Abstract: A storage device receives an access request specifying one of one or more LDEVs (one or more logical volumes provided to one or more hosts) from one host. In response to the access request, the storage device accesses a page allocated to an access destination area of the LDEV among a plurality of pages (plurality of logical storage areas that can be allocated to one or more LDEVs). The storage device or a storage device management system identifies, based on management information including information representing a write status characteristic for each of the plurality of pages, a mark target page as a low-write frequency page where a certain number or more of writes have occurred during a certain period of time and checks the presence or absence of a ransomware attack possibility that the number of the mark target pages is equal to or greater than a threshold.

Abstract: In failover processing, a CPU restores data stored in a first volume to a second volume of a storage system, associates a unique ID of the first volume with the second volume, and stores the unique ID associated therewith in a memory. After the failover processing is completed, the CPU manages an update difference management bitmap indicating an updated content with respect to data stored in the second volume. The CPU transmits, in failback processing, update data updated after the failover processing among the data stored in the second volume to the first volume identified by the unique ID associated with the second volume based on the update difference management bitmap.

Abstract: It is possible to reduce analysis cost of a management system. The management system includes a CPU and manages one or more storage devices that provide, to a higher-level device, one or more volumes for inputting and outputting data. The CPU is configured to collect performance information of the volume from the storage device at a predetermined first time interval and detect a QoS violation of the performance information of the volume at a second time interval longer than the first time interval.

Abstract: A fuel cell separator material includes: a composite material containing electrically conductive particles and a binder resin; and soluble resin layers located on both sides of the composite material.

Abstract: A primary site includes a volume #1 that stores data, and copies first backup data that is backup data of data corresponding to the volume #1 to a secondary site. In the failover process of handing over the execution of a transaction process from the primary site to the secondary site, a cloud management node restores the volume #1 to a storage system as a volume #2 based on the first backup data copied to the secondary site. The cloud management node manages the first backup data, as second backup data, that is backup data of data corresponding to the volume #2.

Abstract: In a storage system that acquires data from a storage system via a network, in the storage system, a snapshot 108 with respect to a predetermined volume is managed, the storage system includes a CPU, and the CPU is configured to receive an acquisition instruction of data of a first snapshot of the predetermined volume and acquire at least a part of data of a difference between the first snapshot and a second snapshot from the storage system when data of the second snapshot of the predetermined volume is acquired.

Abstract: A management server stops a sub-server in advance and prepares a sub-storage that operates in response to a request from the sub-server at the time of transition at which a business process of using data stored in a regular storage is performed in the sub-server. The management server recovers data using recovery data stored in an object storage and stores the data in the sub-storage and starts the sub-server.

Abstract: In a storage system that is connected via networks to a cloud system, which provides an object store, and backs up backup data of a predetermined volume as an object to the object store, the storage system includes a processor, and the processor is configured to determine whether the storage system stores a snapshot associated with a volume at a first point in time to be restored, and restore the volume at the first point in time using the snapshot when it is determined that the storage system stores the snapshot.

Abstract: A network interface for a storage controller includes a processor and a memory that stores an instruction code to be executed by the processor. The processor executes protocol processing for transmitting and receiving packets via a network. The processor reproduces a first packet not received from the network, from a plurality of other received packets included in an error correction packet group same as that of the first packet.

Abstract: A backup-source storage system extracts, as a pattern, forwarding target data to a backup-destination storage system among data written to a storage apparatus through a volume. The backup-source storage system determines whether the extracted pattern matches with a registered pattern in the backup-source storage system. When a result of the determination is false, the backup-source storage system registers the extracted pattern and forwards the forwarding target data to the backup-destination storage system. When the result of the determination is true, the backup-source storage system does not forward the forwarding target data.

Abstract: In the disaster recovery system exemplified by the information processing system, the cloud management node manages the importance information indicating the importance placed on the performance of each application to be executed by the primary site in correspondence with the virtual computer for executing the application, determines the DR method applied to the virtual computer and the application by selection from multiple types of DR methods based on the importance information of the corresponding application for each of the virtual computers, and determines a content of a predetermined set item applied to transfer of data to be used by the virtual computer.

Abstract: Acquiring a snapshot of a logical volume involves generating snapshot-related catalog information including at least a location for storing actual data in the snapshot and a reference destination for identifying another snapshot in parent-child relation to the snapshot, and storing the actual data in the snapshot to the physical storage device and/or to the cloud service. In a case where at least one of a plurality of snapshots is to be designated and restored, catalog information is referenced to identify the storage location of the actual data and acquire the actual data stored in the physical storage device and the actual data not stored in the physical storage device from the cloud service.

Abstract: An object of the invention is to reduce a data transfer amount between storage systems. Provided is a storage system connected to another storage system via a network. The storage system includes a memory, a processor configured to execute a program stored in the memory, and a storage device. By executing the program, the processor provides a virtual volume, generates a plurality of snapshots at different timings for the virtual volume, holds a base snapshot, which is a reference snapshot among the plurality of snapshots, in the storage device, and transmits difference data indicating a difference between a snapshot generated after the base snapshot and a snapshot generated immediately before the snapshot to the other storage system and holds the difference data in the other storage system.

Abstract: The present invention is directed to realize a QoS function in the unit of a virtual volume group existing over a plurality of storage apparatuses. A management system of a storage system forms a virtual volume group by using a plurality of volumes provided by a plurality of storage apparatuses. In the virtual volume group, a QoS setting value including a data input/output amount is set. IO processing ability provided from each of the volumes to the virtual volume group is set so as to satisfy the QoS setting value. The management system sets the IC processing ability provided from each of the volumes to the virtual volume group on the basis of operation information of each of the volumes.

Abstract: The operational performance and the I/O performance of Snapshots in a storage system are balanced. In a storage system, meta information of data appended to a log structured area is composed of meta information of a first tier and meta information of a second tier which correlate location information of data in a logical volume and location information of data in the log structured area. When creating a snapshot of the logical volume, a data management unit creates, in the same meta information area as a replication source, a replication of the meta information of the first tier stored in a plurality of meta information areas assigned to a plurality of controllers. A data control unit accesses the data of the log structured area from the logical volume, and accesses the data of the log structured area from the snapshot.

Abstract: A primary storage system reads a plurality of journal data, and performs collective compression that is compression of data that is at least a part of the plurality of pieces of journal data in the plurality of journals and is larger than a size of one journal data. The collectively compressed data, which is a plurality of pieces of journal data subjected to collective compression, is a transfer target from the primary storage system to the secondary storage system. The journal is journal data and metadata including a write order of the journal data and associated with the journal data. The journal data is a copy of data written in the primary volume. The secondary storage system acquires a plurality of pieces of journal data by decompressing one or more pieces of collectively compressed data, and writes the plurality of pieces of journal data to the secondary volume.

Abstract: A processor repeatedly collects integrated management information related to a storage apparatus and including performance data indicating an operation status of the storage apparatus that stores data, and stores the performance data in an performance data temporary storage area. In addition, the processor analyzes the integrated management information, and determines the importance level indicating the degree of the influence of the performance data stored in the performance data temporary storage area on the analysis process of analyzing the performance data. The processor migrates the performance data stored in the performance data temporary storage area to one of the plurality of long-term storage areas having different characteristics based on the importance level.

Abstract: An administrative terminal receives designation of generation target data and of a generation destination storage device and identifies data similar to the target data. The terminal calculates a first predicted time expected for transmitting the target data from a storage device holding the target data to the generation destination storage device, and a second predicted time expected to be required for a second transmission process of transmitting the similar data from an object storage service to the generation destination storage device and of transmitting difference data between the target data and the similar data from the storage device holding the target data to the generation destination storage device. If the second predicted time is shorter than the first predicted time, the administrative terminal performs the second transmission process to transmit the similar data and the difference data to the generation destination storage device to generate the generation target data therein.

Abstract: A backup-source storage system extracts, as a pattern, forwarding target data to a backup-destination storage system among data written to a storage apparatus through a volume. The backup-source storage system determines whether the extracted pattern matches with a registered pattern in the backup-source storage system. When a result of the determination is false, the backup-source storage system registers the extracted pattern and forwards the forwarding target data to the backup-destination storage system. When the result of the determination is true, the backup-source storage system does not forward the forwarding target data.

Abstract: A computer management apparatus including a plurality of nodes, each including a processor and a storage device, and stores a countermeasure result table including a plurality of combinations of an anomaly detection rule, a countermeasure rule which is a countermeasure against an anomaly, and an effect indicating effectiveness of these rules, and the management apparatus includes: an anomaly detection unit that detects an anomaly of the computer system based on information acquired from the computer system and the anomaly detection rule; an execution unit that decides a countermeasure, at which the anomaly has been detected by the anomaly detection unit, on the basis of the detected anomaly, the countermeasure rule, and the effect indicating the effectiveness, and executes the decided countermeasure; and a countermeasure result information setting unit that evaluates a result of the countermeasure and records the result in the effect indicating the effectiveness in the countermeasure result table.