Abstract: A storage system having high performance and high reliability includes a non-volatile storage device, a storage controller configured to control data to be read and written from and to the storage device using a storage function; and a volatile memory. In the reading and writing, the storage controller generates a log and stores the log in a log memory, writes the log stored in the memory to the storage device, and collects a capacity of the storage area of the memory storing the log written to the storage device. In collecting a free area of the memory, the storage controller executes a base image saving method of writing in the storage device in units of storage areas having a plurality of logs and collecting a free area, and a garbage collection method of writing in the storage device in units of logs and collecting a free area.

Abstract: A storage apparatus includes: a first storage node having a primary volume from or to which data is read or written with a host; and a second storage node, in which each of the first storage node and the second storage node holds a same reference snapshot volume, and the first storage node and the second storage node manage a snapshot volume based on difference data between the reference snapshot volume and the snapshot volume.

Abstract: A data processing system includes: a processor implemented by a programmable device; and a processor processing unit connected to the processor. The processor includes a plurality of processing circuits configured to execute in parallel data processing commands provided from the processor processing unit, an error detection circuit configured to detect a soft error occurring in a processing circuit that is executing the data processing command, and a processing circuit selection unit configured to select a processing circuit to execute the data processing command from a plurality of processing circuits. The processing circuit selection unit specifies a processing circuit in which the soft error occurs based on a soft error detection result of the error detection circuit, and selects a processing circuit to execute the data processing command from the plurality of processing circuits, excluding the processing circuit in which the soft error occurs.

Abstract: Systems and methods utilize a policy-based approach to automate data backup processes in hybrid cloud environments, ensuring adherence to service level agreements (SLAs) such as recovery time objectives and recovery point objectives. A centralized management application oversees storage and network resources, by using a policy interpreter module to analyze and apply predefined, user-selected backup policies. This application identifies appropriate resources and data copy features using real-world data from databases containing information on storage volumes, network paths, and data replication technologies. The system then generates a configuration plan that is deployed across distributed storage systems, continuously monitoring and adjusting to maintain SLA compliance and optimize resource utilization, thereby reducing manual intervention and human error.

Abstract: Violation of a recovery requirement is prevented at the time of a failover to a secondary site in case of failure while suppressing cost on hardware of the secondary site in normal times. In a computer system including: a primary site storage system; a secondary site storage system; and a management device, the management device can change a resource of the secondary site storage system, and in the case where a failure occurs in the primary site, the management device performs a failover of making a corresponding secondary volume take over operation of the primary volume, controls so as to enhance a resource of the secondary site storage system, and controls the failover so that a secondary volume which starts operating by the failover before the enhancement of the resource and a secondary volume which starts operating by the failover after the enhancement of the resource exist.

Abstract: The present invention enables decision of a data migration destination to be carried out easily and appropriately. A storage system which supports migration of migration target data in a computer system including a plurality of storage systems includes a storage unit and a CPU, and the storage unit stores configuration information including a type and a redundancy method of each of the plurality of storage systems, and the CPU is configured to receive designation of information that can identify a redundancy level of the migration target data and a type of a migration destination storage system, and to determine a storage system to which the migration target data is to be migrated, on the basis of the redundancy level of the migration target data and the type.

Abstract: When a plurality of pieces of encrypted data of the same content encrypted with the same encryption key are present in a pool volume, a storage system executes deduplication by leaving any of the encrypted data and releasing other encrypted data and associating an address of a virtual volume corresponding to the released encrypted data with the remaining encrypted data, and when unencrypted data having same content as the encrypted data is present in the pool volume, the storage system executes deduplication by releasing the encrypted data while leaving the unencrypted data, and associating an address of a virtual volume corresponding to the released encrypted data with the unencrypted data.

Abstract: A management target system includes a storage cluster including a plurality of storage nodes and a database cluster including a plurality of database nodes. The plurality of storage nodes include a plurality of active storage nodes arranged in a first zone and a plurality of standby storage nodes arranged in a second zone. The plurality of database nodes include a plurality of active database nodes arranged in the first zone and a plurality of standby database nodes arranged in the second zone. A management system detects anomaly in the first zone, determines which of a zone failure, a failure of only the storage node, and a failure of only the database node corresponds to a cause of the anomaly, and creates an instruction for operating the management target system according to a result of the determination.

Abstract: A first storage system stores data related to execution of a first server in a logical volume, and transmits the data stored in the logical volume to a second storage system. The second storage system provides a virtual volume to the second server, and stores the data received from the first storage system in the virtual volume. The second storage system executes a process by using data stored in the virtual volume at each execution timing. Then, the second storage system determines whether the data stored in the virtual volume is left in the virtual volume or is discarded based on the presence or absence of an access and the type of access, which are access statuses to the data at each execution timing, and discards the data determined to be discarded from the virtual volume.

Abstract: In order to solve the above problem, when the power saving mode is applied, the journal data is recorded in the log buffer in a narrower range than in a normal mode. Then, when a controller failure occurs at the time of applying the power saving mode, the controller that has been stopped is restarted, and at that time, data is read from the log buffer in the narrow range and restoration processing is performed. As a result, it is possible to reduce the power consumption of the storage system and shorten the restoration time.

Abstract: A storage device includes a host interface that communicates with a host and a processor. The processor executes an asynchronous process that is a process executed asynchronously with an access process that is a process related to reading and writing of data via the host interface and is a process on data derived from data received via the host interface, selects an operation mode of one or more hardware devices of the storage device from modes including a normal mode and a power saving mode in which a power consumption amount is less than a power consumption amount of the normal mode. The processor restricts the asynchronous process and maintains the power saving mode when the operation mode is the power saving mode.

Abstract: To shorten the duration affecting the performance of a storage system, even when a consistency group including multiple journal groups is used, a first storage system performs journaling at least when data is written to a data volume. It defines at least one consistency group comprising several journal groups across multiple storage nodes. When the usage rate of any journal volume within these consistency groups exceeds a predetermined threshold, the system traces to identify the specific journal group to which the journal volume belongs and determines the associated consistency group. Subsequently, it identifies at least one journal volume within this consistency group and expands its capacity in bulk.

Abstract: A backup/restore control system controls to create backup data of a volume to be backed up of a first storage system and store the backup data in a data store, and controls to store I/O statistical information related to I/O of the volume created by the first storage system while associating the backup data and the statistical information. In a case where the volume is restored using the backup data, the backup/restore control system selects a second storage system to be a restore destination of a first volume from a plurality of storage systems based on I/O statistical information, and controls to restore the volume to be restored from the backup data to the second storage system.

Abstract: A nonvolatile storage device has a permanent area and a cache data log area. A memory has a cache data area. A processor stores data related to a write request in the cache data area, stores a log header having a sequence number and data stored in the memory in a cache data log area, responds to a write request source, registers a sequence number of the log header in an invalidation table, destages the data stored in the memory to the permanent area, creates a log header having a sequence number, registers the sequence number in the invalidation table, and when the cache data log area is collected by a garbage collection method, deletes a log header having a sequence number older than the sequence number registered in the invalidation table and corresponding data from the cache data log area to release the storage area.

Abstract: Provided is a control device which extracts summary information regarding an outline of a predetermined volume from volume mapping information regarding a configuration of a predetermined volume at a time point when each of backup images of a plurality of generations is created, and verifies whether a volume configuration based on a backup image of a specific generation corresponding to specific volume mapping information of a predetermined volume corresponding to a specific backup generation selected from the backup images of the plurality of generations on the basis of the summary information matches a volume configuration based on a current backup image of the predetermined volume, and when both the volume configurations match each other as a result of the verification, verifies and recovers backup data on the basis of the backup image of the specific generation.

Abstract: When execution of a write-back operation is selected, a storage system stores, in a cache area, data for which a write request is issued from a higher-level apparatus, stores an updated content of the cache area in a cache log storage area, and then writes the data to a data storage area. On the other hand, when execution of a write-through operation is selected, the storage system does not execute storage into the cache area and the cache log storage area, stores an updated content of the data storage area in a write log storage area, and then writes the data to the data storage area.

Abstract: In a storage system including a plurality of storage nodes and a plurality of storage devices that provide storage areas to the storage nodes, a cluster control unit that has detected occurrence of a failure in another storage node requests an external control device to execute a detach process of detaching a storage device allocated to a failure storage node from the failure storage node and an attach process of allocating the storage device to an alternative storage node. Then, the alternative cluster control unit restores, based on a log stored in a storage device allocated to a storage node in which a most recent failure has occurred among the storage nodes belonging to the same redundancy group as a failure storage control unit of the failure storage node, storage content of a memory of the alternative storage node.

Abstract: A storage system includes a plurality of drive slots into which a drive storing data is insertable and one or more controllers including a processor. At least a part of the plurality of drive slots is a common slot into which a first device of a different type from the drive is insertable. A port of the controller at a connection destination of the drive from the common slot and a port of the controller at a connection destination of the first device from the common slot are different.

Abstract: In each of a plurality of nodes constituting a storage system, when there is data to be stored in a segment allocated from a cache, the node determines, for the segment, whether redundancy (redundant data of the data in the segment is transferred to another node) and whether non-volatilization (data in the segment is stored in a non-volatile area) are required according to a type of the data, and controls, based on a result of the determination, whether to perform the redundancy of data in the segment and whether to perform the non-volatilization of data in the segment.

Abstract: To provide a management apparatus, a management method, and a storage system in which even in an environment where a connection speed and an amount of data written from a host are uncertain, remote copy can be stably operated. A management apparatus includes a processor and manages a plurality of storage apparatuses communicating with one another via a network and having a respective volume. In the management apparatus, a remote copy transferred from a replication source volume of a plurality of volumes to a replication destination volume via the network and duplicated is set for a combination of a plurality of replication source volumes and replication destination volumes. The management apparatus monitors a replication delay time, which a time required for duplicating a remote copy, and exercises control to limit an amount of transferred data of other remote copies based on the replication delay time.