Abstract: First information representing a plurality of snapshot acquisition time points of the data storage device, journal management data which are second information including the time point at which data are written to the data storage device and the size of the journal for writing the data, and third information representing a plurality of recovery points are acquired. The total transfer data size of one or more data to be transferred in order to recover the data group of the data storage device at the recovery point is calculated for each recovery point on the basis of the first information, journal management data, and third information. A display screen that visualizes the correspondence relationship between the respective recovery points and respective recovery load information representing a recovery load that is expressed on the basis of the total transfer data size calculated for the respective recovery points is displayed.

Abstract: There is disclosed a data storage system used in a computer environment where there are plural host computers and plural storage array controllers. When a remote copy is made while assuring the order of writing across plural storage array controllers, one of the host computers gains copy information about all the storage array controllers associated with the remote copy as a representative. The representative one of the storage array controllers collects and stores copy statuses which are individually managed by the storage array controllers for which a remote copy is made. The host computer gains the copy statuses from the representative controller using an instruction to gain the copy statuses.

Abstract: A CPU 11 executes a management program B (Pb), from a management program A (Pa) receives authentication information, a request, and a program ID, and determines whether the authentication information is correct. If the authentication information is correct, the CPU 11 acquires the execution authority information of the authenticated user, compares the received program ID with the program ID including in the acquired execution authority information, and determines whether execution authority corresponding to the received program ID is defined. If the CPU 11 determines that execution authority corresponding to the received program ID is defined, it established the defined execution authority as the execution authority for the management program B (Pb).

Abstract: This storage system modifies the migration plan in accordance with the state of the migration destination when a plurality of volumes are migrated all at once. Migration-source volumes are migrated collectively to volumes inside the migration-destination storage apparatus. The user can make settings related to migration-source volumes and migration-destination volumes in a migration plan, and can establish a mid-process control plan for modifying the migration plan in the middle of processing. If a failure occurs in the migration-destination storage apparatus subsequent to the commencement of data migration processing, a processing method controller either cancels or temporarily halts the data migration processing, or changes the migration destination, on the basis of the mid-process control plan. When changing the migration destination, a previously selected alternate storage apparatus is selected as the new migration-destination storage apparatus.

Abstract: Transfer of data and replication of data among several storage devices are executed without imposing a load on the computer connected to the storage system. For example, a first host computer monitors usage rates of transfer groups TG11, TG12 and physical path usage rate on a storage device interconnect physical path 50, and when either a usage rate or physical path usage rate goes above a predetermined value, issues to the first storage device 20 an instruction to allocate a reserved volume R11, R12. The first host adaptor 21 receiving the reserved volume R11, R12 allocation request allocates reserved volume R11 to transfer group TG1, whereby a virtual transfer volume is formed by transfer volume T11 and the reserved volume R11 allocated thereto. Capacity of the virtual transfer volume is increased by the equivalent of the reserved volume R11 capacity, so that additional transfer frames may be stored.

Abstract: An aspect of the present invention relates to a magnetic recording medium comprising a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the binder of the magnetic layer is a mixture of a vinyl chloride copolymer, polyurethane resin, and polyisocyanate, the polyurethane resin having a glass transition temperature ranging from 90 to 130° C. and a storage elastic modulus at 80° C. ranging from 2.5 to 5.0 GPa, the nonmagnetic layer is a radiation-cured layer formed by curing with radiation a radiation-curable composition comprising a nonmagnetic powder and a binder component, the binder component comprising a radiation-curable vinyl chloride copolymer and a radiation-curable polyurethane resin, and the radiation-curable vinyl chloride copolymer and radiation-curable polyurethane resin both have glass transition temperatures ranging from 30 to 100° C.

Abstract: When migrating data stored in a storage region assigned to a volume to another storage region, the connection status of the host computer and volume is confirmed. When the host computer and volume are connected, the maximum capacity of the volume requested by the host computer is reserved so that it is exclusively secured in another storage region to which data is to be migrated, and when the host computer and volume are not connected, the current capacity of the volume is reserved so that it is exclusively secured in another storage region.

Abstract: This storage system modifies the migration plan in accordance with the state of the migration destination when a plurality of volumes are migrated all at once. Migration-source volumes are migrated collectively to volumes inside the migration-destination storage apparatus. The user can make settings related to migration-source volumes and migration-destination volumes in a migration plan, and can establish a mid-process control plan for modifying the migration plan in the middle of processing. If a failure occurs in the migration-destination storage apparatus subsequent to the commencement of data migration processing, a processing method controller either cancels or temporarily halts the data migration processing, or changes the migration destination, on the basis of the mid-process control plan. When changing the migration destination, a previously selected alternate storage apparatus is selected as the new migration-destination storage apparatus.

Abstract: A CPU 11 executes a management program B (Pb), from a management program A (Pa) receives authentication information, a request, and a program ID, and determines whether the authentication information is correct. If the authentication information is correct, the CPU 11 acquires the execution authority information of the authenticated user, compares the received information, and determines whether execution authority corresponding to the received program ID is defined. If the CPU 11 determines that execution authority corresponding to the received program ID is defined, it established the defined execution authority as the execution authority for the management program B (Pb).

Abstract: A data storing system including: a first, second and third storage systems providing first, second and third logical volumes; wherein the first logical volume and the second logical volume forms a first replication pair which indicates the first logical volume is a replication source and the second logical volume is a replication destination, and the second logical volume and the third logical volume forms a second copy pair which indicates the second logical volume is the replication source and the third logical volume is the replication destination. The replication pairs may adopt differing possible pair statuses, which may affect consistency between such pairs.

Abstract: When migrating data stored in a storage region assigned to a volume to another storage region, the connection status of the host computer and volume is confirmed. When the host computer and volume are connected, the maximum capacity of the volume requested by the host computer is reserved so that it is exclusively secured in another storage region to which data is to be migrated, and when the host computer and volume are not connected, the current capacity of the volume is reserved so that it is exclusively secured in another storage region.

Abstract: A computer system wherein, when a state of the primary host computer is in an active state, a data sent from the primary host computer to the first storage system is copied through a first copy route which includes a route from the first storage system to the second storage system and a route from the second storage system to the third storage system, wherein, if a failure occurs in the primary host computer and a state of the second host computer is to be in an active state, a data sent from the secondary host computer to the second storage system is copied through a second copy route which includes a route from the second storage system to the first storage system and a route from the first storage system to the third storage system.

Abstract: This storage system modifies the migration plan in accordance with the state of the migration destination when a plurality of volumes are migrated all at once. Migration-source volumes are migrated collectively to volumes inside the migration-destination storage apparatus. The user can make settings related to migration-source volumes and migration-destination volumes in a migration plan, and can establish a mid-process control plan for modifying the migration plan in the middle of processing. If a failure occurs in the migration-destination storage apparatus subsequent to the commencement of data migration processing, a processing method controller either cancels or temporarily halts the data migration processing, or changes the migration destination, on the basis of the mid-process control plan. When changing the migration destination, a previously selected alternate storage apparatus is selected as the new migration-destination storage apparatus.

Abstract: Provided is a storage medium management system, in which when the same data as that stored in a first physical storage area is stored in a second physical storage area, a storage system connected to a host computer compares the number of remaining rewritable times for the first physical storage area and the number of remaining rewritable times for the second physical storage area with each other. When the number of remaining rewritable times for the first physical storage area is less than the number of remaining rewritable times for the second physical storage area, the storage system writes data written from the host computer to the second physical storage area and copies the data written in the second physical storage area to the first physical storage area.

Abstract: This storage system modifies the migration plan in accordance with the state of the migration destination when a plurality of volumes are migrated all at once. Migration-source volumes are migrated collectively to volumes inside the migration-destination storage apparatus. The user can make settings related to migration-source volumes and migration-destination volumes in a migration plan, and can establish a mid-process control plan for modifying the migration plan in the middle of processing. If a failure occurs in the migration-destination storage apparatus subsequent to the commencement of data migration processing, a processing method controller either cancels or temporarily halts the data migration processing, or changes the migration destination, on the basis of the mid-process control plan. When changing the migration destination, a previously selected alternate storage apparatus is selected as the new migration-destination storage apparatus.

Abstract: Provided is a computer system including: a plurality of storage systems interconnected via a network, each storage system including a logical volume that stores data; and a management computer that is connected to the storage systems via the network and includes a port connected to the network and a processor connected to the port, wherein: a logical volume of a transfer source in a storage system of the data transfer source and a logical volume of a transfer destination in a storage system of the data transfer destination are decided; it is determined whether it is necessary or not to migrate a license of a program used for the logical volume of the transfer source from one of the plurality of storage systems to the storage system of the transfer destination; and when it is determined necessary to migrate the license, license information regarding the license to the storage system of the transfer destination is migrated.

Abstract: A computer system wherein, when a state of the primary host computer is in an active state, a data sent from the primary host computer to the first storage system is copied through a first copy route which includes a route from the first storage system to the second storage system and a route from the second storage system to the third storage system, wherein, if a failure occurs in the primary host computer and a state of the second host computer is to be in an active state, a data sent from the secondary host computer to the second storage system is copied through a second copy route which includes a route from the second storage system to the first storage system and a route from the first storage system to the third storage system.

Abstract: A computer system including: at least one host computer, a storage system for storing data used in the host computer, and a managing computer for managing storing the data in the storage system which are connected to each other with a network. The managing computer monitors the journal volume which is a storing destinations of the journal, in a case that the journal is stored in the journal volume in parallel, when it is detected that the storing destination of the journal changes from one of the groups into which the journal is just stored to another group, transmits an instruction to the storage system to change the storing destination of the journal to another group.

Abstract: A data storing system including: a first, second and third storage systems providing first, second and third logical volumes; wherein the first logical volume and the second logical volume forms a first replication pair which indicates the first logical volume is a replication source and the second logical volume is a replication destination, and the second logical volume and the third logical volume forms a second copy pair which indicates the second logical volume is the replication source and the third logical volume is the replication destination. The replication pairs may adopt differing possible pair statuses, which may affect consistency between such pairs.

Abstract: A computer system includes a host computer; a storage system for obtaining a snapshot, at a specific point in time, of a data volume, storing data written to the data volume after the specific point in time as a journal, and applying the journal to the snapshot for data recovery; and a management computer. In the computer system, the management computer instructs the storage system to determine whether data at a recovery point after a recovery point of the latest snapshot can be recovered within a specific period of time and to apply, if it has been determined that the data cannot be recovered within the specific period of time, a journal to the latest snapshot to update the latest snapshot to a new snapshot in such a manner that the data can be recovered within the specific period of time.