Abstract: A data storage device includes one or more storage media that include multiple physical storage locations. The device also includes at least one cache memory having a logical space that includes a plurality of separately managed logical block address (LBA) ranges. Additionally, a controller is included in the device. The controller is configured to receive data extents addressed by a first LBA and a logical block count. The controller is also configured to identify at least one separately managed LBA range of the plurality of separately managed LBA ranges in the at least one cache memory based on LBAs associated with at least some of the received data extents. The controller stores the at least some of the received data extents in substantially monotonically increasing LBA order in at least one physical storage location, of the at least one cache memory, assigned to the identified at least one LBA range.

Abstract: Systems and methods are disclosed for performing a rewrite operation on recording bands of a data storage medium. In some embodiments, data may be read from a target band including a plurality of tracks, and modified. A portion less than all of the modified data is stored to a nonvolatile memory, and all of the modified data is written to the target band. In some embodiments, modified data corresponding to the first two tracks of the target band is stored to the nonvolatile memory, and modified data corresponding to the third track of the target band is written back to the first physical track. Each track may be written in order, ending with the modified data corresponding to the first two tracks. The result may be that data for each track in the band has shifted up two tracks, with data for the first two tracks moved to the end.

Abstract: A unified debug system with multiple user-configurable trace volumes is disclosed, including embodiments as a system, a method, and a computer-readable medium. Embodiments of the present invention provide more robust and flexible solutions for introducing configurable trace volumes to firmware, allowing a user to specify firmware system configurations for trace buffers, trace frames, and trace volumes, and offer other advantages over the prior art. One embodiment of the present invention pertains to a system that includes a firmware component comprising firmware, and a firmware interface communicatively connected to the firmware component. The firmware includes a plurality of trace volumes for storing a plurality of trace entries. The trace volumes are user-configurable through the firmware interface. The plurality of trace volumes includes first, second and third trace volumes. The first trace volume includes storing at least some of the trace entries to a trace buffer in a first volatile memory component.

Abstract: The disclosure is related to systems and methods of managing data storage in a memory device. In a particular embodiment, a method is disclosed that includes receiving, in a data storage device, at least one data packet that has a size that is different from an allocated storage capacity of at least one physical destination location on a data storage medium in the data storage device for the at least one data packet. The method also includes storing the at least one received data packet in a non-volatile cache memory prior to transferring the at least one received data packet to the at least one physical destination location.

Abstract: A method and device are provided that use a sequencer in the device to control interactions on an interface bus. The sequencer is programmed to interrupt a co-processor before execution of a command. Based on the interrupt signal and a stored error mode page, a false error condition is initiated by further programming the sequencer to operate abnormally. After recovery from the error condition, the sequencer is reprogrammed to operate normally.

Abstract: A disc drive includes a disc which is coupled to a spindle motor for rotation. A head in the disc drive is configured to read and write data upon the disc. The disc drive also includes a controller which is couplable to an SCSI interface, and adapted to store persistent reservation information on the disc. Methods are also provided by which SCSI compliant devices can respond to persistent reservations commands in accordance with the present invention.