Abstract: Availability of an information system including a storage apparatus and a computer is improved. First and second storage apparatuses execute remote copy of copying data written into a first primary volume from the computer to a second primary volume, at least one of the first and second storage apparatuses executes local copy of copying the data written into the first or second primary volume in a self-storage apparatus to the corresponding first or second secondary volume, and the computer switches the destination of a write request of the data from the first storage apparatus to the second storage apparatus in case of a failure occurring in the first storage apparatus.

Abstract: The present invention controls supply of power to a storage device on the basis of an access status, moves a logical storage device between physical storage devices having different power supply modes, reduces energization time, and improves the reliability. A relocation plan creation portion creates a relocation plan by disposing a logical volume with high access frequency in a RAID group which is in a long-time energization mode, disposing a logical volume with moderate access frequency in a RAID group which is in a first short-time energization mode, and disposing a logical volume with low access frequency in a RAID group which is in a second short-time energization mode. An execution time determination portion determines an execution time for executing the relocation plan, on the basis of the access frequency to the RAID groups.

Abstract: Availability of an information system including a storage apparatus and a computer is improved. First and second storage apparatuses execute remote copy of copying data written into a first primary volume from the computer to a second primary volume, at least one of the first and second storage apparatuses executes local copy of copying the data written into the first or second primary volume in a self-storage apparatus to the corresponding first or second secondary volume, and the computer switches the destination of a write request of the data from the first storage apparatus to the second storage apparatus in case of a failure occurring in the first storage apparatus.

Abstract: A vehicle including an energy stocking mechanism having an elastic member connected to the driving wheel of the vehicle so that power of the driving wheel is stocked as elastic force in the elastic member and the stocked elastic force is output as power to the driving wheel, and an output limiter that holds the energy stocking mechanism when the elastic force is stocked in the elastic member and releases the holding of the energy stocking mechanism to output the elastic force when the vehicle starts running. A power stocking source for stocking elastic force into the energy stocking mechanism is installed in the vehicle or a station at which the vehicle stops, and connected to the energy stocking mechanism so that power from the power stocking source is applied to the energy stocking mechanism and stocked as the elastic force in the energy stocking mechanism.

Abstract: Availability of an information system including a storage system that performs remote copy between two or more storage apparatuses and a host computer using such storage system is improved. A third storage apparatus including a third volume is coupled to a first storage apparatus, a fourth storage apparatus including a fourth volume is coupled to a second storage apparatus, the first and third storage apparatuses perform remote copy of copying data stored in a first volume to the third volume, the first and second storage apparatuses perform remote copy of copying data stored in the first volume to a second volume, and the third and fourth storage apparatuses perform remote copy of copying data stored in the third volume to the fourth volume.

Abstract: A dielectric ceramic composition of the invention comprises: BaTiO3 as a main component, MgO: 0.50 to 3.0 moles, MnO: 0.05 to 0.5 moles, oxide (RE12O3) of element selected from Sm, Eu, and Gd, oxide (RE22O3) of element selected from Tb and Dy, oxide (RE32O3) of element selected from Y, Ho, Er, Yb, Tm and Lu, BaZrO3: 0.20 to 1.0 moles, and oxide of element selected from V, Ta, Mo, Nb, and W: 0.05 to 0.25 moles as subcomponents wherein each subcomponent is calculated as a conversion of an oxide or composite oxide, with respect to 100 moles of the main component, and contents of said RE12O3, RE22O3 and RE32O3 satisfy RE12O3<RE22O3 and (RE12O3+RE22O3)?RE32O3.

Abstract: Availability of an information system including a storage system that performs remote copy between two or more storage apparatuses and a host computer using such storage system is improved. A third storage apparatus including a third volume is coupled to a first storage apparatus, a fourth storage apparatus including a fourth volume is coupled to a second storage apparatus, the first and third storage apparatuses perform remote copy of copying data stored in a first volume to the third volume, the first and second storage apparatuses perform remote copy of copying data stored in the first volume to a second volume, and the third and fourth storage apparatuses perform remote copy of copying data stored in the third volume to the fourth volume.

Abstract: A production method of a dielectric ceramic composition comprising a main component including barium titanate expressed by a composition formula of BamTiO2+m, wherein “m” satisfies 0.990<m<1.010, a fourth subcomponent including an oxide of R (note that R is at least one selected from Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu), and other subcomponent including at least BaO; comprising steps of preparing a post-reaction material by bringing a material of said main component to react in advance with at least a part of a material of said fourth subcomponent, wherein, when an amount of BaO included in said other subcomponent is n mole with respect to 100 moles of said main component, and said main component and said BaO are expressed by a composition formula of Bam+n/100TiO2+m+n/100, wherein “m” and “n” satisfy 0.994<m+n/100<1.

Abstract: The present invention controls supply of power to a storage device on the basis of an access status, moves a logical storage device between physical storage devices having different power supply modes, reduces energization time, and improves the reliability. A relocation plan creation portion creates a relocation plan by disposing a logical volume with high access frequency in a RAID group which is in a long-time energization mode, disposing a logical volume with moderate access frequency in a RAID group which is in a first short-time energization mode, and disposing a logical volume with low access frequency in a RAID group which is in a second short-time energization mode. An execution time determination portion determines an execution time for executing the relocation plan, on the basis of the access frequency to the RAID groups.

Abstract: The storage system of the present invention preserves data long-term by using memory devices such as flash memory devices. A flash memory mounting unit of a storage apparatus has a plurality of flash memory devices. Logical devices are set up in the storage region of the flash memory devices. A start-up scheduler controls start-up of internal refresh processing and external refresh processing. A refresh function management table respectively manages the method of refreshing the data stored in the flash memory devices and the refresh time, for each logical device. The start-up scheduler, on discovering that a logical device has reached its refresh period, sends a start-up command to the storage apparatus or external apparatus, to start-up internal refresh processing or external refresh processing.

Abstract: A storage group configured by a plurality of storage devices is configured by a plurality of storage sub-groups, and the respective storage sub-groups are configured from two or more storage devices. A sub-group storage area, which is the storage area of the respective storage sub-groups, is configured by a plurality of rows of sub-storage areas. A data set, which is configured by a plurality of data elements configuring a data unit, and a second redundancy code created on the basis of this data unit, is written to a row of sub-storage areas, a compressed redundancy code is created on the basis of two or more first redundancy codes respectively created based on two or more data units of two or more storage sub-groups, and this compressed redundancy code is written to a nonvolatile storage area that differs from the above-mentioned two or more storage sub-groups.

Abstract: A dielectric ceramic composition of the invention comprises: BaTiO3 as a main component, MgO: 0.50 to 3.0 moles, MnO: 0.05 to 0.5 moles, oxide (RE12O3) of element selected from Sm, Eu, and Gd, oxide (RE22O3) of element selected from Tb and Dy, oxide (RE32O3) of element selected from Y, Ho, Er, Yb, Tm and Lu, BaZrO3: 0.20 to 1.0 moles, and oxide of element selected from V, Ta, Mo, Nb, and W: 0.05 to 0.25 moles as subcomponents wherein each subcomponent is calculated as a conversion of an oxide or composite oxide, with respect to 100 moles of the main component, and contents of said RE12O3, RE22O3 and RE32O3 satisfy RE12O3<RE22O3 and (RE12O3+RE22O3)?RE32O3.

Abstract: The present invention controls supply of power to a storage device on the basis of an access status, moves a logical storage device between physical storage devices having different power supply modes, reduces energization time, and improves the reliability. A relocation plan creation portion creates a relocation plan by disposing a logical volume with high access frequency in a RAID group which is in a long-time energization mode, disposing a logical volume with moderate access frequency in a RAID group which is in a first short-time energization mode, and disposing a logical volume with low access frequency in a RAID group which is in a second short-time energization mode. An execution time determination portion determines an execution time for executing the relocation plan, on the basis of the access frequency to the RAID groups.

Abstract: A storage system having a cluster configuration that prevents a load from concentrating on a certain storage node and enhances access performance is disclosed. The storage system is provided with plural storage adaptors having a cache memory for storing data read/written according to an I/O request from a host and a device for holding the data stored in the cache memory, means for connecting an external storage having a logical device that handles the read/written data and a cache memory to the storage adaptor, means for monitoring and grasping a usage situation of each cache memory of the plural storage adaptors and means for referring to information of the usage situation of each cache memory acquired by the grasping means and selecting any of the storage adaptors so that usage of each cache memory is equalized, and the logical device of the external storage is controlled by the storage adaptor selected by the selection means via connection means.

Abstract: A storage apparatus installed in a first site generates a snapshot of a copy source logical device in an intermediate logical device. Next, an external storage apparatus including a logical device corresponding to the intermediate logical device is disconnected from the first site and connected to the second site. A storage apparatus in the second site is made to recognize the logical device in the external storage device as a logical device of a remote copy target. Next, the storage apparatus instructs the second site about writing in the copy target logical device through a global network on the basis of the difference data managed with the bit map.

Abstract: There are disclosed a method and device for polishing a metal ring, which is capable of polishing a side edge of the metal ring without performing barrel polishing or polishing by grinding stones. Subsequently to a projecting step of projecting a metal ring W by clearing means 6, a first brush polishing step of polishing one edge of the metal ring W by a polishing brush 60 is performed. Subsequently, an inverting step of inverting the metal ring W whose one edge is polished by the first brush polishing step is inverted by the inverting means 10 is performed. Subsequently, a second brush polishing step of polishing the other edge of the metal ring W which is inverted by the inverting step by the polishing brush 60 is performed. Moreover, a clearing step of clearing the metal ring whose other edge is polished by the second brush polishing step by clearing means 7 is performed.

Abstract: A production method of a dielectric ceramic composition using a reacted material obtained by making a main component including barium titanate react with a fourth subcomponent including an oxide of R (note that R is at least one selected from Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu). According to the invention, a dielectric ceramic composition capable of improving the specific permittivity without deteriorating other electric characteristics (for example, a temperature characteristic of the capacitance, insulation resistance, accelerated lifetime of the insulation resistance and dielectric loss), and the production method can be provided.

Abstract: Availability of an information system including a storage apparatus and a computer is improved. First and second storage apparatuses execute remote copy of copying data written into a first primary volume from the computer to a second primary volume, at least one of the first and second storage apparatuses executes local copy of copying the data written into the first or second primary volume in a self-storage apparatus to the corresponding first or second secondary volume, and the computer switches the destination of a write request of the data from the first storage apparatus to the second storage apparatus in case of a failure occurring in the first storage apparatus.

Abstract: Availability of an information system including a storage system that performs remote copy between two or more storage apparatuses and a host computer using such storage system is improved. A third storage apparatus including a third volume is coupled to a first storage apparatus, a fourth storage apparatus including a fourth volume is coupled to a second storage apparatus, the first and third storage apparatuses perform remote copy of copying data stored in a first volume to the third volume, the first and second storage apparatuses perform remote copy of copying data stored in the first volume to a second volume, and the third and fourth storage apparatuses perform remote copy of copying data stored in the third volume to the fourth volume.

Abstract: Availability of an information system including a storage apparatus and a host computer is improved. A host system includes a first storage apparatus provided with a first volume for storing data, and a second storage apparatus for storing the data sent from the first storage apparatus. In case of a failure occurring in the first storage apparatus, the host sends the data to be sent to the first storage apparatus to the second storage apparatus.