Abstract: Systems and methods are disclosed for overlap detection using bitmask region trackers. In an embodiment, an apparatus may comprise a controller configured to maintain a count of writes associated with a selected area of a data storage medium, generate an overlap check bitmask, including an overlap check bit for each of multiple regions of the selected area and that represent an indication of a previous write associated with a respective region from the multiple regions, generate a write check bitmask based on a received write, the write check bitmask including a write check bit for each of the multiple regions of the selected area and representing which of the multiple regions are related to the received write, and increment the count of writes based on comparing the overlap check bitmask with the write check bitmask.

Abstract: A data storage device may generally be directed to a buffer that stores a plurality of command requests pending for a data storage medium and a processor that is configured to skip a first command request and execute a second command request in response to the second command request having an access latency within a first predetermined performance impact range and a power consumption within a second predetermined power savings range compared to the first command request.

Abstract: A recoverable error associated with a first disk drive sector is determined. Data of the first disk drive sector is duplicated to a mirrored sector in response to the recoverable error. The first disk drive sector continues to be used to store the data after the recoverable error is determined.

Abstract: A data storage device may generally be directed to a buffer that stores a plurality of command requests pending for a data storage medium and a processor that is configured to skip a first command request and execute a second command request in response to the second command request having an access latency within a first predetermined performance impact range and a power consumption within a second predetermined power savings range compared to the first command request.

Abstract: A recoverable error associated with a first disk drive sector is determined. Data of the first disk drive sector is duplicated to a mirrored sector in response to the recoverable error. The first disk drive sector continues to be used to store the data after the recoverable error is determined.

Abstract: An apparatus and associated method to begin performing a power reduction enablement sequence based on a first predetermined value of elapsed time after an execution of a data access command is completed. The power reduction enablement sequence is performed at an adaptively selected rate that is related to a second predetermined value of elapsed time after the execution that calls for a switch to a reduced power mode for the apparatus.

Abstract: The present disclosure relates to performing maintenance operations in a data system using configurable parameters. In one embodiment, a method in a data system is provided. The method includes receiving an indication of a data latency threshold and performing at least one maintenance operation in the data system based on the data latency threshold.

Abstract: The present disclosure relates to performing maintenance operations in a data system using configurable parameters. In one embodiment, a method in a data system is provided. The method includes receiving an indication of a data latency threshold and performing at least one maintenance operation in the data system based on the data latency threshold.

Abstract: An apparatus and associated method to begin performing a power reduction enablement sequence based on a first predetermined value of elapsed time after an execution of a data access command is completed. The power reduction enablement sequence is performed at an adaptively selected rate that is related to a second predetermined value of elapsed time after the execution that calls for a switch to a reduced power mode for the apparatus.

Abstract: A method for placing a predetermined number of notch filters in a disc drive servo control system to attenuate noise frequencies, in order of decreasing resonance magnitudes, is disclosed. The method involves calculating an open loop response for a response spectrum of the drive, calculating a notch filter for any noise frequency that exceeds a threshold, mathematically applying the notch filter into the servo control system, recalculating the open loop response and applying another filter for a noise frequency that exceeds the threshold and repeating until no noise frequencies exceed the gain threshold; selecting another frequency range and repeating the same process until a predetermined number of notch filters has been placed in the servo control system.

Abstract: A method for placing a predetermined number of notch filters in a disc drive servo control system to attenuate noise frequencies, in order of decreasing resonance magnitudes, is disclosed. The method involves calculating an open loop response for a response spectrum of the drive, calculating a notch filter for any noise frequency that exceeds a threshold, mathematically applying the notch filter into the servo control system, recalculating the open loop response and applying another filter for a noise frequency that exceeds the threshold and repeating until no noise frequencies exceed the gain threshold; selecting another frequency range and repeating the same process until a predetermined number of notch filters has been placed in the servo control system.

Abstract: A method for placing a predetermined number of notch filters in a disc drive servo control system to attenuate noise frequencies, in order of decreasing resonance magnitudes, is disclosed. The method involves calculating an open loop response for a response spectrum of the drive, calculating a notch filter for any noise frequency that exceeds a threshold, mathematically applying the notch filter into the servo control system, recalculating the open loop response and applying another filter for a noise frequency that exceeds the threshold and repeating until no noise frequencies exceed the gain threshold; selecting another frequency range and repeating the same process until a predetermined number of notch filters has been placed in the servo control system.