon detecting means for detecting photons scattered from features in the surface of the article; and a mapping means for mapping the features in the surface of the article, wherein the apparatus is configured to process more than one article every 100 seconds.

Abstract: Systems and methods are disclosed for isolated bands of fractional tracks in data storage devices, particularly devices employing shingled magnetic recording. In one embodiment, a device may comprise a data storage medium including a first data storage area including tracks overlapped in a shingled manner and having a first circumferential portion of a track to store data, a second data storage area, and a guard area disposed between the first data storage area and the second data storage area, the guard area including a second circumferential portion of the track as a partial guard track. In some embodiments, the guard area may include at least one sector in the first circumferential portion of the track, such that at least one sector of the guard area is interposed between data storage sectors of the first data storage area.

Abstract: Provided herein is an apparatus, including a clamping means for clamping at least one disk onto a hub at a mounting point on the hub for the at least one disk, wherein the clamping means is configured to sit wholly above the at least one disk; a seat in an outer perimeter of the hub configured to receive the clamping means; and a locking means for locking the clamping means onto the hub.

Abstract: An apparatus and associated method for reorienting the magnetic anisotropy of magnetic recording discs. A pallet that is moveable along a path of travel is also sized to selectively hold either a first magnetic recording disc of a first size or a second magnetic recording disc of a second size different than the first size. A first processing chamber in the path of travel is adapted for forming a soft underlayer (SUL) of magnetic material with non-radially oriented magnetic anisotropy on a substrate corresponding to one of the first and second magnetic recording discs. A second processing chamber in the path of travel downstream of the first processing chamber is adapted for selectively re-orienting the SUL's magnetic anisotropy via a magnetic source emanating a first magnetic field if the substrate corresponds to the first magnetic recording disc and emanating a different second magnetic field if the substrate corresponds to the second magnetic recording disc.