Abstract: A storage control program for causing a computer to perform a process comprising; determining a second number indicating a number of first storage devices in each of which a connection with a controller is established among the two or more first storage devices; and performing control such that a second storage devices, in each of which a connection with the controller is not established among the two or more first storage devices, are caused to transition to a power saving state in a time period in which the second number reaches a first number indicating a number of communication routes used when the controller accesses the two or more first storage devices.

Abstract: A relay apparatus includes first and second board modules and a bridge module. The first board module is configured to relay the communications among the plurality of electronic devices, the plurality of electronic devices being connected to the first board module. The second board module is configured to relay the communications among the plurality of electronic devices, the plurality of electronic devices being connected to the second board module. The bridge module is configured to communicatively connect the first board module and the second board module.

Abstract: A storage control program for causing a computer to perform a process comprising; determining a second number indicating a number of first storage devices in each of which a connection with a controller is established among the two or more first storage devices; and performing control such that a second storage devices, in each of which a connection with the controller is not established among the two or more first storage devices, are caused to transition to a power saving state in a time period in which the second number reaches a first number indicating a number of communication routes used when the controller accesses the two or more first storage devices.

Abstract: In a storage system, when there is a power failure for a power supply, a control unit of a master apparatus does not have all of the dirty data stored in the cache regions of a plurality of storage control apparatuses stored into their nonvolatile memories and instead has part of the dirty data stored from mirror cache regions of adjacent storage control apparatuses into their nonvolatile memories. When doing so, the ratio between the amount of data stored from a cache region and the amount of data stored from a mirror cache region is decided so that the differences in the amount of data stored in the respective nonvolatile memories are within a predetermined range.

Abstract: A relaying apparatus placed between a control apparatus and a storage device in a storage apparatus includes a first connection unit, a second connection unit and a processor. The first connection unit is connected to a storage device. A detecting unit detects a link-down of the first connection unit. The processor executes a process in which, the address of the storage device that was connected to the first connection unit when the link-down has occurred to the first connection unit matches the address of the storage device connected to the second connection unit when the link-up has occurred to the second connection unit, and an access request is given from the control apparatus with an attached first identifier that identifies the first connection unit, data is forwarded via the second connection unit.

Abstract: A relay apparatus includes first and second board modules and a bridge module. The first board module is configured to relay the communications among the plurality of electronic devices, the plurality of electronic devices being connected to the first board module. The second board module is configured to relay the communications among the plurality of electronic devices, the plurality of electronic devices being connected to the second board module. The bridge module is configured to communicatively connect the first board module and the second board module.

Abstract: A transmission unit connected to a reception unit via a communication cable. The transmission unit includes: a diagnostic data transmitting section to transmit, to the reception unit via the communication cable, diagnostic data converted into signals under a signal conversion condition for a diagnosis, of which a value of at least one parameter is different from a signal conversion condition for a transmission defined as a data-to-signal conversion condition for transmitting data to the reception unit; and a diagnosing section to diagnose a status of the communication cable on the basis of a diagnostic data error rate measured by the reception unit receiving the diagnostic data.

Abstract: A relaying apparatus placed between a control apparatus and a storage device in a storage apparatus includes a first connection unit, a second connection unit and a processor. The first connection unit is connected to a storage device. A detecting unit detects a link-down of the first connection unit. The processor executes a process in which, the address of the storage device that was connected to the first connection unit when the link-down has occurred to the first connection unit matches the address of the storage device connected to the second connection unit when the link-up has occurred to the second connection unit, and an access request is given from the control apparatus with an attached first identifier that identifies the first connection unit, data is forwarded via the second connection unit.

Abstract: A storage apparatus connectable to a computer for transmitting a frame includes a plurality of switches connected by a cascade connection, and a plurality of storages connected to the plurality of switches, wherein at least one of the plurality of switches includes a memory for storing latency value corresponding to a destination address of the frame, the destination address indicating one of the plurality of storages and the computer of a destination of the frame, the latency value indicating an amount of delaying to begin a transmission of the frame, and a port for executing a process including receiving the frame, reading out the latency value corresponding to the destination address included in the received frame from the memory, and transmitting the frame after a time corresponding to the latency value elapsed.

Abstract: A transmission unit connected to a reception unit via a communication cable. The transmission unit includes: a diagnostic data transmitting section to transmit, to the reception unit via the communication cable, diagnostic data converted into signals under a signal conversion condition for a diagnosis, of which a value of at least one parameter is different from a signal conversion condition for a transmission defined as a data-to-signal conversion condition for transmitting data to the reception unit; and a diagnosing section to diagnose a status of the communication cable on the basis of a diagnostic data error rate measured by the reception unit receiving the diagnostic data.

Abstract: A storage apparatus includes a storage unit that stores received data, an investigation frame transmission unit that transmits investigation frames to a plurality of other storage apparatuses connected through a communication network, a performance information creation unit that creates performance information for the plurality of other storage apparatuses on the basis of reception results of response frames transmitted in response to the investigation frames, a destination determination unit that determines a destination storage apparatus from among the plurality of other storage apparatuses on the basis of the created performance information, and a movement process unit that executes a movement process in which the data is moved from the storage unit to the destination storage apparatus.

Abstract: A communication control apparatus in a RAID device including redundant communication paths to storage devices includes a blocking unit. The blocking unit blocks configuration change notifications outputted from the storage devices to a control apparatus, which controls access to the storage devices, when a power of a communication relay device arranged on the redundant paths connecting the storage devices and the control apparatus is turned off.

Abstract: A switch device includes two cascade ports each connected to another switch device; at least one direct port connected to a storage medium; a hop-count determining unit that determines whether a frame input from one cascade port has already gone through a predetermined number of switch devices; an output unit that outputs the frame from another cascade port when it is determined that the frame has not gone through the predetermined number of switch devices; and a port determining unit that determines a direct port for outputting the frame when it is determined that the frame has already gone through the predetermined number of switch devices.

Abstract: A storage apparatus connectable to a computer for transmitting a frame includes a plurality of switches connected by a cascade connection, and a plurality of storages connected to the plurality of switches, wherein at least one of the plurality of switches includes a memory for storing latency value corresponding to a destination address of the frame, the destination address indicating one of the plurality of storages and the computer of an destination of the frame, the latency value indicating an amount of delaying to begin a transmission of the frame, and a port for executing a process including receiving the frame, reading out the latency value corresponding to the destination address included in the received frame from the memory, and transmitting the frame after a time corresponding to the latency value elapsed.

Abstract: A computer device includes a plurality of information processing units configured to execute respective information processing functions, a plurality of storage units, one of which is arranged in each of the information processing units, and which are removable, a plurality of storage devices physically dispersed in the storage units, and having a redundant configuration, where one storage unit includes at least two storage devices, and a plurality of controllers configured to be installed in the information processing units, and to access the storage devices, where each information processing unit includes one of the controllers.

Abstract: A communication control apparatus in a RAID device including redundant communication paths to storage devices includes a blocking unit. The blocking unit blocks configuration change notifications outputted from the storage devices to a control apparatus, which controls access to the storage devices, when a power of a communication relay device arranged on the redundant paths connecting the storage devices and the control apparatus is turned off.

Abstract: A switch device includes two cascade ports each connected to another switch device; at least one direct port connected to a storage medium; a hop-count determining unit that determines whether a frame input from one cascade port has already gone through a predetermined number of switch devices; an output unit that outputs the frame from another cascade port when it is determined that the frame has not gone through the predetermined number of switch devices; and a port determining unit that determines a direct port for outputting the frame when it is determined that the frame has already gone through the predetermined number of switch devices.

Abstract: A storage system includes a route switch, connected to at least two different communication lines different in path between each of switches and the route switch. Upon detecting a fault on a communication line extending to the switch, the route switch converts a destination address of a frame into a modified address in accordance with an address conversion table. The route switch thus controls a frame exchanged between a calculation device and each of the switches.

Abstract: A data relaying apparatus includes an encrypting unit and a decrypting unit. The encrypting unit receives data from a first computing device from among computing devices, encrypts the received data, and forwards the encrypted data to a first storage device from among storage devices. The decrypting unit receives encrypted data from the first storage device, decrypts the received data, and forwards the decrypted data to the first computing device.

Abstract: A computer device includes a plurality of information processing units configured to execute respective information processing functions, a plurality of storage units, one of which is arranged in each of the information processing units, and which are removable, a plurality of storage devices physically dispersed in the storage units, and having a redundant configuration, where one storage unit includes at least two storage devices, and a plurality of controllers configured to be installed in the information processing units, and to access the storage devices, where each information processing unit includes one of the controllers.