Abstract: A first storage system of a remote copy system includes a data volume, a journal volume, and a storage controller. When an operation is received from a first server system, based on the operation, the storage controller executes any of a work of storing the update content by the operation in the journal volume or a work of executing the operation when the operation is received.

Abstract: In a storage system, attributes of nodes are specified as first attribute nodes and second attribute nodes, the I/O processing in the nodes is executed as a plurality of processes including front-end I/O processing executed by any of the first attribute nodes and back-end I/O processing executed by the first and second attribute nodes having a storage device that stores data relating to the I/O processing.

Abstract: A storage system and storage control method are provided in which a plurality of volumes to be processed by a storage control unit are distributed and evacuated in a normal storage control unit without recovering redundancy of the storage control unit having decreased redundancy, and the storage control unit itself having the decreased redundancy is deleted after the evacuating is completed, and thus reservation information processing resources for guaranteeing recoverability of the redundancy become unnecessary.

Abstract: A storage system and storage control method are provided in which a plurality of volumes to be processed by a storage control unit are distributed and evacuated in a normal storage control unit without recovering redundancy of the storage control unit having decreased redundancy, and the storage control unit itself having the decreased redundancy is deleted after the evacuating is completed, and thus reservation information processing resources for guaranteeing recoverability of the redundancy become unnecessary.

Abstract: A computer system includes a management computer, a first storage apparatus, and a second storage apparatus. A first logical device of the first storage apparatus and a second logical device of the second storage apparatus constitute a remote copy pair. The second logical device and a third logical device of the second storage apparatus constitute a copy pair. The second logical device and the third logical device have virtual IDs to be recognized by an issuer of an I/O request. The second storage apparatus interchanges the virtual IDs of the third logical device and the second logical device with reception of a command from the management computer as a trigger during processing of the I/O request from the issuer of the I/O request to the third logical device, thereby switching an access destination of the issuer of the I/O request from the third logical device to the second logical device.

Abstract: An information system connected to hosts and an information processing system manages a second ALU connected to the hosts via a second logical path, and second SLUs for receiving I/O requests from the hosts via the second logical path. A processor manages a first ALU connected to the hosts via a first logical path and first SLUs that receive I/O requests from the hosts via the first logical path, and builds up a first group including the first SLUs. A first SLU and a second SLU compose an HA pair, and the HA pair is provided to the hosts as one volume. The processor evaluates the state of the first logical path based on the pair state of the first SLU that composes the HA pair included in the first group so priorities with which the hosts issue I/Os to the first logical path can be determined.

Abstract: In a multi-node storage system, a node's capacity has an upper limit, and capacities provided by nodes are smaller than a capacity of a global pool. A volume having a capacity larger than the capacity of one node is created by the node. A write error occurs when an amount of data larger than the capacity of the node is written. A storage system reduces the frequency of such a write error. A global pool is based on a plurality of local pools of a plurality of storage nodes that constitute a node group. In any of the storage nodes, a capacity relationship is maintained where a used capacity of a volume created by the storage node is equal to or less than an available capacity of a local pool of the storage node. A storage management unit manages the node group and selects the storage node.

Abstract: According to one embodiment, a storage control method is provided in which a plurality of volumes to be processed by a storage control unit are distributed and evacuated in a normal storage control unit without recovering redundancy of the storage control unit having decreased redundancy, and the storage control unit itself having the decreased redundancy is deleted after the evacuating is completed, and thus reservation information processing resources for guaranteeing recoverability of the redundancy become unnecessary and use efficiency of a physical server is improved.

Abstract: A storage system includes a plurality of physical drives and a storage controller connected to the plurality of physical drives to provide one or more volumes. Two or more volume addresses, which are two or more logical addresses, belong to each of the one or more volumes. When copy target data, which is data to be copied, is copied in a volume or between volumes, the storage controller (A) determines whether a copy destination physical drive, which is a physical drive corresponding to a copy destination volume address, is identical to a copy source physical drive which is the destination physical drive corresponding to a copy source volume address, and (B) shifts a storage position of the copy target data such that the copy destination physical drive becomes a physical drive identical to the copy source physical drive if a determination result of (A) is false.

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: An instruction to associate a second logical volume with a second virtual storage, which is a migration destination of a first virtual storage that provides a first logical volume, is transmitted. The first virtual storage is a virtual storage to which a virtual resource provided by a virtual managing unit is allocated. A copy instruction, which is an instruction to copy data from either one of the first logical volume and a copy source logical volume of the first logical volume to the second logical volume is transmitted. When copy completion, which is completion of the data copy to the second logical volume, is detected, an erasing instruction, which is an instruction to erase the first virtual storage, is transmitted to the virtual managing unit.

Abstract: Saving a capacity of an on-premises storage apparatus, a high access performance of the on-premises storage apparatus, and resuming an operation quickly and accurately by using data on a cloud when a resource in the on-premises fails are achieved. A processor provides a first volume which is a virtual volume, and configures a copy pair of the first volume and a second volume provided from another storage system. Write data to the first volume is transferred to the second volume via a network, based on the copy pair. The processor writes to the memory a part of data written to the second volume, and writes to the storage device the data written to the memory.

Abstract: Saving a capacity of an on-premises storage apparatus, a high access performance of the on-premises storage apparatus, and resuming an operation quickly and accurately by using data on a cloud when a resource in the on-premises fails are achieved. A processor provides a first volume which is a virtual volume, and configures a copy pair of the first volume and a second volume provided from another storage system. Write data to the first volume is transferred to the second volume via a network, based on the copy pair. The processor writes to the memory a part of data written to the second volume, and writes to the storage device the data written to the memory.

Abstract: A method for restoring lost data due to a failure of a storage drive is provided, including: selecting a first logical area of a first storage drive that is failed; specifying a first logical area line that includes the first logical area and logical area blocks of a different storage drive and stores a data set having a redundant configuration capable of restoring lost internal data; selecting, from the first logical area line, one or more second logical areas to be accessed for restoring data of the first logical area; and for each of one or more second storage drives that provides the one or more second logical areas respectively, issuing a data storage information request inquiring whether valid data is stored after designating the second logical areas.

Abstract: A method for restoring lost data in a failed storage drive includes: detecting a trouble in a storage drive in a first RAID group of a first RAID type; in each of striped lines including host data which is lost due to a failure of the storage drive, restoring the host data, in the first RAID group; forming data of a striped line of a second RAID type from host data of a striped line of the first RAID group, the number of strips of the second RAID type being smaller than the number of strips of the first RAID type; configuring a second RAID group of the second RAID type by a storage drive included in the first RAID group excluding the failed storage drive; and storing data of a striped line of the second RAID type in the second RAID group.

Abstract: An information system connected to hosts and an information processing system manages a second ALU connected to the hosts via a second logical path, and second SLUs for receiving I/O requests from the hosts via the second logical path. A processor manages a first ALU connected to the hosts via a first logical path and first SLUs that receive I/O requests from the hosts via the first logical path, and builds up a first group including the first SLUs. A first SLU and a second SLU compose an HA pair, and the HA pair is provided to the hosts as one volume. The processor evaluates the state of the first logical path based on the pair state of the first SLU that composes the HA pair included in the first group so priorities with which the hosts issue I/Os to the first logical path can be determined.

Abstract: A computer system includes a management computer, a first storage apparatus, and a second storage apparatus. A first logical device of the first storage apparatus and a second logical device of the second storage apparatus constitute a remote copy pair. The second logical device and a third logical device of the second storage apparatus constitute a copy pair. The second logical device and the third logical device have virtual IDs to be recognized by an issuer of an I/O request. The second storage apparatus interchanges the virtual IDs of the third logical device and the second logical device with reception of a command from the management computer as a trigger during processing of the I/O request from the issuer of the I/O request to the third logical device, thereby switching an access destination of the issuer of the I/O request from the third logical device to the second logical device.

Abstract: A first storage system manages a first volume, with a first internal volume identifier, and to provide the first volume with a given first virtual volume identifier to a server. A second storage system manages a second volume, with a second internal volume identifier, and to provide the second volume with the given first virtual volume identifier to the server. A third storage system manages a third volume. The first storage system manages a first copy pair between the first volume and the third volume with a first internal copy identifier, and to provide a first copy pair with a given virtual copy pair identifier to the server. The second storage system manages a second copy pair between the second volume and the third volume with a second internal copy identifier, and to provide a second copy pair with the given virtual copy pair identifier to the server.

Abstract: A computer device including a node having a storage device having a plurality of first internal address spaces, a cache memory, and a processor may be provided. The processor may provide a virtual volume. The virtual volume may have a plurality of virtual address spaces including first virtual address spaces corresponding to the plurality of first internal address spaces. The processor may cache data of a virtual address space in a first cache space of the cache memory by associating the virtual address space with the first cache space. Further, the processor may cache data of a first internal address space of the first internal address spaces in a second cache space of the cache memory by associating the first internal address space with the second cache space.

Abstract: Example implementations described herein are directed to addressing potential decreases in performance for a storage system coupled to a server. In a first example implementation, systems and methods are directed to addressing potential performance issues for storage tiering and the storage I/O control. In a second example implementation, systems and methods are directed to addressing potential performance issues for storage tiering and de-duplication.