Abstract: Availability of a cluster storage system to data I/O from a client apparatus is improved. In a cluster storage system including a plurality of nodes and a cluster network, each of the nodes can store data in units of volumes, the cluster storage system includes a plurality of volume groups made up of a plurality of volumes stored in the plurality of nodes, and the nodes synchronize the volumes of the same volume group via a cluster network. When communication in the cluster network is split, the node enables to access at least one volume belonging to a split volume group in which synchronization of volumes is enabled from the client apparatus.

Abstract: A computer system comprises a first computer having a first processing performed processing by using a storage region; a second computer having a second processing unit provided the storage region, manage a first port for communication with the first processing unit, and execute a processing request to the storage region; and a third computer having a third processing unit manage a second port for communication with the first processing unit. The third processing unit holds port management information for managing a correspondence relationship of the first port and the second port, selects the first port for redirecting on the basis of the port management information in a case of receiving a connection request; and transmits a response notifying the first port for redirecting to the first processing unit.

Abstract: An object of the present invention is to improve the usage efficiency of a storage extent in a storage system using the Allocation on Use (AOU) technique. A controller in the storage system allocates a storage extent in an actual volume to an extent in a virtual volume accessed by a host computer, detects any decrease in necessity for maintaining that allocation, and cancels the allocation of the storage extent in the actual volume to the extent in the virtual volume based on the detection result.

Abstract: An object of the present invention is to improve the usage efficiency of a storage extent in a storage system using the Allocation on Use (AOU) technique. A controller in the storage system allocates a storage extent in an actual volume to an extent in a virtual volume accessed by a host computer, detects any decrease in necessity for maintaining that allocation, and cancels the allocation of the storage extent in the actual volume to the extent in the virtual volume based on the detection result.

Abstract: An object of the present invention is to improve the usage efficiency of a storage extent in a storage system using the Allocation on Use (AOU) technique. A controller in the storage system allocates a storage extent in an actual volume to an extent in a virtual volume accessed by a host computer, detects any decrease in necessity for maintaining that allocation, and cancels the allocation of the storage extent in the actual volume to the extent in the virtual volume based on the detection result.

Abstract: Provided is an information processing system including a plurality of nodes 3 and a plurality of storages 4 coupled subordinately to each of the nodes 3, each of the nodes 3 functioning as a virtual file system that provides a client 2 with storage regions of each of the storages 4 as a single namespace. This information processing system is further provided with a backup node 10 and a backup storage 11 coupled subordinately to the backup node 10. The backup node 10 synchronizes and holds location information (file management table 33) held by each of the nodes 3. Then, the backup node 10 creates a backup file, and stores the backup file in the backup storage 11 by accessing a location identified by the location information (file management table 43) synchronized and held by the backup node 10 itself to acquire a file.

Abstract: An object of the present invention is to improve the usage efficiency of a storage extent in a storage system using the Allocation on Use (AOU) technique. A controller in the storage system allocates a storage extent in an actual volume to an extent in a virtual volume accessed by a host computer, detects any decrease in necessity for maintaining that allocation, and cancels the allocation of the storage extent in the actual volume to the extent in the virtual volume based on the detection result.

Abstract: An object of the present invention is to improve the usage efficiency of a storage extent in a storage system using the Allocation on Use (AOU) technique. A controller in the storage system allocates a storage extent in an actual volume to an extent in a virtual volume accessed by a host computer, detects any decrease in necessity for maintaining that allocation, and cancels the allocation of the storage extent in the actual volume to the extent in the virtual volume based on the detection result.

Abstract: A technique that can efficiently achieve migration of a configuration and data between storage units with varying constructions of configuration information and that can alleviate burdens of personal operation by an administrator, etc. With the configuration information of each storage unit controlled by the storage control server, based on each piece of configuration information, the transfer-source configuration information is converted into information necessary for establishing the logical partition configuration of a storage unit which has the transfer-destination logical partition function. The information prepared by the conversion is transmitted to the transfer-destination storage unit and the configuration with the transfer-source logical configuration set as the transfer-destination logical partition is updated in the transfer-destination storage unit.

Abstract: An object of the present invention is to improve the usage efficiency of a storage extent in a storage system using the AOU technique. A controller in the storage system allocates a storage extent in an actual volume to an extent in a virtual volume accessed by a host computer, detects any decrease in necessity for maintaining that allocation, and cancels the allocation of the storage extent in the actual volume to the extent in the virtual volume based on the detection result.

Abstract: Provided is a computer system having a host computer that requests the input and output of data in and from an actual storage volume, and a plurality of storage subsystems respectively having at least one or more virtual storage volumes. The virtual storage volumes of each of the plurality of storage subsystems are virtualizations of a common external volume. The host computer sets a certain logical path among a plurality of logical paths to be respectively connected to a plurality of virtual storage volumes formed by virtualizing the common external volume as an alternate path of another logical path.

Abstract: An object of the present invention is to improve the usage efficiency of a storage extent in a storage system using the Allocation on Use (AOU) technique. A controller in the storage system allocates a storage extent in an actual volume to an extent in a virtual volume accessed by a host computer, detects any decrease in necessity for maintaining that allocation, and cancels the allocation of the storage extent in the actual volume to the extent in the virtual volume based on the detection result.

Abstract: A storage system including a file migration server, a file migration client, and an LDEV migration engine. The file migration client displays on a management terminal a GUI for guiding a file migration. The file migration server, upon receipt of a file migration command to migrate a part of files stored in a source logical device to a destination logical device, migrates all of the files stored in the source logical device to the destination logical device without involving a change in directory path.

Abstract: A host and a storage system are connected via at least one intermediate device so as to be able to communicate. The storage system comprises a storage device, which makes it possible to store data. The host recognizes a logical path from this host to the storage device. In this case, a computer, which is able to read in and execute a computer program, carries out processing for specifying a plurality of physical paths, which exist between the host and the storage system; specifying to which physical path of the specified plurality of physical paths the logical path corresponds; and making the logical path correspond to the specified physical path.

Abstract: A method for displaying an access path between a virtual volume of a storage controller that has an external storage connecting function, and an external volume of an external storage system. By this method, port connection information about an access path defined between the virtual volume and the external volume is collected. A first network address for identifying an access port of the storage controller on the access path is collected. Also, a second network address for identifying an access port of the external storage system on the access path is collected. Moreover, identification information for identifying the external volume is collected. Finally, the network topology between the virtual volume and the external volume is displayed based on the port connection information, the first network address, the second network address, and the identification information.

Abstract: A method for grouping a plurality of storage resources provided by a storage system into storage groups. Storage management software obtains storage resource configuration information set for each of a number of logical partitions in the storage system and groups the storage resources into storage groups such that the storage resource group configuration individually set for the logical partitions in the storage system matches the group configuration of the storage resources constituting the storage groups.

Abstract: Provided is a load balancing system and method capable of balancing the load of an apparatus employing both the internal mirror copying function and external connection function. With this load balancing system and method for balancing the load of a first apparatus equipped with a first function that copies data of one logical device to another logical device paired among the logical devices set in itself, and a second function that virtualizes an external logical device and provides it to a host system, the first and second apparatuses are controlled for periodically detecting the load of the first apparatus, and the load of a second apparatus provided separately from the first apparatus and equipped with the first and second functions, respectively, and migrating the logical device that is not paired with the other logical device among the logical devices set in the first apparatus to the second apparatus when the load of the first apparatus is greater than the load of the second apparatus.

Abstract: There is provided a technique in which such a configuration as to include storage apparatuses on a plurality of sites can reduce a burden of operation/management of backup of data stored in the storage apparatuses. The configuration includes a information processing system on each site to be a backup target, and an information processing system for executing a backup process. Through control of a management server and a process for a backup server at a backup execution point, backup data of the data stored in the storage apparatus of the information processing system is converged into the storage apparatuses of the information processing systems by a process using a remote copying function and stored in the backup device. Then, instructions are given from the management server to the respective sites with synchronized timing, and convergence and storage of said backup data are executed by obtaining a temporal synchronization.

Abstract: A storage control device is equipped with a protection controller, and storage device management information, which is information that includes a plurality of different protection capability values respectively associated with a plurality of storage devices having different protection capabilities, is stored in a storage resource of the storage control device. The protection controller uses the storage device management information stored in the storage resource to store an electronic protection object in one or more of the plurality of storage devices so as to satisfy a required protection capability value, which is the protection capability required by the protection object.

Abstract: A cluster computing system includes an active system and a standby system connected via wire networks. The active system and the standby system each has a wireless communications apparatus, such that when all of the wire networks connecting the active system with the standby system are disconnected, the wireless communications apparatus of the active system reports the standby system of the failure of the active system using its wireless communications capability with the wireless communications apparatus of the standby system. The report includes the verification ID of the active system, and the standby system begins operation upon receiving a packet containing the verification ID.