According to one embodiment, a magnetic disk device includes a disk having a first region in which a plurality of tracks is written and a second region that is positioned with a gap in a first direction of the radial direction of the first region, and in which a plurality of tracks is overwritten in the first direction, a head, and a controller that offsets part of a plurality of tracks which is overwritten in the second region in a second direction opposite the first direction to perform rewriting.

Methods and systems for managing data storage strategies for continuous video segment recordings on a video recording device are disclosed. The data storage strategies include the detection of various trigger events and ending events detected from the video recordings or measurements detected from sensor devices that are included in the video recording device.

An information processing apparatus, for recording data in a magnetic storage medium by a shingled magnetic recording, and a method of controlling this, when a rewrite of data stored in the magnetic storage medium is instructed, copy data of a zone in which rewrite target data is stored other than the rewrite target data into a vacant zone of the magnetic storage medium; store, to the vacant zone into which the data is copied, the rewrite target data, delete by overwriting an entirety of the zone in which the rewrite target data is stored with predetermined data, and register the overwritten zone as an unused area.

According to one embodiment, a magnetic disk device includes a disk having a first region in which a plurality of tracks is written and a second region that is positioned with a gap in a first direction of the radial direction of the first region, and in which a plurality of tracks is overwritten in the first direction, a head, and a controller that offsets part of a plurality of tracks which is overwritten in the second region in a second direction opposite the first direction to perform rewriting.

A computer-implemented method for indexing a tape for unmounting from a tape drive. The computer-implemented method includes: receiving a request to unmount the tape from the tape drive, wherein the tape includes an index partition and a data partition, determining that an update to the tape is not reflected in any data index written in the data partition, appending a new data index at the end of the last written data file in the data partition, wherein the new data index includes information associated with the update to the tape, unthreading the tape from the tape drive, wherein unthreading the tape from the tape drive is performed at low tension writing a metadata index to an ancillary storage device, wherein the metadata index includes information associated with the update to the tape.

Methods and systems for managing data storage strategies for continuous video segment recordings on a video recording device are disclosed. The data storage strategies include the detection of various trigger events and ending events detected from the video recordings or measurements detected from sensor devices that are included in the video recording device.

Disclosed herein are information capture systems and related methods. An information capture system includes a sensor secured to an object configured to be involved with a possible event. The sensor is configured to detect one or more stimuli that are associated with the possible event, and transmit a sensor signal indicating data corresponding to the one or more stimuli. The information capture system also includes a recording device configured to record information responsive to a triggering event determined from the sensor signal. A method includes analyzing sensor data from the sensor, determining, from the sensor data, that a triggering event occurred, and recording post-trigger information following the determination of the triggering event.

A vehicle camera and record system including a plurality of cameras located around a vehicle. The cameras are positioned such that at least a 360-degree planar view is provide surrounding the vehicle. A control unit is operably coupled to the cameras. The controller includes a computer readable storage device. The cameras will record the surrounding area of the vehicle. Media recorded by the cameras will be stored on the computer readable storage device such that the media can be accessed at a later time and date.

In an information recording device, when receiving an erase command by a receiver, a controller erases data of an erased area by overwriting data in an information area, to corrupt the data in the information area, using an erasing pattern. The erased area is specified by an erase start position and a size of the data to be erased on the optical disc. The data in the information area is arranged as partial data in a series of data arranged in a direction of internal parity of error correction so that correction is disabled in both of a correction processing by the internal parity of the error correction and a correction processing by external parity of the error correction when the data in the information area is overwritten using the erasing pattern.

A magnet structure for a magnetic data storage medium erasing apparatus includes a first half comprising a first plurality of magnets arranged symmetrically, having polarization direction of adjacent magnets in quadrature and at an oblique angle with respect to a plane of symmetry. A second half comprises a second plurality of magnets arranged symmetrically, having polarization direction of adjacent magnets in quadrature and at an oblique angle with respect to the plane of symmetry. The second half is arranged symmetrically with respect to the first half, wherein the first half and the second half are separated by an air gap disposed about the plane of symmetry.