According to one embodiment, a magnetic disk apparatus is provided with a magnetic disk, a buffer memory, and a control circuit. The magnetic disk has plural bands, each of which is a storage area in which data is written by the method of SMR. The control circuit receives a read request from outside. If the data requested to be read is first data of an update target stored in a first band among plural bands, the control circuit reads the first data from the first band, stores the first data in a buffer memory, and updates the first data in the buffer memory. Then, the control circuit transmits the first data in the buffer memory to the outside and writes the first data in the buffer memory to one of the plural bands.

According to one embodiment, a magnetic disk device includes a first magnetic disk comprising a first recording surface accessed by using a first actuator system and second magnetic disk comprising a second recording surface accessed by using a second actuator system. The first recording surface includes a first area to which a logical address is mapped and a cache area. The second recording surface includes a second area to which a logical address is mapped and a cache area. When receiving first data whose final write destination is the first recording surface from a host, the controller writes the first data to a buffer memory. When the first event occurs, after the first data has been written to the buffer memory and before the first data has been written to the final write destination, the controller writes the first data in the buffer memory to the second area.

A system and method for improving the management of data input and output (I/O) operations for Shingled Magnetic Recording (SMR) devices in a network storage system is disclosed. The storage system includes a storage controller that receives a series of write requests for data blocks to be written to non-sequential addresses within a pool of SMR devices. The storage controller writes the data blocks from the series of write requests to a corresponding sequence of data clusters allocated within a first data cache of the storage controller for a thinly provisioned volume of the pool of SMR devices. Upon determining that a current utilization of the first data cache's data storage capacity exceeds a threshold, the sequence of data clusters including the data blocks from the first data cache are transferred to sequential physical addresses within the SMR devices.

Methods and systems for recording streaming audio and video by directing an incoming audio-visual stream to a discrete memory region serving as a virtual display. The virtual display is configured with a section visible to the viewer and a section invisible to the viewer, wherein a streaming video is hidden from the user's display under all conditions. The user's browser is pre-loaded with hooks to redirect the video portion of the stream to the invisible section of the virtual memory wherein a video capture tool specifically designed to interact with the hooks can now recognize each function call and intercept each frame as it is rendered in the GPU. Concurrently, the audio portion of the stream is remapped using an audio indexing application. The GPU framebuffers and audio sinks are multiplexed together and saved to disk. The file is immediately accessible for playback or copying.

A buffer device stores, in relation to a first area and a second area, which are partial areas respectively located on an identical line of an encoding target frame, and a third area, which is a partial area on the line below the identical line, reference image data for each search range of a reference frame that is referred to during motion search processing executed in order of the first area, the second area, and the third area, the buffer device including a memory for storing the reference image data, and a buffer control unit which, when the motion search processing is executed on the second area, executes control so that among the reference image data included in a first search range that is referred to during the motion search processing of the first area, the reference image data included in a third search range that is referred to during the motion search processing of the third area are left in the memory without being deleted.

A buffer device stores, in relation to a first area and a second area, which are partial areas respectively located on an identical line of an encoding target frame, and a third area, which is a partial area on the line below the identical line, reference image data for each search range of a reference frame that is referred to during motion search processing executed in order of the first area, the second area, and the third area, the buffer device including a memory for storing the reference image data, and a buffer control unit which, when the motion search processing is executed on the second area, executes control so that among the reference image data included in a first search range that is referred to during the motion search processing of the first area, the reference image data included in a third search range that is referred to during the motion search processing of the third area are left in the memory without being deleted.

An error recovery process provides for identifying a set of failed data blocks read from a storage medium during execution of a read command, populating sample buffers in a read channel with data of a first subset of the set of failed data blocks, and initiating an error recovery process on the data in the sample buffers. Responsive to successful recovery of one or more data blocks in the first subset, recovered data is released from the sample buffers and sample buffers locations previously-storing the recovered data are repopulated with data of a second subset of the set of failed data blocks. The error recovery process is then initiated on the data of the second subset of the failed data blocks while the error recovery process is ongoing with respect to data of the first subset of failed data blocks remaining in the sample buffers.

Methods and systems for recording streaming audio and video by directing an incoming audio-visual stream to a discrete memory region serving as a virtual display. The virtual display is configured with a section visible to the viewer and a section invisible to the viewer, wherein a streaming video is hidden from the user's display under all conditions. The user's browser is pre-loaded with hooks to redirect the video portion of the stream to the invisible section of the virtual memory wherein a video capture tool specifically designed to interact with the hooks can now recognize each function call and intercept each frame as it is rendered in the GPU. Concurrently, the audio portion of the stream is remapped using an audio indexing application. The GPU framebuffers and audio sinks are multiplexed together and saved to disk. The file is immediately accessible for playback or copying.

Methods and systems for recording streaming audio and video by directing an incoming audio-visual stream to a discrete memory region serving as a virtual display. The virtual display is configured with a section visible to the viewer and a section invisible to the viewer, wherein a streaming video is hidden from the user's display under all conditions. The user's browser is pre-loaded with hooks to redirect the video portion of the stream to the invisible section of the virtual memory wherein a video capture tool specifically designed to interact with the hooks can now recognize each function call and intercept each frame as it is rendered in the GPU. Concurrently, the audio portion of the stream is remapped using an audio indexing application. The GPU framebuffers and audio sinks are multiplexed together and saved to disk. The file is immediately accessible for playback or copying.

An optical disc drive device includes a spindle motor that rotates an optical disc, an OPU, a first controller that causes the spindle motor and the OPU to read recorded data from the rotating optical disc, and an transmitter that transmits the read recorded data to a signal processing device disposed external to the optical disc drive device. The recorded data transmitted by transmitter is stored in a buffer provided in the signal processing device. The first controller decreases the rotational speed of the optical disc based on free space information indicating the free space of the buffer.