Abstract: A data-storage-destination environment-determination module set determines any of a plurality of storage environments as a storage destination environment for storing data, based on a used-data table set about the characteristics of data and the storage environments. The data migration module transmits the data to the storage destination environment.

Abstract: A data-storage-destination environment-determination module set determines any of a plurality of storage environments as a storage destination environment for storing data, based on a used-data table set about the characteristics of data and the storage environments. The data migration module transmits the data to the storage destination environment.

Abstract: A storage arrangement including: a first storage system having one or more first logical storage devices and a second storage system having one or more second logical storage devices, configured to: a) determine whether two or more identical contents hash values are contained in a plurality of contents hash values of said plurality of files; and b) change an access destination of a first file corresponding to a first contents hash value from among said two or more identical contents hash values, to a position of a second file corresponding to a second contents hash value if there are said two or more identical contents hash values, c) do not migrate said first file to said second storage system, and migrate said second file to said second storage system to store in any of said one or more second logical storage devices.

Abstract: A storage system including: a storage apparatus including a plurality of storage devices on which a plurality of logical units is configured and a first controller that controls accesses to the plurality of logical units; and a file server coupled to said storage apparatus and including a second controller and a memory storing management information which indicates relationships between each of the plurality of logical units and each of a plurality of indicators; wherein the first controller, in response to a request to create a first folder with a first indicator, creates the folder on one or more first logical units included in the plurality of logical units, the one or more first logical units related to the first indicator.

Abstract: Provided is a storage system comprising a plurality of storage subsystem in which each storage subsystem includes a storage resource and controls access from a host system to the storage resource of the storage subsystem. The storage system is capable of simply and promptly changing the operation of a storage subsystem between operating as a stand-alone system and virtualize the plurality of storage subsystems logically into one virtual storage subsystem and execute a first mode of causing a host system to recognize the virtual storage subsystem. The storage is further able to execute a second mode of causing the host system to recognize the plurality of storage subsystems respectively as separate storage subsystems.

Abstract: In a storage apparatus and its control method including multiple first virtual volumes to be provided to a host system and multiple pools each having a memory capacity, and equipped with a function of dynamically allocating a storage area to the first virtual volumes from the pools associated with the first virtual volumes in accordance with the usage status of the first virtual volumes, the unused capacity in each of the pools is managed, and, when the unused capacity of one of the pools falls below a predetermined threshold value, a part of the unused capacity of the other pools is allocated to the one pool. It is thereby possible to realize a highly reliable storage apparatus and its control method.

Abstract: A storage arrangement including: a first storage system having one or more first logical storage devices and a second storage system having one or more second logical storage devices, configured to: a) determine whether two or more identical contents hash values are contained in a plurality of contents hash values of said plurality of files; and b) change an access destination of a first file corresponding to a first contents hash value from among said two or more identical contents hash values, to a position of a second file corresponding to a second contents hash value if there are said two or more identical contents hash values, c) do not migrate said first file to said second storage system, and migrate said second file to said second storage system to store in any of said one or more second logical storage devices.

Abstract: A storage system including: a storage apparatus including a plurality of storage devices on which a plurality of logical units is configured and a first controller that controls accesses to the plurality of logical units; and a file server coupled to said storage apparatus and including a second controller and a memory storing management information which indicates relationships between each of the plurality of logical units and each of a plurality of indicators; wherein the first controller, in response to a request to create a first folder with a first indicator, creates the folder on one or more first logical units included in the plurality of logical units, the one or more first logical units related to the first indicator.

Abstract: Arrangements including a duplication determination unit that determines whether identical contents intrinsic values are contained in a plurality of contents intrinsic values; a change control unit that changes an access destination of a first file corresponding to a first contents intrinsic value from identical contents intrinsic values, to a position having stored therein a second file corresponding to a second contents intrinsic value from among these identical contents intrinsic values when there are identical contents intrinsic values; and, a migration execution unit which, when the migration execution unit migrates data stored in files stored in one or more first logical storage devices to one or more second logical storage devices, does not migrate first data of the first file to any of the one or more second logical storage devices, and migrates second data of the second file to any of the one or more second logical storage devices.

Abstract: There is provided a storage system including a file server connecting to a computer over a network and a storage apparatus connecting to the file server connecting over the network, wherein the file server includes a first controller, the storage apparatus includes multiple storage devices having multiple storage areas and a second controller that controls accesses to the multiple storage areas, each of the multiple storage areas has at least one power saving mode among multiple power saving modes with different shift times from the power saving modes to a ready mode, the first controller, in response to the reception of data from the computer, sets an indicator relating to the performance of response to an access from the computer to the data and refers to the indicator of the data and selects a first storage area having the power saving mode satisfying the indicator, and the second controller stores the data to the first storage area.

Abstract: The storage control apparatus of the present invention saves a table for managing a virtual volume in a pool and keeps the state of the table in the latest state. A first dynamic mapping table (DMT) that manages a first virtual volume is saved in a first pool. Upon receipt of a write command relating to an unused virtual slot from a write command issuing device, a first virtual volume control unit assigns an unused real slot in the first pool to the virtual slot and updates the first DMT. The first virtual volume control unit discriminates the validity of the received data and, in cases where “0” data are received, releases the assigned real slot, updates the first DMT once again, and discards the received data. In cases where the received data are valid data, de-staging is performed following a DMT update.

Abstract: A storage device is provided with: a first management section that manages a storage area provided by one or more hard disk drives on a basis of a predetermined unit created using one or more parameters; a second management section that manages, on a basis of a pool configured by at least one or more of the units, a management policy about the capacity of the pools and a threshold value of the storage capacity of the pools; a power supply control section that controls each of the hard disk drives of the unit under the management of the first management section to be in either a first turn-ON state or a second turn-ON state with a low power consumption; and a control section that selects, when the storage capacity of any of the pools exceeds the threshold value, the management policy of the pools, and any of the managed parameters considered optimum to serve as the unit of the storage area, and after making the power supply control section to change the state of the hard disk drive of the selected unit from th

Abstract: In a storage apparatus and its control method including multiple first virtual volumes to be provided to a host system and multiple pools each having a memory capacity, and equipped with a function of dynamically allocating a storage area to the first virtual volumes from the pools associated with the first virtual volumes in accordance with the usage status of the first virtual volumes, the unused capacity in each of the pools is managed, and, when the unused capacity of one of the pools falls below a predetermined threshold value, a part of the unused capacity of the other pools is allocated to the one pool. It is thereby possible to realize a highly reliable storage apparatus and its control method.

Abstract: Arrangements including a duplication determination unit that determines whether identical contents intrinsic values are contained in a plurality of contents intrinsic values; a change control unit that changes an access destination of a first file corresponding to a first contents intrinsic value from identical contents intrinsic values, to a position having stored therein a second file corresponding to a second contents intrinsic value from among these identical contents intrinsic values when there are identical contents intrinsic values; and, a migration execution unit which, when the migration execution unit migrates data stored in files stored in one or more first logical storage devices to one or more second logical storage devices, does not migrate first data of the first file to any of the one or more second logical storage devices, and migrates second data of the second file to any of the one or more second logical storage devices.

Abstract: A method for controlling a storage system including a host computer, and a first and a second storage control apparatuses each receiving a data input/output request from the host computer and executing a data input/output process for a storage device in response to the request, comprises connecting a first communication path between the host computer and the first apparatus; connecting a second communication path between the first apparatus and the second apparatus; receiving by the first apparatus a first data input/output request from the host computer through the first path; when the first apparatus has judged that the first request is not for the first apparatus, transmitting by the first apparatus a second data input/output request corresponding to the first request, to the second apparatus through the second path; and by the second apparatus, receiving the second request and executing a data input/output process corresponding to the second request received.

Abstract: A plurality of contents intrinsic values that are values intrinsic to respective contents of a plurality of files stored in one or more first storage devices are calculated. Whether two or more identical contents intrinsic values are contained among the plurality of contents intrinsic values is determined. When two or more identical contents intrinsic values are present, an access destination of a first file corresponding to a first contents intrinsic value from among these two or more contents intrinsic values is changed to a position having stored therein a second file corresponding to a second contents intrinsic value from among these two or more contents intrinsic values.

Abstract: Data in a storage area to be returned from among storage areas of a storage system is deleted without fail, thereby ensuring data security. When a user's storage-on-demand management program 24 is activated in response to a return request from user A's console terminal 18, the return request is transferred via a communication network 14 to a server 16, and a provider's storage on-demand management program 30 makes a request to a storage management program 32 for volume initialization and data deletion. After the storage management program 32 issues a volume initialization command after receiving the above request, a control program 76 is activated to initialize the designated volume. Subsequently, the user A's volume access right is deleted by the processing executed by the provider's storage-on-demand management program 30, and it is reported to the console terminal 18 that the volume initialization and the volume separation have been conducted.

Abstract: A computer system including: disk array system to cause a snapshot corresponding to the selected backup time accessible with the specific address to which the computer can access; wherein if the snapshot corresponding to the selected backup time is associated with the specific address to which the computer cannot access, then the disk array system making the snapshot accessible with an address to which the computer can access; and wherein the snapshot relates to differential data between initial backup data and actual backup data at the selected backup time, thereby an acquisition time of the snapshot is different than the selected backup time corresponding to the specific address that can be accessed initially by the computer.

Abstract: A storage device is provided with: a first management section that manages a storage area provided by one or more hard disk drives on a basis of a predetermined unit created using one or more parameters; a second management section that manages, on a basis of a pool configured by at least one or more of the units, a management policy about the capacity of the pools and a threshold value of the storage capacity of the pools; a power supply control section that controls each of the hard disk drives of the unit under the management of the first management section to be in either a first turn-ON state or a second turn-ON state with a low power consumption; and a control section that selects, when the storage capacity of any of the pools exceeds the threshold value, the management policy of the pools, and any of the managed parameters considered optimum to serve as the unit of the storage area, and after making the power supply control section to change the state of the hard disk drive of the selected unit from th

Abstract: There is provided a storage system including a file server connecting to a computer over a network and a storage apparatus connecting to the file server connecting over the network, wherein the file server includes a first controller, the storage apparatus includes multiple storage devices having multiple storage areas and a second controller that controls accesses to the multiple storage areas, each of the multiple storage areas has at least one power saving mode among multiple power saving modes with different shift times from the power saving modes to a ready mode, the first controller, in response to the reception of data from the computer, sets an indicator relating to the performance of response to an access from the computer to the data and refers to the indicator of the data and selects a first storage area having the power saving mode satisfying the indicator, and the second controller stores the data to the first storage area.