Abstract:
In a data recording apparatus, a monitoring unit detects a VLU including an MRB that manages an area that has not been accessed for a specified time period based on a current time, a time management table, and a parameter table. From MRBs of the detected VLU, the monitoring unit selects a plurality of MRBs with an unaccessed time period equal to or more than the specified time period and equal to or less than a total time. The monitoring unit performs synchronization process for data in a primary storage managed by the selected MRBs at a time. During the synchronization process, a correction value is adjusted when there is a data conflict with another device.
Abstract:
A storage system includes an interface processor for receiving a read or write request, a primary storage, a secondary storage, a storage control device and a temporary storage area for temporarily storing data for the primary storage in case that an access to the primary storage fails. The storage control device includes a controller for, in case that the access to the primary storage fails when the read request is received by the interface processor, determining whether the read requested data is stored on the temporary storage area, controlling to read the read requested data from the temporary storage area when the read requested data is stored on the temporary storage area, and controlling to read the read requested data from the secondary storage when the requested data is not stored on the temporary storage area.
Abstract:
A tape library control apparatus includes a storage for storing configuration information, a diagnostic evaluator, and a command controller. A tape library apparatus includes may include a plurality of tape drives and a plurality of magnetic tapes which includes specific magnetic tapes assigned for respective pieces of data specified by each data request issued by a host computer and a common magnetic tape provided for writing the respective pieces of the data. The diagnostic evaluator determines a use mode of the tape library apparatus on the basis of the configuration information. When the total number of the specific magnetic tapes is higher than the number of available tape drives, the use mode is determined and a command is issued to the tape library apparatus from the command controller to write data to the specific magnetic tape and to write to the common magnetic tape the respective pieces of the data.
Abstract:
An air-conditioning ventilator is provided with an air inlet passage and an air outlet passage for ventilation and also with a heat exchanger making use of a thermoelectric module for effecting an exchange of heat with air flowing through one of the passages. At least one of a heat-absorbing system and a heat-dissipating system of the heat exchanger is provided with a heat-transfer-medium-circulating system so that a heat transfer medium is forced to circulate in a liquid form for performing the exchange of heat.
Abstract:
A joint comprising a pillow ball having a spherical portion, a bearing for rotatably supporting the spherical portion, and a housing for housing the bearing. The housing has therein a housing bore having a first step for contacting one end of the bearing, a large bore contiguous to the housing bore via a second step, and an attaching bore contiguous to the large bore for receiving a dustproof covering. The depth of the first step is substantially equal to the axial length of the bearing. The joint further comprises an annular plug inserted into the large bore. The annular plug has a taper tapering off toward the side opposite to the housing bore, and the annular plug is pressed and secured onto the second step by caulking or deforming the inside of the housing to fit the taper. The annular plug and the bearing are thus prevented from coming out of the large bore and the housing bore, respectively. The composing members of the joint are simple in their structure and can be easily manufactured and assembled. After the joint is inserted into a mounting hole in a link mechanism, the caulked periphery of the housing is protected from the outside, thus enhancing the corrosion resistance of the joint.
Abstract:
Disclosed is a ball joint. The ball joint comprises a socket; a bearing provided along an inner face of said socket; and a ball stud embraced by said bearing; said socket including a stepped portion at an upper part and a rising portion rising integrally from an outer periphery of said stepped portion; said bearing including a flange portion at an upper part; said flange portion forcibly holding said ball stud to prevent a removal of said ball stud by caulking said stepped portion of said socket from upper and outer crosswise directions with said rising portion of said socket.
Abstract:
A storage system includes an interface processor for receiving a read or write request, a primary storage, a secondary storage, a storage control device and a temporary storage area for temporarily storing data for the primary storage in case that an access to the primary storage fails. The storage control device includes a controller for, in case that the access to the primary storage fails when the read request is received by the interface processor, determining whether the read requested data is stored on the temporary storage area, controlling to read the read requested data from the temporary storage area when the read requested data is stored on the temporary storage area, and controlling to read the read requested data from the secondary storage when the requested data is not stored on the temporary storage area.
Abstract:
A discharge lamp of the short arc type having an arc tube, a hermetically sealed tube at each of opposite ends of the, a pair of electrodes which are located in the arc tube, electrode rods which support the electrodes, support parts which are each formed by part of one of the hermetically sealed tubes, optionally cylindrical retaining bodies which are each located within and welded to a respective one of the support parts and in which a respective one of the electrode rods time is held securely, and a trigger component which is located on an outer side surface of the support parts, the support parts of the respective hermetically sealed tube and/or the cylindrical retaining bodies are formed of a material that contains a metal or a metallic compound for increasing the dielectric constant. In this way, even with a great distance between the electrodes of the lamp and a high gas filling pressure, the operating properties of the lamp can be improved and it can be reliably operated at a low breakdown voltage.
Abstract:
In a data recording apparatus, a monitoring unit detects a VLU including an MRB that manages an area that has not been accessed for a specified time period based on a current time, a time management table, and a parameter table. From MRBs of the detected VLU, the monitoring unit selects a plurality of MRBs with an unaccessed time period equal to or more than the specified time period and equal to or less than a total time. The monitoring unit performs synchronization process for data in a primary storage managed by the selected MRBs at a time. During the synchronization process, a correction value is adjusted when there is a data conflict with another device.
Abstract:
A backup data storage control unit makes a write-once storage medium store by-generation backup data in order of generations. A generation identification data storage control unit makes a generation identification data of the backup data stored at a storage position right in front of the by-generation backup data in the storage medium.