Hitachi, Ltd.

Ikuo Uratani

Kiichiro Urabe

Akira Yamamoto

Manabu Kitamura

Shigeo Honma

Dai Taninaka

Shoji Sugino

Hiroshi Taninaka

An object is to efficiently set configurations of a storage apparatus. Provided is an information apparatus communicably coupled to a storage apparatus, which validates a script executed by the storage apparatusfor setting a configuration of the storage apparatus, the information apparatus generating configurations of the storage apparatuswhen after each command described in a script is executed sequentially; and performing consistency validation on the script by determining whether or not the command described in the script is normally executable in a case the command is executed on an assumption that the storage apparatushas the configuration immediately before the execution.

Information apparatus and method for controlling the same

When detecting the completion of remote copying of a primary volume to a secondary volume, a host compute splits a copy pair into the primary volume and the secondary volume and has the secondary volume store a snapshot of the primary volume. A backup server recognizes the secondary volume.

System and method for backup by splitting a copy pair and storing a snapshot

When detecting the completion of remote copying of a primary volume to a secondary volume, a host computer splits a copy pair into the primary volume and the secondary volume and has the secondary volume store a snapshot of the primary volume. A backup server recognizes the secondary volume.

Provided is a storage system having a host system, a first storage controller and a second storage controller. The first storage controller has a primary logical volume formed from an actual volume, and a secondary logical volume formed from a virtual volume capable of forming a copy pair with the primary logical volume. The second storage controller has an external volume formed from an actual volume to be mapped to the secondary logical volume. The host system has device data showing the mapping relationship between the external volume and the secondary logical volume.

Storage system and control method thereof, and computer program product

In order to allow a host computer to specify an operable logical unit (LU), a storage system responds with extended LU information, including at least connection portion numbers, target IDs and logical unit numbers according to an inquiry made from the host computer. An external storage system adds extended LU numbers used in coupling as responses to inquiry commands to specified logical units. Owing to such addition, the host computer is capable of collecting responses of inquiry commands to special device files of all storage systems recognized by the host computer. It is thus possible to obtain a list of extended LU numbers corresponding to all logical units recognized by the host computer. Since such an external storage system using LUN security is capable of effecting coupling operations only on logical units recognized by the host computer, security is enhanced.

Storage system

The present invention makes it possible to change over a volume transparently with respect to a host. A first storage deviceA and a second storage deviceB are connected through a communication networkB; a volumeprovided by the second storage deviceB is mapped as a volume of the first storage deviceA. A hostis capable of accessing either of the volumeor volumevia a virtual LU. A connection control unit, which may be constructed of tables or the like, connects the virtual LUto either one of volumeand volume. Changeover of the connection target is performed transparently with respect to the hostand so is not recognized by the host. Consequently, the actual data storage target volume can be changed over while the hostalways accesses the same virtual LU

Storage device and device changeover control method for storage devices

When copy instruction details are transferred to a first storage control unit from an application program, a channel processor captures the instruction details into local memory. Then, the instruction details are analyzed, and based on the analysis result, an open remote copy/MRCF instruction is output to an open remote copy/MRCF control section. If the instruction details have no problem, a response is made to a host unit that the writing response is normally made. To be ready for reading of inquiry information by the host unit, shared memory is searched for the inquiry information to create output data from the first storage control unit to the host unit. With such a structure, a storage device in a disk array apparatus external to another disk array apparatus can be used as resources of any device connectable to higher-level systems.

Disk array apparatus, and method for avoiding data corruption by simultaneous access by local and remote host device

A synchronization confirmation method required for operation of a database is provided to a host device connected to a disk device which provides remote asynchronous data transfer. Immediately after commit of write data, an application of the host device issues a sync command which requires synchronization confirmation. A disk control device notifies the host device of a number concerning latest data received from the host device of a local side and a number concerning latest data received by a remote side. When the two numbers have coincided with each other, the host device judges the commit operation to have been completed.

Storage system making possible data synchronization confirmation at time of asynchronous remote copy

A first host computer writes data as an object of transfer and its location information to a storage subsystem. A second host computer reads out the data as an object of transfer which has been written to said storage subsystem on the basis of the location information thus written thereto. As a result, the data transfer between the host computers can be carried out employing the storage subsystem.

First host computer through a first interface sending to a second host computer a message including information about transfer data written to a storage subsystem through a second interface

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Kaisei, Japan

Ikuo Uratani