Abstract: The storage system of the present invention is able to update a secret while maintaining a session between a host and storage. The administrator configures a new secret for the host and the storage. The session manager issues a request to the storage to open a session that uses the new secret. The session manager opens a session that uses the new secret following authentication. A response to an old command issued prior to the secret update is transmitted from the storage to the host via a session that uses an old secret. A new command following the secret update is transmitted from the host to the storage via the session that uses the new secret. When all the old command processing is complete, the old secret using session is closed.

Abstract: Data migration arrangements for storage systems are disclosed.

Abstract: A memory device system of the present invention is equipped with a memory device comprising a first memory unit for storing data, and a second memory unit for storing an access log regarding an access to the first memory unit; a port for inputting and outputting data; a control device for writing the access log in a memory area other than the area, where the access log is already written in the second memory unit, if an access request to the first memory unit is input through the port and the access log is written in the second memory unit according to the access request, and for prohibiting a write in the second memory unit if an information write request in the second memory unit is input through the port.

Abstract: The usage of communication systems is improved. An IM server 4 manages presence information regarding each of IM clients and usable media and user information such that each of the IM clients can obtain these kinds of information. In order to perform text chatting, the IM server 4 manages a connection between each of the IM clients participating the chat and the IM server 4, merges text from each of the participating IM clients and distributes the result to each of the participating IM clients. In order to perform voice chatting, an AP server 5 manages a connection between each of the IM clients participating the chat and an MD server 6, mixes voice from each of the participating IM clients except for a focused IM client and distributes the result to the focused participating IM clients. This processing is performed for each of the participating IM clients.

Abstract: A storage system comprises a plurality of storage nodes and a controller coupling unit interconnecting controllers within the storage nodes. A memory in the controller has a plurality of shared memory areas each associated with a combination of one CPU core with one logical unit controller. When a network controller of a first storage node receives a host command addressed to a logical unit of a second storage node, the CPU core of the first storage node stores the host command in the shared memory area associated with the logical unit controller of the second storage node. The logical unit controller of the second storage node acquires the stored host command in the shared memory area via the controller coupling unit.

Abstract: Upon detection of a virus definition file update, a virus check server mounts a computer's storage area in a storage apparatus via a network to check whether or not a file stored in the storage area is infected with a virus. For the virus check, the virus check server communicates with the storage apparatus via a path different from the one that is laid between a user computer and the storage system. Therefore, a virus check executed by the virus check server does not lower the computer's communication speed and disk access speed.

Abstract: A virtualization switch virtualizes a data storage area provided by a server device and provides it to a server device. This virtualization switch processes a priority control and a bandwidth control also on the output side to packets which make an access to a virtual volume and which have different demands for a QoS but identical IP headers according to a discrimination result of a TCP connection. Here, the TCP connection is discrimination by managing a TCP source port on the side of the virtualization switch.

Abstract: A computer system including a file device that handles a file and a storage apparatus that stores the file, the computer system includes: first and second real volumes that have physical storage areas, the storage apparatus contains the first and second real volumes; a virtual volume provider that provides a virtual volume having virtual storage areas to the file device; a real volume selector that, when a write command for writing the file to the virtual volume is transmitted from the file device to the storage apparatus, selects one of the first and second real volumes based on an access path over which the write command is transmitted; a relation manager that relates a virtual storage area on the virtual volume specified in the write command to a physical storage area on the selected real volume; and a write executor that writes the file specified in the write command to the related physical storage area.

Abstract: A storage unit is provided which is connected to a host computer through a network, having one or more disks in which read and write operations are performed during rotation and a control unit for controlling the rotation of the disks. In the storage unit, when receiving a message which is sent from the host computer and predicts that at least one of the disks will come in use, the control unit causes the at least one of the disks which will come in use, to rotate.

Abstract: In a computer system having a storage device, switches and hosts respectively connected by a network, in accordance with an ID of a logical volume of the storage device and an IP address of a host, access control configuration of the logical volume is performed relative to the storage device, the IP address of the host is converted into a MAC address, the MAC address of the host is converted into a port ID of the switch connected to the host, and addition of the port to virtual local area network (VLAN) is performed for the switch. Logical unit number (LUN) masking and VLAN configuration essential for security countermeasure of IP-SAN (Internet protocol-storage area network) can be managed collectively by a system administrator so that the running cost of IP-SAN can be lowered.

Abstract: In a computer system having a storage device switches and hosts respectively connected by a network, in accordance with an ID of a logical volume of the storage device and an IP address of a host, access control configuration of the logical volume is performed relative to the storage device, the IP address of the host is converted into a MAC address, the MAC address of the host is converted into a port ID of the switch connected to the host, and addition of the port to virtual local area network (VLAN) is performed for the switch. Logical unit number (LUN) masking and VLAN configuration essential for security countermeasure of IP-SAN (Internet protocol-storage area network) can be managed collectively by a system administrator so that the running cost of IP-SAN can be lowered.

Abstract: In a computer system having a storage device, switches and hosts respectively connected by a network, in accordance with an ID of a logical volume of the storage device and an IP address of a host, access control configuration of the logical volume is performed relative to the storage device, the IP address of the host is converted into a MAC address, the MAC address of the host is converted into a port ID of the switch connected to the host, and addition of the port to virtual local area network (VLAN) is performed for the switch. Logical unit number (LUN) masking and VLAN configuration essential for security countermeasure of IP-SAN (Internet protocol-storage area network) can be managed collectively by a system administrator so that the running cost of IP-SAN can be lowered.

Abstract: A memory device system of the present invention is equipped with a memory device comprising a first memory unit for storing data, and a second memory unit for storing an access log regarding an access to the first memory unit; a port for inputting and outputting data; a control device for writing the access log in a memory area other than the area, where the access log is already written in the second memory unit, if an access request to the first memory unit is input through the port and the access log is written in the second memory unit according to the access request, and for prohibiting a write in the second memory unit if an information write request in the second memory unit is input through the port.

Abstract: A storage system is connected to a computer, and a name server exercising control over the interrelation between initiators and targets, and includes a first storage node and a second storage node. The first storage node has a first logical unit to which a first target is set, and the second storage node has a second logical unit. For data migration from the first logical unit to the second logical unit, the first storage node forwards data stored in the first logical unit to the second storage node, and the second storage node stores the data into the second logical unit. The first storage node also forwards information about the first target to the second storage node, and the second storage node sets a target to the second logical unit using the received information about the first target.

Abstract: Each of the storage devices 1, 2 is provided with transmission queues 306a, 306b with respect to each of transmission paths A and B. The storage device 1 stores identical request data in each of the transmission queues 306a and 306b, and transmits each data to the counterpart storage device 2, respectively via the transmission path A and B (S811, 812). The storage device 2, being a counterpart, stores the request data or response data arrived earlier in the receive history information table 300 (S817), and discards the request data arrived later (S903, 904). Furthermore, if the storage device 1, being a transmission source, receives at least one response data against the request data, the storage device 1 searches the transmission queues 306a, 306b, and if there remains request data in any of the transmission queue, deletes the request data (S909).

Abstract: To automatically disperse access loads even when the number of client PCs using a storage-centric network changes. A storage controller that controls data write and data read in a disk device in which one or more logical units are set, includes: plural ports connected to client computers via a network; and plural microprocessors that control data input/output through the ports, in which one of the microprocessors serves as a representative microprocessor, and the representative microprocessor refers to, when receiving an access request to access the logical unit from one of the client computers, a connection state of each of the microprocessors and assigns the requested access to one of the microprocessors.

Abstract: In a data archive system, a time necessary for to processing a search task is shortened. A data archive system according to this invention includes: a storage apparatus including plural volumes in which data is stored; plural search servers which process a search task which requests a search for desired data; and a management server that includes a CPU, an interface, and a memory and manages the search servers, in which the management server has a table adapted to manage the data stored in the volumes, obtains load information concerning the search servers, selects each of the search servers, which is to process the search task based on the load information, identifies each of the volumes, in which the data requested with the search task is stored, based on the table, and notifies the selected search server of the volume, and the search server processes the search task with respect to the volume.

Abstract: A system is provided in which a first storage device for managing a target to which a first physical port and a first logical volume are allocated, a second storage device for managing a second logical volume, and a computer for establishing a first communication path with the first physical port and conducting access to the target by using the communication path. The first storage device creates in the second storage devices a target holding an identifier identical to that of the aforementioned target and allocates the second logical volume and a second physical port to the target, and the computer establishes a second communication path with the second physical port and maintains the access to the target by using the second communication path.

Abstract: A storage device managing one or more logical volumes is connected with a name management device through an IP-SAN 6 composed of a switch. The storage device stores a topology table saving connecting relation among physical ports of host, physical ports of the storage device and physical ports of the switch, reads an identifier of the host and an identifier of the logical volume, selects a unused first physical port of the switch by referring to the topology table, selects a second physical port of the switch connected with the storage device, registers a group composed of the host and the logical volume with the name management device, and executes a configuration of allowing packets to be transferred between the first and the second physical ports with respect to the switch.

Abstract: A storage system includes a first storage node and a second storage node. The first storage node has a first logical unit to which a first target is set, and the second storage node has a second logical unit. To migrate data from the first logical unit to the second logical unit, the first storage node forwards data stored in the first logical unit to the second storage node, and the second storage node stores the data into the second logical unit. The first storage node also forwards information about the first target to the second storage node, and the second storage node sets a target to the second logical unit using the received information.