Hitachi, Ltd.

Takeshi Horiuchi

Ryusuke Ito

Takashi Watanabe

Masaharu Murakami

Kenichi Miki

Sumio Kikuchi

Shiori Inoue

Hitoshi Ooyama

Akifumi Yanagawa

A storage control apparatus includes a first logical volume in which data has been stored in a pool that includes at least one of one or a plurality of logical volumes based on a plurality of physical storage devices as a pool volume, and divides the first logical volume into at least two real areas. The storage control apparatus allocates the first logical volume to a second logical volume that is a virtual logical volume that has been divided into at least two virtual areas. The storage control apparatus executes a first data movement processing for moving all data of the first logical volume to at least one pool volume other than the first logical volume, and allocates a real area of a movement destination of the data to a virtual area of an allocated destination of a real area of a movement source of the data as substitute for the real area in the first data movement processing.

Storage apparatus to which thin provisioning is applied and including logical volumes divided into real or virtual areas

Provided is a storage system, which includes: a storage medium for storing data; a plurality of ports for connection to a network; and a control section, and in which: the network is connected to another storage system; the plurality of ports include a first port; the plurality of ports involve a plurality of data transfer paths extending from the plurality of ports to the another storage system, which include a first data transfer path extending from the first port to the another storage system; and the control section: transmits data to be stored into the another storage system from the plurality of ports; acquires performances of the plurality of data transfer paths; and transmits, if the performance of the first data transfer path is lower than a predetermined threshold value, the data to be stored into the another storage system from the plurality of ports excluding the first port.

Storage system for optimally controlling a plurality of data transfer paths and method therefor

Provided are a storage system and data management method capable of improving the usage efficiency of a storage extent. With this storage system, a first storage apparatus dynamically allocates a storage extent to the first volume and sends data written by the host system in the first volume to the second storage apparatus; a second storage apparatus writes the data sent from the first storage apparatus in a corresponding position in the second volume pair-configured with the first volume and stores as management information the position to which the data from the first storage apparatus in the second volume was written; and the second storage apparatus, during the restoration processing of the first volume, refers to the management information and sends to the first storage apparatus the data in a position to which the data from the first storage apparatus in the second volume was written.

Storage system and data management method

A method and apparatus for analyzing a DO-statement to determine the type of a DO-variable and for determining whether a sign of an incrementation parameter at the time of compile can be determined are provided in a DO-loop object code generator in a compiler to select an object code generating method corresponding to the state of the DO-loop. As a result, object codes fitted to each DO-loop are generated which are so efficient as to improve the iteration count according to the ANSI standard, saving of use of registers, elimination of unnecessary calculation and the like.

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Yokohama, Japan

Takeshi Horiuchi