摘要:
A storage device system in which migration of data from an existing storage device to a higher-standard storage device is unnecessary, and in which discarding of existing storage devices by the user can be prevented. A CHF 61 receives a Read Capacity command from a new-type storage device 25 (S101). Using LDEV, LUN and other information tables, an LUN 87 is converted into a mapped LDEV (S102). A check is performed to determine whether the LDEV emulation type is read-only, write-only, or read/write (S103). If none of these, a check is performed to determine whether the emulation type is newly created (S104). If newly created, the size of all storage areas of the LDEV are set as the Max LBA in a response to the new-type storage device 25 (S105). If the result of S103 is YES, the size of the user area in the LDEV is set as the Max LBA in a response to the new-type storage device 25 (S106). If not newly created, processing proceeds to the processing of S106.
摘要:
A storage device system in which migration of data from an existing storage device to a higher-standard storage device is unnecessary, and in which discarding of existing storage devices by the user can be prevented. A CHF 61 receives a Read Capacity command from a new-type storage device 25 (S101). Using LDEV, LUN and other information tables, an LUN 87 is converted into a mapped LDEV (S102). A check is performed to determine whether the LDEV emulation type is read-only, write-only, or read/write (S103). If none of these, a check is performed to determine whether the emulation type is newly created (S104). If newly created, the size of all storage areas of the LDEV are set as the Max LBA in a response to the new-type storage device 25 (S105). If the result of S103 is YES, the size of the user area in the LDEV is set as the Max LBA in a response to the new-type storage device 25 (S106). If not newly created, processing proceeds to the processing of S106.
摘要:
A storage apparatus comprises a disk device and a disk adapter for controlling the disk device. The disk adapter controls the disk device and forms a data volume and a pool volume, creates a data block for parity data, compresses write data and the created parity data, and stores a number of compressed data blocks equal to or less than a predetermined number and stores compressed parity data that are within a predetermined size in storage areas in an actual volume, and stores the remaining compressed data blocks of a number greater than the predetermined number and compressed parity data that exceed the predetermined size in storage areas in the pool volume corresponding to a virtual volume.
摘要:
For using a plurality of files contained in one logical device with a plurality of processing systems, sharing of a data storage unit among the plurality of processing systems is realized without need for a host processing system to check use states of the files in a server storage unit. Information concerning extent (extent range) of an input/output processing request issued by a host processor is stored in a control memory incorporated in a control unit for allowing the control unit to make decision as to overlap of the extents of the input/output processings to thereby effectuate exclusive control on an extent-by-extent basis.
摘要:
A crash test apparatus for truck cabs includes a fixture frame mounting a cab, a cart mounting the fixture frame, a protruding barrier disposed in front of the cab, and a crash device moving the cart to make the cab crash against the protruding barrier. The crash test apparatus includes a buffer device disposed between a front of the cart and the protruding barrier, and when the crash device operates, deforming by a deformation amount of a frame of a vehicle on which the cab is mounted, to make the cab crash against the protruding barrier.
摘要:
A storage apparatus comprises a disk device and a disk controller for controlling the disk device. The disk controller provides a data volume including an actual volume and virtual volume with a volume capacity virtualization function. The virtual volume is associated with a pool volume for storing the actual data and the actual data is stored in the pool volume. In response to a write command from a host computer, the disk controller compresses write data under RAID 5 control and stores the compressed data in a storage area in the actual volume. If the entire compressed data cannot be stored in that storage area, the disk controller stores the remaining portion of the compressed data in the virtual volume.
摘要:
A storage apparatus comprises a disk device and a disk controller for controlling the disk device. The disk controller provides a data volume including an actual volume and virtual volume with a volume capacity virtualization function. The virtual volume is associated with a pool volume for storing the actual data and the actual data is stored in the pool volume. In response to a write command from a host computer, the disk controller compresses write data under RAID 5 control and stores the compressed data in a storage area in the actual volume. If the entire compressed data cannot be stored in that storage area, the disk controller stores the remaining portion of the compressed data in the virtual volume.
摘要:
For using a plurality of files contained in one logical device with a plurality of processing systems, sharing of a data storage unit among the plurality of processing systems is realized without need for a host processing system to check use states of the files in a server storage unit. Information concerning extent (extent range) of an input/output processing request issued by a host processor is stored in a control memory incorporated in a control unit for allowing the control unit to make decision as to overlap of the extents of the input/output processings to thereby effectuate exclusive control on an extent-by-extent basis.
摘要:
For using a plurality of files contained in one logical device with a plurality of processing systems, sharing of a data storage unit among the plurality of processing systems is realized without need for a host processing system to check use states of the files in a server storage unit. Information concerning extent (extent range) of an input/output processing request issued by a host processor is stored in a control memory incorporated in a control unit for allowing the control unit to make decision as to overlap of the extents of the input/output processings to thereby effectuate exclusive control on an extent-by-extent basis.
摘要:
A data processing system including a disc unit having a plurality of logical devices, a central processing unit for issuing commands with the plurality of logical devices designated as a processing range, and a disc controller for executing the commands for all of the logical devices designated as the processing range. The commands are issued by the central processing unit to the disc controller by executing an initial program load or channel path online.