摘要:
A magnetic disk device according to an embodiment includes a disk including a plurality of tracks, a head configured to write and read data to and from the disk, and a controller configured to control an off-track of the head, which occurs when data is written to one track included in the plurality of tracks, within an allowable range of an amount of the off-track, which is set based on a count value of at least another track other than the one track.
摘要:
A digital information recording apparatus includes a recording circuit for recording information of a retention period included in the digital information and indicating a period for permitting the digital information to be held in the recording medium, starting with a time at which the digital information is recorded on the recording medium; and information of a playback permission period included in the digital information and indicating a period for permitting the digital information to be played back starting with a time at which the information is reproduced initially following recording of the digital information on the recording medium, permitting temporary recording or copying for the information permitted for “copy never” or “copy one generation.”
摘要:
A data storage device that includes a magnetic storage device and a non-magnetic nonvolatile storage device that measures a hit rate of read/write commands that result in accesses to the non-magnetic nonvolatile storage device, and adjusts a length of a time period, such as an idle time, based on the hit rate. The duration of the time period can be set each time the magnetic storage device is accessed. Upon expiration of the time period, if the magnetic storage device has not yet been accessed, the magnetic storage device is changed from a higher power consumption state to a lower power consumption state.
摘要:
A disk array unit connected to a host unit to give information thereto and receive information therefrom. The disk unit includes a plurality of disk units for storing information transmitted from the host unit and a management information recording device, formed by utilizing information storage areas in the disk units, for causing information relating to a logical unit for storing information from the host unit to correspond to information relating to the units. The invention further includes a control unit, when there is no access from the host unit to the logical unit for a predetermined time, for determining the disk units corresponding to the logical unit based on information recorded in the management information recording device and performing power saving of power supply for the disk units.
摘要:
An apparatus, system, and method for automatic unthreading and storage of storage media helps prevent damage to the media, which can otherwise occur when the storage media is left threaded in a storage media drive over an extended period or under adverse conditions. A sensing device may generate a signal or a detector may receive a signal indicating that a predetermined period of time has lapsed or that some other criteria has been met indicating that the storage media should be removed from the storage media drive. An unthread module in the storage media drive receives the signal and automatically unthreads and stores the storage media. A location on the storage media can be marked by the unthread module prior to unthreading such that the media may be returned to the location upon rethreading.
摘要:
A power-saving method adapted in a hard disk in a computer system having a CPU and a memory module is provided. The power-saving method comprises the following steps. A data-to-be-written is transferred from the memory module through the CPU to the hard disk filter. A determining module is provided to determine whether a data access frequency of the computer system exceeds a threshold value. When the data access frequency exceeds the threshold value, the determining module further determines whether a request-queuing time exceeds an idle-mode activation time. When the request-queuing time exceeds the idle-mode activation time interval, the data-to-be-written is stored in a temporary storage location by the hard disk filter. When a condition of the computer system is satisfied, the data-to-be-written is written to the hard disk to extend the duration of an idle-mode of the hard disk. A power-saving operating system is disclosed herein as well.
摘要:
According to one embodiment, an optical disk device includes a laser light source that emits laser light to be applied to an optical disk, an automatic power control circuit that controls a laser output of the laser light source, and a control processor that performs a setting data transmission process for the automatic power control circuit. The automatic power control circuit includes an operation setting module that makes an operation setting according to setting data obtained in the setting data transmission process of the control processor and a condition determining module that determines whether an operation setting permission condition containing the number of clocks during a transmission period of the setting data is adequate, and inhibits the operation setting of the operation setting module when the operation setting permission condition is not adequate.
摘要:
An image recording apparatus comprising: a receiving unit to receive a broadcast signal pertaining to a predetermined broadcast; a recording unit to record video data composed of sound data and image data, both based on a received broadcast signal; detection unit to detect an end of the predetermined broadcast based on the received broadcast signal; timer unit to time a detection time for which the detection means continues detecting of the end of the broadcast; judgment unit to judge whether the detection time timed by the timer unit has reached a predetermined elapsed time or not; and record erasing unit to stop recording the video data in the recording unit and to erase the video data having been recorded in the recording unit while the timer means has been timing the predetermined elapsed time, when the judgment means judges that the detection time has reached the predetermined elapsed time.
摘要:
It is an object of the present invention to provide an optical disc device that achieves more accurate time search. Thus, in a DVD playback device including time search function of performing playback from specified time, control is performed so that, when the specified time for the time search has been inputted, playback inside the device starts from a top of a VOBU including the specified time, and outputting a video and an audio starts from time when a playback frame agrees with a frame corresponding to the specified time.
摘要:
A data storage device and method of controlling the same. An automatic data update method of a data storage system, includes: counting a number of times a write mode is executed in tracks adjacent to each track of a storage medium; reading data stored in one of the tracks of the storage medium when the number of times the write mode is executed in any tracks adjacent to the one of the tracks exceeds a specified threshold value; and re-writing the read data to the one of the tracks.