Hitachi, Ltd.

Hiroshi Kuwabara

Yoshio Mitsuoka

Katsuhiro Uchiumi

Keishi Tamura

Jushi Ide

Shuichi Yagi

Yasuji Kamata

Kenkichi Yamashita

Atsushi Yuhara

Junichi Hiwatashi

Katsunari Tsuri

Manabu Minoya

One embodiment provides a computer system and data backup method which enable improvements in the response performance of a storage apparatus to a write request from a host apparatus. In a case where, during execution of same intra-enclosure copy processing, a primary storage apparatus receives a write request in which the data write destination is a storage area in a target range for the same intra-enclosure copy processing in a first primary volume in the primary storage apparatus, the primary storage apparatus transmits an advance notification storing an address of a storage area in a secondary storage apparatus which corresponds to the data write destination storage area designated in the write request to the secondary storage apparatus such that an on-demand copy is executed based on the advance notification in the secondary storage apparatus.

Computer system and data backup method combining flashcopy and remote copy

A control apparatus of a storage unit having a first and a second communication ports for conducting communication with a computer, a first and a second processors that control respectively the first and the second communication ports, first and second storage devices that store respectively a first and a second queues for storing commands sent from the computer respectively to the first and the second communication ports, and a first nonvolatile memory that the first processor accesses, the first and the second processors executing the commands stored respectively in the first and the second queues to thereby control the communications with the computer, comprising a unit causing the second processor to implement execution of the command stored in the first queue; and a unit changing data stored in the first memory while the second processor is being caused to implement execution of the command stored in the first queue.

Control apparatus of storage unit, and method of controlling the control apparatus of storage unit

A plurality of key information items with a fixed constitution are stored in a shared memory of a first storage control system. Each key information item corresponds with each of the types of a second storage control system and includes, in a predetermined location in the key information, an information element that indicates the location of a particular information item among the plurality of information items in the control system information. A microprocessor in a Fiber Channel Adapter of the first storage control system determines whether to form a logical path with the second storage control system on the basis of the key information and the control system information that is received from the second storage control system.

Storage control system

In a storage control apparatus employed in a storage system arranged by containing a plurality of storage control apparatus connected via an IP (Internet Protocol) network to each other, the storage control apparatus stores thereinto necessary storage expiration equal to such an expiration during which data is required to be stored under safe condition, this data being stored in a first storage area of the storage control apparatus; stores thereinto first guarantee expiration equal to such an expiration during which the first storage area can store the data under normal condition; and stores thereinto second guarantee expiration equal to such an expiration during which a second storage area can store the data under normal condition, this second storage area being equal to a storage area of another storage control apparatus. When the necessary storage expiration of the first storage area is expired after the first guarantee expiration of this first storage area, the storage control apparatus transfers the data stored in the first storage area to the second storage area having the second guarantee expiration expired after the first guarantee expiration.

Storage control apparatus, storage system, and control method for storage system

A storage control system that makes it possible to integrate the setting of access between initiators and targets connected to a communication network and the setting of LUN security for the targets. The storage control system has: a host computer having one or more initiators; a storage controller having one or more targets and storage areas, and also having a security property-for defining access relationships between-the targets and the storage areas; and a server having a memory for storing correspondence relationships between the initiators and the targets, and a function for notifying the host computer and a storage controller of the correspondence relationships information. The host computer, the storage controller and the server are connected to each other via a communication network, and the storage controller sets, based on notification information from the server, the security property in such a manner that an initiator can access a specified storage area via a target, the initiator and the target having been notified of the notification information.

Storage control system and storage controller

The present invention relates to a storage device for supporting an iSCSI protocol as an interface with host devices, wherein, in realizing an authentication function of access control following the iSCSI protocol, presence and absence of an authentication of the host device connected under the same port can coexist. In the storage device that can be connected to a plurality of host devices, access information from the host devices is received through the iSCSI port, and the host devices are identified based on the access information and refers to an authentication control table memorized in a shared memory and associating an iSCSI name for specifying the host device in the unit of iSCSI port, with authentication information of the host device (necessity of authentication, user ID/password), to determine the necessity of the authentication to the iSCSI port from the host device. If the authentication is necessary from a result of the determination, the authentication is carried out and accessibility to a memory device is controlled based on the result of the authentication.

Storage device

A plurality of key information items with a fixed constitution are stored in a shared memory of a first storage control system. Each key information item corresponds with each of the types of a second storage control system and includes, in a predetermined location in the key information, an information element that indicates the location of a particular information item among the plurality of information items in the control system information. A microprocessor in a Fibre Channel Adapter of the first storage control system determines whether to form a logical path with the second storage control system on the basis of the key information and the control system information that is received from the second storage control system.

In an access control system, accesses are controlled which are received from not only the same communication network, but also either one or a plurality of other communication networks. In this access control system, a channel processor of a storage control system accepts a log-in request containing a target IP address from a target host apparatus, and compares this target IP address with the own IP address stored in an iSCSI port. Based upon a comparison result, the channel processor judges a network relative logical distance of a target network with respect to a communication network containing the storage control system as to the target network containing a target host apparatus. Then, the channel processor permits an access of a permission access type corresponding to the judged network relative logical distance with respect to a target upper grade apparatus.

Access control apparatus and access control method

In a work flow system in which work defined beforehand with respect to data processing is executed by a plurality of workers in a plurality of nodes connected to each other through an information network, data processed in a branch source node is divided into split data so that the split data are distributed to some branch destination nodes. The split data processed in the respective branch destination nodes are connected as input data to be given to a connecting destination node. A work flow control engine sets data start and end positions of each of the split data, split data information, and connection data information into a dividing/connecting information table. The work flow control engine renews the data start and end positions in the dividing/connecting information table in accordance with increase/decrease of the split data processed in each of the branch destination nodes.

Method of controlling a work flow system

A CRT picture display apparatus of the raster scan type comprises a cathode ray tube for raster scanning, a horizontal deflection circuit for supplying a horizontal deflection current to a horizontal deflection coil of the CRT, a vertical deflection circuit for supplying a vertical deflection current to a vertical deflection coil of the CRT, and a display data generator for supplying data to be displayed to the CRT. The horizontal deflection circuit produces as the horizontal deflection current a triangular current having one period which is twice a horizontal scanning period, and the triangular current has a first portion which increases in response to a horizontal sync signal at a predetermined inclination and a second portion which decreases in response to the next horizontal sync signal at the predetermined inclination and continues until the further next horizontal sync signal, whereby the period for a scanning line to proceed from lefthand end to righthand end of a raster on a screen of the CRT is made substantially equal to the period for the next scanning line to proceed from righthand end to lefthand end, and data is displayed during both the periods.

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Ninomiya, Japan

Hiroshi Kuwabara