Abstract: At the time of a fan failure of a plurality of fans for cooling redundant controllers, data loss can be avoided even if a power source of each controller is controlled. A storage system includes: a first controller for controlling a first power source; a plurality of first fans for cooling the first controller; a second controller for controlling a second power source; a plurality of second fans for cooling the second controller; and a storage device including a plurality of storage units; wherein if a fan failure of the first fans occurs, the first controller controls the first power source in a standby state on condition that the second controller is in a normal state; and if the second power source is in the standby state, the first controller executes destaging processing and then controls the first power source in the standby state.

Abstract: A controller is able to specify one of multiple protocols, and to operate a network interface using the specified protocol. A storage apparatus comprises a network interface part, which is coupled to a computer via a network, and a controller, which is coupled to the network interface part, receives a request from the computer via the network and the network interface part, and accesses a storage medium on the basis of the request. The controller specifies one protocol from among multiple protocols, and sends protocol information denoting the specified protocol to the network interface part. The network interface part configures a protocol denoted by the protocol information, and carries out communications with the network in accordance with the configured protocol.

Abstract: At the time of a fan failure of a plurality of fans for cooling redundant controllers, data loss can be avoided even if a power source of each controller is controlled. A storage system includes: a first controller for controlling a first power source; a plurality of first fans for cooling the first controller; a second controller for controlling a second power source; a plurality of second fans for cooling the second controller; and a storage device including a plurality of storage units; wherein if a fan failure of the first fans occurs, the first controller controls the first power source in a standby state on condition that the second controller is in a normal state; and if the second power source is in the standby state, the first controller executes destaging processing and then controls the first power source in the standby state.

Abstract: Disclosed is a storage device 10 in which CPUs 132 are redundantly configured, and which is thus capable of performing dual-writing of data into cache memories 134 respectively coupled to the CPUs 132. In the storage device 10, general-purpose processors each including an NTB_Port 72, PCI_Ports 73 and a Memory_I/F 74 are used as CPUs 132 of the CPUs 132. In the storage device 10, when a first PCIe_Port 73 determines not to perform the dual-writing, a first NTB_Port 1322 writes data into only one of the cache memories 134, and when the first PCIe_Port 73 determines to perform the dual-writing, the first NTB_Port 1322 writes data into one of the cache memories 134 while writing the data into the other one of the cache memories 134 via the other one of the CPUs 132.