Abstract: A data processing system includes a storage apparatus having a plurality of data storages and a processing control apparatus, the processing control apparatus is configured to: calculate hash information from data; and uniquely decide an arrangement destination of the data in the plurality of data storages according to the calculated hash information, and the storage apparatus is configured to: move specific data specified as a movement processing target among a plurality of pieces of stored data stored in the data storage from the arrangement destination of the specific data to a movement destination; and write information on a storage position of the specific data to the arrangement destination of the specific data after the movement.

Abstract: A control device includes a processor. The processor is configured to receive a write request to write content data. The processor is configured to divide the content data into leading first data and subsequent second data. The processor is configured to write the first data to a first storage resource in a first storage group among a plurality of storage groups having operating rates different from each other. The first storage group has a first operating rate higher than operating rates of any other storage groups. The processor is configured to write the second data to a second storage resource in a second storage group. The second storage group has a second operating rate lower than the first operating rate. The processor is configured to activate, in parallel with the writing of the first data, the second storage resource when the second storage resource is in a non-operating state.

Abstract: A control device includes a processor. The processor is configured to receive a write request to write content data. The processor is configured to divide the content data into leading first data and subsequent second data. The processor is configured to write the first data to a first storage resource in a first storage group among a plurality of storage groups having operating rates different from each other. The first storage group has a first operating rate higher than operating rates of any other storage groups. The processor is configured to write the second data to a second storage resource in a second storage group. The second storage group has a second operating rate lower than the first operating rate. The processor is configured to activate, in parallel with the writing of the first data, the second storage resource when the second storage resource is in a non-operating state.

Abstract: A method of controlling access from a virtual machine executed in a server device to a storage device, the method including acquiring a service level corresponding to a virtual machine identifier that identifies a virtual machine and is output from the virtual machine together with an input/output command by using the virtual machine identifier and by referring to a storage device that stores correspondence relationship between the virtual machine identifier and the service level and executing the input/output command from the virtual machine in accordance with the acquired service level in at least either the server device or the storage device.

Abstract: A storage management device includes: a memory; and a processor coupled to the memory. The processor executes a process including: managing a plurality of storages in a system in which a data storage destination is switched between a first storage and a second storage; first performing management to cause the first storage to hold data as master data and cause the second storage to hold data equivalent to the master data as backup data; and second performing management to cause the second storage to hold update data for the backup data held in the second storage independently from the backup data and cause a third storage different from the first storage and the second storage to duplicate the update data when the data storage destination is switched from the first storage to the second storage.

Abstract: A storage system in which a storage control apparatus writes data in each of divided areas defined by division of one or more storage areas in one or more storage devices, after encryption of the data with an encryption key unique to each divided area. When the storage control apparatus receives, from a management apparatus, designation of one or more of the divided areas allocated as one or more physical storage areas for a virtual storage area to be invalidated and an instruction to invalidate data stored in the one or more of the divided areas, the storage control apparatus invalidates one or more encryption keys associated with the designated one or more of the divided areas. In addition, the storage control apparatus may further overwrite at least part of the designated one or more of the divided areas with initialization data for data erasion.

Abstract: A method of controlling access from a virtual machine executed in a server device to a storage device, the method including acquiring a service level corresponding to a virtual machine identifier that identifies a virtual machine and is output from the virtual machine together with an input/output command by using the virtual machine identifier and by referring to a storage device that stores correspondence relationship between the virtual machine identifier and the service level and executing the input/output command from the virtual machine in accordance with the acquired service level in at least either the server device or the storage device.

Abstract: A storage system in which a storage control apparatus writes data in each of divided areas defined by division of one or more storage areas in one or more storage devices, after encryption of the data with an encryption key unique to each divided area. When the storage control apparatus receives, from a management apparatus, designation of one or more of the divided areas allocated as one or more physical storage areas for a virtual storage area to be invalidated and an instruction to invalidate data stored in the one or more of the divided areas, the storage control apparatus invalidates one or more encryption keys associated with the designated one or more of the divided areas. In addition, the storage control apparatus may further overwrite at least part of the designated one or more of the divided areas with initialization data for data erasion.

Abstract: In a storage system, a disk device performs recovery and transfers read data to a control device, and the control device judges the validity of the recovery to prevent a transfer of erroneous data. A control device read-accesses a disk device, and the disk device returns read data and a recovered read error response. A control device, at the time of an initial recovered read error, performs a retry of a similar command, and if an error does not occur for read commands including the retry read command, judges the data to be valid. Uncertain data (suspect data) upon occurrence of a recovered read error is restored through disk retry, and accurate read data can be transferred to the host.

Abstract: With respect to each head mounted on a hard disk, an area accessed by the head is obtained in advance and managed as disk information. Then, if a read error or a write error has occurred during operation, the corresponding head is identified on the basis of a logical block address at which the error has occurred. If a read error or a write error caused by the identified head has occurred multiple times, only data stored in an area accessed by the head is transferred to another hard disk. After the completion of the data transfer, the hard disk with the failed head and the other hard disk serving as the destination of the data transfer are used as hard disks constituting the same RAID array.

Abstract: With respect to each head mounted on a hard disk, an area accessed by the head is obtained in advance and managed as disk information. Then, if a read error or a write error has occurred during operation, the corresponding head is identified on the basis of a logical block address at which the error has occurred. If a read error or a write error caused by the identified head has occurred multiple times, only data stored in an area accessed by the head is transferred to another hard disk. After the completion of the data transfer, the hard disk with the failed head and the other hard disk serving as the destination of the data transfer are used as hard disks constituting the same RAID array.

Abstract: In a storage system, a disk device performs recovery and transfers read data to a control device, and the control device judges the validity of the recovery to prevent a transfer of erroneous data. A control device read-accesses a disk device, and the disk device returns read data and a recovered read error response. A control device, at the time of an initial recovered read error, performs a retry of a similar command, and if an error does not occur for read commands including the retry read command, judges the data to be valid. Uncertain data (suspect data) upon occurrence of a recovered read error is restored through disk retry, and accurate read data can be transferred to the host.

Abstract: A data transfer method transfers data stored in a first storage part to a second storage part within a storage apparatus. All data stored in units of data regions within the first storage part are transferred to the second storage part, and with respect to each data region for which a data transfer is unsuccessful, redundant data are transferred to the second storage part from a third storage part which stores the redundant data identical to the data stored in the first storage part.