Abstract: A first aspect of the present invention is carbon fiber wherein the surface of a monofilament has a center line average roughness Ra of 6.0 nm or more and 13 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. A second aspect of the present invention is carbon fiber precursor acrylic fiber wherein the surface of a monofilament has a center line average roughness Ra of 18 nm or more and 27 nm or less, and the monofilament has a long diameter/short diameter ratio of 1.11 or more and 1.245 or less. The carbon fiber according to the first aspect is obtained by stabilizing and carbonizing under specific conditions the carbon fiber precursor acrylic fiber according to the second aspect.

Abstract: A motor control system includes host control circuitry configured to generate a first control command; a plurality of motor control apparatuses configured to control a plurality of motors, respectively, based on the first control command; and reference information output circuitry configured to output reference information to one of the plurality of motor control apparatuses which is configured to control one of the plurality of motors. The reference information relates to control of the plurality of motors. Each of the plurality of motor control apparatuses corresponds to a corresponding motor among the plurality of motors and includes information sharing circuitry configured to share the reference information among the plurality of motor control apparatuses via data communication; command conversion circuitry configured to convert the reference information into a second control command; and motor control circuitry configured to control the corresponding motor based on the second control command.

Abstract: In an information processing apparatus, an execution unit executes a first program and a second program. While the information processing apparatus acts as a slave that performs a program update process in response to instructions from a different information processing apparatus, an update control unit updates the first program to a first updated program as a program to be executed. While the information processing apparatus acts as a master that controls the program update process, the update control unit updates the second program to a second updated program as a program to be executed, and notifies a management apparatus of a progress state of the program update process according to the first program or first updated program.

Abstract: A storage control device configured to be coupled to a storage device including a first portion and a second portion, the storage control device includes a memory, and a processor configured to control an operation mode of the first portion of the storage device to be in a first mode and a second mode, a first power consumed by the first portion in the first mode being less than a second power consumed by the first portion in the second mode, set the operation mode of the first portion in the first mode, receive a first request, determine whether the received first request is a polling access request, and when the received first request is the polling access request, keep the operation mode of the first portion in the first mode, and read first data from the second portion.

Abstract: When a power-saving period registered in device management information is reached, a processor of a storage control apparatus sets an operation mode of the corresponding storage device to a power-saving mode. In addition, the processor deletes identification information of data stored in a storage device whose power-saving period is registered in the device management information, from data management information in which identification information of data that could be copied to a cache from at least one access-destination storage device asynchronously with access by the host apparatus is registered.

Abstract: In an information processing apparatus, an execution unit executes a first program and a second program. While the information processing apparatus acts as a slave that performs a program update process in response to instructions from a different information processing apparatus, an update control unit updates the first program to a first updated program as a program to be executed. While the information processing apparatus acts as a master that controls the program update process, the update control unit updates the second program to a second updated program as a program to be executed, and notifies a management apparatus of a progress state of the program update process according to the first program or first updated program.

Abstract: A storage device includes first and second data transceivers connected to an upper level device through first and second paths, respectively, and a third processor. The first data transceiver includes a first processor configured to perform an access control of a first logical memory group by executing first firmware. The second data transceiver performs an access control of a second logical memory group. The third processor is configured to change, when all of logical memories included in the first logical memory group are included in the second logical memory group, recommendation levels of the first path and the second path such that a first recommendation level of the first path is lower than a second recommendation level of the second path if the first recommendation level is higher than or equal to the second recommendation level, and update the first firmware when no data is flowing through the first path.

Abstract: A storage unit stores information on the compatibility between different versions of firmware used for controlling two redundant modules provided in a storage apparatus. Upon updating firmware of the modules from a first version to a second version incompatible with the first version, a computing unit applies, alternately to one of the modules, firmware of a version that is one of versions from the first version to the second version, that is compatible with firmware of a version currently applied to the other one of the modules, and that is more recent than the version currently applied to the other one of the modules, by referring to the information.

Abstract: In a storage control apparatus, an acquiring unit acquires first information indicating the frequency of random access to a first logical region and second information indicating the data size of random access, based on the content of access from the information processing apparatus. A controlling unit determines the size of storage areas to be allocated to a second logical region based on the second information indicating the data size of random access when the first information indicates that the frequency of random access is equal to or greater than a threshold value. The controlling unit creates the second logical region using a plurality of storage devices. The controlling unit controls access from the information processing apparatus such that the access is made to the second logical region instead of the first logical region.

Abstract: A storage control device configured to be coupled to a storage device including a first portion and a second portion, the storage control device includes a memory, and a processor configured to control an operation mode of the first portion of the storage device to be in a first mode and a second mode, a first power consumed by the first portion in the first mode being less than a second power consumed by the first portion in the second mode, set the operation mode of the first portion in the first mode, receive a first request, determine whether the received first request is a polling access request, and when the received first request is the polling access request, keep the operation mode of the first portion in the first mode, and read first data from the second portion.

Abstract: When a power-saving period registered in device management information is reached, a processor of a storage control apparatus sets an operation mode of the corresponding storage device to a power-saving mode. In addition, the processor deletes identification information of data stored in a storage device whose power-saving period is registered in the device management information, from data management information in which identification information of data that could be copied to a cache from at least one access-destination storage device asynchronously with access by the host apparatus is registered.

Abstract: A storage device includes first and second data transceivers connected to an upper level device through first and second paths, respectively, and a third processor. The first data transceiver includes a first processor configured to perform an access control of a first logical memory group by executing first firmware. The second data transceiver performs an access control of a second logical memory group. The third processor is configured to change, when all of logical memories included in the first logical memory group are included in the second logical memory group, recommendation levels of the first path and the second path such that a first recommendation level of the first path is lower than a second recommendation level of the second path if the first recommendation level is higher than or equal to the second recommendation level, and update the first firmware when no data is flowing through the first path.

Abstract: A storage unit stores information on the compatibility between different versions of firmware used for controlling two redundant modules provided in a storage apparatus. Upon updating firmware of the modules from a first version to a second version incompatible with the first version, a computing unit applies, alternately to one of the modules, firmware of a version that is one of versions from the first version to the second version, that is compatible with firmware of a version currently applied to the other one of the modules, and that is more recent than the version currently applied to the other one of the modules, by referring to the information.

Abstract: A storage control system includes: storage units each including a first storage area storing information and a second storage area storing management information that contains attribute information of partition information indicating how information is stored in partitions obtained by partitioning the first storage area; an obtaining unit to obtain the management information from the plurality of storage units; a determination unit to determine whether abnormal management information is present in the obtained management information by comparing the obtained management information with itself; and a recovery unit to reconfigure, when it is determined there is the abnormal management information, for each unit of partition, information stored in the first storage area of the storage unit from which the abnormal management information has been obtained by using one of the storage units from which normal management information has been obtained, based on attribute information of the normal management information

Abstract: In order to more efficiently use a cache memory to realize improved response ability in a storage system, there provided are a cache memory which stores the data read from the storage apparatus, an access monitoring unit which monitors a state of access from the upper apparatus to the data stored in the storage apparatus, a schedule information creating unit which creates schedule information that determines contents to be stored in the cache memory based on the access state, and a memory controlling unit which controls record-processing of the data from the storage apparatus to the cache memory and removal-processing of the data from the cache memory based on the schedule information.

Abstract: A storage control apparatus includes a controller configured to control to convert an access to logical volume into an access to associated RAID group in response to an access to the corresponding virtual volume on the basis of access conversion information, monitor frequency of access to each of logical volumes, select a logical volume on the basis of the monitored frequency of access, move data stored in a RAID group corresponding to the selected logical volume to a different RAID group corresponding to a logical volume to be a data shift destination, and update the access conversion information to convert access to the RAID group corresponding to the selected logical volume into access to the different RAID group.

Abstract: A RAID group control device for performing access control over one or more RAID groups each having redundancy. The RAID group control device includes an acquiring unit to acquire access frequency information with respect to a RAID group among the one or more RAID groups; a scheduling unit to find a time period exhibiting a lower access frequency than access frequencies of anterior and posterior time periods in a specified time range on the basis of the access frequency information, and to determine start timing of a process of rewriting firmware of drives belonging to the RAID group on the basis of the found time period; and a firmware rewrite processing unit to start the process of rewriting the firmware of the drives at the determined start timing.

Abstract: A storage control system includes: storage units each including a first storage area storing information and a second storage area storing management information that contains attribute information of partition information indicating how information is stored in partitions obtained by partitioning the first storage area; an obtaining unit to obtain the management information from the plurality of storage units; a determination unit to determine whether abnormal management information is present in the obtained management information by comparing the obtained management information with itself; and a recovery unit to reconfigure, when it is determined there is the abnormal management information, for each unit of partition, information stored in the first storage area of the storage unit from which the abnormal management information has been obtained by using one of the storage units from which normal management information has been obtained, based on attribute information of the normal management information

Abstract: A storage control apparatus includes a controller for receiving an access command from a host computer and controlling an access to a storage device and a monitoring period obtaining section for obtaining a monitoring period corresponding to the access command. The storage device is capable of operating in one of a power saving state and a normal state. The controller causes the storage device to return from the power-saving state to the normal state if the storage device corresponding to the access command is in the power saving state, and sends the host computer a response for preventing a timeout corresponding to the access command if the storage device have not yet returned to the normal state when the monitoring period elapses from receiving the access command.

Abstract: A storage controller and method are provided. The storage controller includes control sections including storage sections into which data transmitted from a host unit is cached, one of the control sections being a main control section which controls firmware update in the control sections. The main control section includes an instruction updater sending an update instruction to a sub control section in the control sections in which firmware is to be updated, and an area instructor requesting the sub control section to transmit area information, the sub control section including an area information obtainer obtaining, according to the instruction from the area instructor and an area information transmitter transmitting to the area instructor; and an area setter setting the location of the cache area in the storage section on the basis of the instruction.