Abstract: A data storage system includes a plurality of data storage drives, and a system controller coupled to each data storage drive of the plurality of data storage drives. The system controller is configured to store internal drive management data for each data storage drive of the plurality of data storage drives.

Abstract: Electrical power systems having variable-voltage DC busses and methods of controlling voltage settings of such busses. One electrical power system comprises: a variable-voltage DC bus; a number N?2 of electrical machines, each electrical machine connected to the variable-voltage DC bus via one of a corresponding number N of converters, each electrical machine and corresponding converter having an index n=(1, . . . , N); and a controller configured to select a voltage setting Vdc_bus for the variable-voltage DC bus and to provide control signals to the converters to control the voltage setting of the variable-voltage DC bus according to the selected voltage setting Vdc_bus. The controller configured to select a voltage setting Vdc_bus greater than or equal to a minimum voltage requirement Vdc_min for the bus. The controller is configured to determine the minimum voltage requirement Vdc_min using present operating speeds of each of the N electrical machines.

Abstract: A device includes a servo controller that includes or that is coupled to memory. The memory stores multiple distinct disturbance control schemes. The servo controller is configured to select and implement one of the disturbance control schemes in response to receiving a command from a host. The servo controller can be implemented on a system on a chip.

Abstract: This disclosure relates to a label printer with separated consumables, which includes a housing, a carbon ribbon cassette, a thermal transfer printing core, a printing head assembly and a synchronizing rotating shaft mechanism, a printing channel is arranged in the housing, and the printing head assembly is arranged on one side of the printing channel, a rubber roller assembly is provided at the other side of the printing channel, and the carbon ribbon in the carbon ribbon cassette passes through the printing channel.

Abstract: A recording head has a magnetic write transducer having a first crosstrack width operable to write a single track of data at a time to a magnetic disk. The recording head also has a magnetic erase transducer separate from the magnetic write transducer.

Abstract: A data storage device includes a disc, an actuator arm assembly, a servo clock, and a feedback and control system. The disc includes a top and bottom surfaces and a servo wedge. The servo wedge includes a top surface boundary and a bottom surface boundary. The actuator arm assembly supports a head pair configured for interaction with the top and bottom surfaces. The servo clock is configured to determine a top time at which the head pair encounters the top surface boundary and a bottom time at which the head pair encounters the bottom surface boundary during a disc read/write interaction. The feedback and control system is configured to determine an operation time difference; compare the operation time difference to a certification time difference correlating to a target vertical position of the actuator arm assembly relative to the disc; and move the actuator arm assembly to the target vertical position.

Abstract: A data storage device includes a stack of discs mounted on a spindle and a pivot block rotatably mounted around a shaft. The data storage device also includes an arm having first and second ends, with the first end supporting a head and the second end movably attached to the pivot block. The data storage device further includes an ultrasonic piezoelectric actuator that moves the arm along the pivot block to enable the head to interact with data storage surfaces of the discs.

Abstract: The technology disclosed herein pertains to a system and method for storing data on a storage media using both down-track super parity and cross-track super parity. Specifically, a method disclosed herein provides for generating down-track super parity values for data on the plurality of tracks and storing the down-track super parity values on a down-track super parity row of the storage block and generating cross-track super parity values for data on the plurality of rows and storing the cross-track super parity values on a cross-track upper parity track, wherein the cross-track super parity value for any given row is generated by inputting the data on the given row into an exclusive-OR (XOR) gate.

Abstract: The technology disclosed herein pertains to a system and method for managing off-track retry. An implementation of a method of determining offset direction for read off-track retry includes storing analog to digital converter (ADC) values of data read from a data sector by a data reader in a read channel buffer, calculating an indicator value of the distribution of the ADC values, determining an amount of offset for the data reader based on the indicator value, and moving the data reader by the amount of offset before performing a read retry operation.

Abstract: A hard disk drive includes a base deck that is coupled to a cover, a motor assembly that is coupled to the base deck, and magnetic recording media that is coupled to the motor assembly. The motor assembly includes a magnetic bearing with a horizontal magnetic bearing component and a vertical magnetic bearing component.

Abstract: A data storage system includes a logical space having logical block addresses (LBAs) divided into non-overlapping LBA ranges, and a physical space having pairs of physical bands. The system also includes a map in which first successive alternate LBAs of each different one of the non-overlapping LBA ranges are mapped to successive adjacent physical blocks of a first physical band of each different pair of the pairs of physical bands, and second successive alternate LBAs of each different one of the non-overlapping LBA ranges are mapped to successive adjacent physical blocks of a second physical band of each different pair of the pairs of physical bands. A controller employs the map to concurrently read data from a first physical block of the first physical band of one pair of physical bands and from a first physical block of the second physical band of the same pair of physical bands.

Abstract: A hard disk drive includes a base and a cover coupled together to create an enclosure and an actuator assembly positioned in the enclosure. The actuator assembly includes a body and arms extending from the body, and the arms comprise a reinforced aluminum alloy. Magnetic recording disks are respectively positioned between pairs of the arms.

Abstract: The present disclosure relates to a vehicle sunroof comprising an energized sunroof glass and to a vehicle. The energized sunroof glass comprises a rear glass and a front glass being slidable relative to the rear glass, wherein one of the rear glass and the front glass is electrically connected to a main wire harness of the sunroof, and wherein the vehicle sunroof further comprises an intermediate electrical connection structure configured to electrically connect the front glass to the rear glass when the front glass slides relative to the rear glass to a predetermined position. The vehicle sunroof saves the number of wire harnesses, has a simple structure and high integration, and is easy to control.

Abstract: The technology disclosed herein provides a method including determining an acceptable parameter rate for a dual reader storage device having dual readers, identifying one of the dual readers as the preferable reader, comparing an actual parameter rate of the storage device to the acceptable parameter rate of the storage device, and in response to determining that the actual parameter rate is below the acceptable parameter rate, operating the storage device using only the preferable reader. In one implementation, the parameter rate is bit-error rate (BER) of the dual readers.

Abstract: The present disclosure relates to a vehicle sunroof comprising an energized sunroof glass, and to a vehicle. The energized sunroof glass comprises a rear glass and a front glass (1) being slidable relative to the rear glass. The vehicle sunroof further comprises a movable wire harness (6). one end of the movable wire harness (6) is electrically connected to the front glass (1). and the other end of the movable wire harness (6) is electrically connected to a main wire harness of the vehicle sunroof. A hard guiding member (6d) is disposed inside the movable wire harness (6) and penetrates through at least part of the length of the movable wire harness (6) to guide the movable wire harness (6) to be rolled up or spread when the front glass (1) slides. The movable wire harness connection structure of the vehicle sunroof is small in size, and has fewer components but high integration. Further, the movable wire harness is not easy to get tangled and has a good self-guiding function during operation of the sunroof.

Abstract: Systems and methods are disclosed for data storage redeployment. For example, a controller of a data storage array can implement a process to determine when, or if, to redeploy a data storage device from a first data storage usage or tier having a first performance requirement to a second data storage usage or tier having a second performance requirement. In some embodiments, the first data storage tier performance requirement is for hot-data storage, and the second data storage tier performance requirement is for cold-data storage. Various criterion (e.g., a data storage device performance metric) threshold, such as a workload (e.g., LBAs written, LBAs read, or both) of the data storage device or bit error rate (BER), may be utilized in a redeployment determination.

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: Systems and methods are disclosed for detecting shingled overwrite errors. When a read error is encountered when reading from shingled recording tracks, a processor may determine whether the read error is an error caused by shingled overwriting. The processor may determine whether the read error is caused by shingled overwriting by determining read signal quality of one or more sectors preceding the read error, such as based on a bit error count or bit error ratio (BER), and comparing the read signal quality to a threshold value. The processor may determine that the read error is caused by shingled overwriting when the read signal quality value is lower than the threshold.

Abstract: Electrical power systems and methods of controlling electrical power systems are described. One such electrical power system comprises: a first ac bus and a first generator set configured to supply the first ac bus with ac electrical power; a second ac bus and a second generator set, configured to supply the second ac bus with ac electrical power; an interconnecting transformer connected between the first and second ac busses; a primary electrical load connected to both the first and second ac busses via a converter arrangement; an auxiliary load connected to the first ac bus; and a controller configured to control the first generator set according to a first droop control profile and to control the second generator set according to a second droop control profile, the first and second droop control profiles relating respective generator operating frequencies of the first and second generator sets to respective output powers of the first and second generator sets.