Abstract: A computer system is coupled to a first storage system in a first site and a second storage system in a second site. The computer system comprises: a memory configured to store information which indicates that data in each segment of a plurality of segments of a logical unit is stored in the first storage system or the second storage system; and a processor configured to: receive an instruction to deploy an application, the instruction including access characteristic of the application; and determine if a snapshot of the logical volume is to be created either in the first storage system or the second storage system based on the access characteristic of the application and the information stored in the memory.

Abstract: Provided is an in-wheel motor power cable in which a cross-sectional area of a conductor portion can be sufficiently assured for allowing large current to pass therethrough while avoiding excessively large maximum diameter of the cable. The power cable includes a conductor portion; an insulator configured to cover an outer circumference of the conductor portion; a hollow shield wire configured to cover an outer circumference of the insulator; and a sheath configured to cover an outer circumference of the shield wire. The conductor portion comprises a composite strand obtained by stranding a plurality of wire strands each of which is a strand of a plurality of filaments with no insulating layer, each filament being a tin-plated soft copper wire. The insulator is a soft fluororesin, and the shield wire is a braided copper-foiled yarn cable.

Abstract: Provided is an in-wheel motor power cable in which a cross-sectional area of a conductor portion can be sufficiently assured for allowing large current to pass therethrough while avoiding excessively large maximum diameter of the cable. The power cable includes a conductor portion; an insulator configured to cover an outer circumference of the conductor portion; a hollow shield wire configured to cover an outer circumference of the insulator; and a sheath configured to cover an outer circumference of the shield wire. The conductor portion comprises a composite strand obtained by stranding a plurality of wire strands each of which is a strand of a plurality of filaments with no insulating layer, each filament being a tin-plated soft copper wire. The insulator is a soft fluororesin, and the shield wire is a braided copper-foiled yarn cable.

Abstract: Exemplary embodiments provide a way to manage data recovery in a distributed system having multiple data store nodes. A storage system comprises: a first node including a first processor; and a plurality of second nodes coupled to the first node, each of the plurality of second nodes including a second processor and one or more second storage devices. The first processor is configured to control to store data and replication of the data in the second storage devices of two or more second nodes. If at least one of the second nodes has failed and a storage capacity of the plurality of second nodes is below a given threshold, one of the second nodes is configured to receive a first data, which is replication of data stored in a failed second node, from another of the second nodes, and create parity data based on the received first data.

Abstract: According to one embodiment, a storage system comprises a controller being configured to: receive a write data of an application from a computer; manage the write data as a plurality of data sets, each of the plurality of data sets having a size of a deduplication unit; and apply a deduplication function to each of the plurality of data sets. When a data set of the plurality of data sets has an application metadata portion containing application metadata, the controller separates the application metadata from the data set and fills the application metadata portion by a padding data and applies the deduplication function to the data set including the padding data.

Abstract: Exemplary embodiments provide subsidiary volume management. In one embodiment, a storage system comprises: a memory being operable to store information of a plurality of logical unit groups, each of the plurality of logical unit groups including information of an administrative logical unit (LU) and information of one or more subsidiary LUs to be accessed from a virtual machine on a computer; and a controller being operable to create or select an administrative LU and to inform the computer of the created or selected administrative LU according to evaluation of a subsidiary LU which relates to another administrative LU, when the controller receives a command from the computer to said another administrative LU.

Abstract: Provided is a composite semiconductor device that has a low on-resistance and a high load-short-circuit resistance. In a composite semiconductor device (10) including a normally-on first FET (Q1) and a normally-off second FET (Q2) that are cascode-connected to each other. In a case where a voltage applied to a drain of the first FET (Q1) is 400 V, a relation of the following expression is satisfied: [ Math .

Abstract: Provided is a composite semiconductor device that has a low on-resistance and a high load-short-circuit resistance. In a composite semiconductor device (10) including a normally-on first FET (Q1) and a normally-off second FET (Q2) that are cascode-connected to each other. In a case where a voltage applied to a drain of the first FET (Q1) is 400 V, a relation of the following expression is satisfied: [ Math .

Abstract: A computer system is coupled to one or more servers which run one or more applications. The computer system comprises: a memory storing key data, value data associated with each of the key data, and application mask data, the application mask data indicating, for each of the value data, which application is allowed to access said each value data based on the key data associated with the value data; and a processor configured to: receive a get operation which includes a first key data and a first application identifier, the first application identifier identifying a first application which issues the get operation; determine whether the first application is allowed to access a first value data associated with the first key data based on the application mask data; and return the first value data if the application mask data indicates the first application is allowed to access the first value data.

Abstract: A computer system is coupled to a first storage system in a first site and a second storage system in a second site. The computer system comprises: a memory configured to store information which indicates that data in each segment of a plurality of segments of a logical unit is stored in the first storage system or the second storage system; and a processor configured to: receive an instruction to deploy an application, the instruction including access characteristic of the application; and determine if a snapshot of the logical volume is to be created either in the first storage system or the second storage system based on the access characteristic of the application and the information stored in the memory.

Abstract: A synchronous motor control device for an electric vehicle is provided which is able to reduce torque ripple through simple calculation and is excellent in practicability. In a synchronous motor control device which controls a traction synchronous motor, torque ripple compensation unit is provided which adds, to a motor drive current, a sine-wave correction current whose phase is opposite to that of torque ripple which is generated in the motor and has a frequency which is six times that of a rotation speed of the motor. Specifically, in the case of a configuration including a vector control type basic controller, the torque ripple compensation unit outputs a correction current command iq_c, and a value iq_ref obtained by adding the correction current command iq_c to a q-axis current command is used for control.

Abstract: Systems and methods directed to the automation of Storage Area Network (SAN) configuration when storage volume migration or server virtual machine migration is conducted. Systems and methods described herein may involve the takeover of a SAN network attribute for the migration, and may involve translation of zone object formats to facilitate the migration and ensure compatibility when the takeover is conducted.

Abstract: In one embodiment, a storage system comprises: a first type interface being operable to communicate with a server using a remote memory access; a second type interface being operable to communicate with the server using a block I/O (Input/Output) access; a memory; and a controller being operable to manage (1) a first portion of storage areas of the memory to allocate for storing data, which is to be stored in a physical address space managed by an operating system on the server and which is sent from the server via the first type interface, and (2) a second portion of the storage areas of the memory to allocate for caching data, which is sent from the server to a logical volume of the storage system via the second type interface and which is to be stored in a storage device of the storage system corresponding to the logical volume.

Abstract: Exemplary embodiments provide subsidiary volume management. In one embodiment, a storage system comprises: a memory being operable to store information of a plurality of logical unit groups, each of the plurality of logical unit groups including information of an administrative logical unit (LU) and information of one or more subsidiary LUs to be accessed from a virtual machine on a computer; and a controller being operable to create or select an administrative LU and to inform the computer of the created or selected administrative LU according to evaluation of a subsidiary LU which relates to another administrative LU, when the controller receives a command from the computer to said another administrative LU.

Abstract: Systems and methods described herein involve a virtual storage utilized to virtualize the storage of storage systems across multiple sites. The virtual storage is associated with a virtual multipath control. The virtual multipath control manages the virtual path state of the inter-physical storage, the remote copy volume state which has primary volume or secondary volume state, and the volume copy operation mode such as synchronous copy mode journal copy mode, or bitmap resync mode. The virtual multipath control of the virtual storage facilitates choices from the host for a preferred site, path, state, and volume by utilizing a virtual multipath state from a get virtual multipath information command.

Abstract: A virtual LU astride a plurality of storage devices is a virtual volume composed of a plurality of partial volumes. Functions of the storage system, Zoning information of a SAN and a host group information of the virtual volume are inherited to a partial volume created for each physical device. When a page granularity data migration is executed, volume or data are migrated to other storage devices without depending on the relationship between a physical port and the physical device. When a host IO request is received when migration is on-going, response processing is performed by synchronizing storage devices within the range of migration data. The host IO request related to the page being migrated sends a partial complete response including information for re-routing the request to a path of the appropriate data migration destination device capable of issuing the IO.

Abstract: Exemplary embodiments provide a way to manage data recovery in a distributed system having multiple data store nodes. A storage system comprises: a first node including a first processor; and a plurality of second nodes coupled to the first node, each of the plurality of second nodes including a second processor and one or more second storage devices. The first processor is configured to control to store data and replication of the data in the second storage devices of two or more second nodes. If at least one of the second nodes has failed and a storage capacity of the plurality of second nodes is below a given threshold, one of the second nodes is configured to receive a first data, which is replication of data stored in a failed second node, from another of the second nodes, and create parity data based on the received first data.

Abstract: Example implementations described herein are directed to implementation of the atomic write feature in the storage system setting. Example implementations may utilize flash memory to facilitate or to form atomic write commands to improve flash memory performance and endurance. Several protocols involving the cache unit of the storage system may include managing a status of the storage system so that data corresponding to an atomic write command are stored in a cache unit, with old data maintained in the storage system until the write data corresponding to an atomic write command is properly received.

Abstract: According to one embodiment, a storage system comprises a controller being configured to: receive a write data of an application from a computer; manage the write data as a plurality of data sets, each of the plurality of data sets having a size of a deduplication unit; and apply a deduplication function to each of the plurality of data sets. When a data set of the plurality of data sets has an application metadata portion containing application metadata, the controller separates the application metadata from the data set and fills the application metadata portion by a padding data and applies the deduplication function to the data set including the padding data.

Abstract: An aspect of the invention is directed to a storage management computer for managing offloading of storage workload between a storage controller of a storage system and one or more host computers. The storage management computer comprises: a memory; and a controller operable to request a virtual machine management computer to register the storage controller as a host computer, and to send, to the virtual machine management computer, storage processes information of storage processes in the storage system which can be offloaded as virtual machines in order for the virtual machine management computer to register the storage processes as virtual machines.