摘要:
In an optical data storage device for storing data on a removable optical disk in a continuous sequence of sectors or blocks, the input data buffer may be subject to under-run. An under-run detector is disclosed which is responsive to the buffered data comprising less than a sector of data for indicating an under-run, and a padding provider is disclosed which is responsive to the under-run indication for providing padding characters for formatting into sectors. The sectors may be provided with headers indicating the sectors as padding. A reading device for reading the data sectors and providing the data to a host detects padding and prevents the padding data from transmission to the host.
摘要:
Disclosed are an automated data storage library and a method for operating the library. The library includes two pickers arranged on a common guideway; a plurality of media storage slots arranged in a plurality of regions alongside the guideway; a plurality of read/write stations arranged in regions alongside the guideway. Commands are received for jobs to move media amongst the storage slots and the read/write stations, and a controller queues the received commands and allocates the queued commands to the pickers and in an order of jobs which will allow the pickers to independently access and move the media so as to avoid interference in the same region, or in regions which are behind the other picker. The media storage slots may be arranged in row sets and regions alongside the guideway, each row set including one or more storage slots and each region including one or more columns, with the regions narrower than the pickers. The controller queues the received commands and allocates the queued commands to the pickers and in an order of jobs so as to allow the pickers to independently access and move the media to avoid interference in the same row set in adjacent regions, in the same region, or in regions which are behind the other picker.
摘要:
The hit ratio in an automated storage library is maximized by tracking the frequency of usage of each file and rewriteable storage medium therein. For each file therein, the library counts the number of times such files are accessed. For each storage medium therein, the library counts the number of mounts thereof. Periodically, the usage statistics are reviewed to determine the most frequently used files and storage media in the library. The most frequently used files are then transferred to the most frequently used storage media, which then become still more frequently used. The less frequently used files are transferred to the less frequently used storage media, which become still less frequently used. By definition, the most frequently used storage media are the most likely to be mounted, thereby increasing the hit ratio.
摘要:
A method and system in a graphical user interface in a data processing system for associating and displaying a plurality of objects are described. A creation of a visually perceptible enclosure having a translucent surface is specified. A plurality of objects within the graphical user interface are specified. Each of the objects are associated with the visually perceptible enclosure. The enclosure is then created. The enclosure and each of its associated plurality of objects are displayed within the graphical user interface. Each of the objects are displayed within the enclosure so that they are partially visible through the translucent surface. The objects are inaccessible while they are displayed within the enclosure. Once the enclosure is removed, the objects are accessible. A code field may be associated with the enclosure. An entry of a valid code is required in order to remove the enclosure and permit access of each enclosed objects. If an invalid code is entered, the enclosure will continue to be displayed, and access of the enclosed objects will be prohibited.
摘要:
Various embodiments for processing data in a data deduplication system are provided. For data segments previously deduplicated by the data deduplication system, a supplemental hot-read link is established for those of the data segments determined to be read on at least one of a frequent and recently used basis. Other system and computer program product embodiments are disclosed and provide related advantages.
摘要:
The invention relates to the identification of molecules using electromagnetic write-heads and magneto-resistive sensors. In one embodiment, an electromagnetic write-head magnetically excites a molecule with an alternating magnetic field. A magneto-resistive sensor measures the resonant response of the magnetically excited molecule. A processor compares the resonant response to a table of known responses of different molecules to identify the chemical composition of the target molecule.
摘要:
A circuit for detecting antigens on biosample tracks comprising a processor, an electromagnetic write head for magnetizing nanoparticles attached to the antigens via antibodies in response to a write signal from the processor, and a first amplifier for supplying power to the write head. The circuit further comprises a magneto-resistive read sensor for detecting the magnetized nanoparticles upon receiving a read signal from the processor, and a second amplifier for supplying power to the read sensor. The write head and read sensor may be part of a head module in a magnetic tape drive. Nanoparticles of differing magnetic properties may be selectively paired with antibodies associated with different antigens to allow different antigens to be detected upon a single scan by the read-sensor.
摘要:
Re-arranging data handling in a computer-implemented system that comprises a plurality of existing physical entities. At least one reliability rating is assigned to each of various existing physical entities of the computer-implemented system; and in response to change. Reverse predictive failure analysis uses the assigned reliability ratings to determine cumulative reliability rating(s) for at least one arrangement of the system. Data handling is re-arranged with respect to at least a portion of the existing computer-implemented system to provide a designated cumulative reliability rating.
摘要:
A magnetic tape drive having a tape drive system for moving magnetic tape, tape read/write and servo system, tape cartridge load/unload systems, I/O communications, memory; and a control system, operates in three modes to conserve energy consumption. A first low power mode powers the I/O communications, the memory, and the control system. If a magnetic tape cartridge is in loaded position in the magnetic tape drive, the second low power mode powers the same as the first low power mode, and additionally powers the tape drive system to apply tension to a magnetic tape of the magnetic tape cartridge. In the first and the second low power modes, the control system operates the I/O communications, the memory and the control system to respond to and execute commands received at the I/O communications if the commands are executable without magnetic tape access. The third, full power mode, is entered if a command received at the I/O communications requires magnetic tape access.
摘要:
An apparatus for controlling an electric motor is provided. A plurality of switches is provided for controlling a direction of current through motor coils of the electric motor. A brushless motor control circuit is connected to each of the plurality of switches. Responsive to a request to adjust one of an angular velocity and an angular acceleration of the electric motor, the plurality of switches are activated to place the motor coils in a predetermined configuration to maximize torque or reduce a total back electromotive force (BEMF) from the motor coils.