Abstract: For a computer system that includes a storage system and a management computer, the storage system includes a first storage area, for storing data used by a computer connected to the storage system, and a second storage area, for storing a duplicate of the data included in the first storage area. The management computer includes first management information, for managing the frequency at which the data in the first storage area are copied. When the management computer receives a notification indicating the first storage area has been unmounted from another computer, the management computer employs the first management information for determining whether the data in the first storage area should be copied. Then, when the data should be copied, the first storage area is mounted on the computer and the data in the first storage area are copied to the second storage area.

Abstract: A computer system can always execute processing under the same environments not depending on the terminal device that is directly used by the user, no matter where the client used by the user is, and no matter what device is used. In the computer system, one of plural computer PCBAs that do not install a hard disk device therein is selected from the terminal device, remotely controllable environments are constituted, and data is read and written from the hard disk device which are coupled to all of the computer PCBAs over a network that is used by the user.

Abstract: A computer system, method and apparatus includes: centrally managing user identification names and passwords that are assigned to users, target names of storage devices, addresses, and logical units; acquiring target names of storage devices and logical unit names from the user identification names and passwords obtaining the addresses of the storage devices from the user identification names, passwords, and target names; and dynamically creating access control information of the logical units for each session in an iSCSI session establishment processing. The system, method and apparatus enable sharing of storage devices so as to enable users to use logical units assigned to the users in any computers in a system using storage devices complying with the iSCSI protocol, connected to networks, such as IP networks, through node devices, such as cache devices and gateway devices.

Abstract: The system management server 10 makes a request to the virus detection and removal server 30 for virus detection processing on a specified primary volume of the storage system 20. The virus detection and removal server 30 executes virus detection processing on the requested primary volume and the secondary volume that forms the volume pair at the storage system 20. Even during virus detection processing on the storage system 20, it is possible for the centric PCs 40 and 42 to continue write and read processing on the requested primary volume.

Abstract: The storage system creates a volume for storing information specific to a user, and a volume for storing software shared by a plurality of users, links these volumes on the basis of the software usage status of the users, and virtually builds one region and supplies same to the users.

Abstract: A computer 10a stores boot information OA1 and application information AP1 stored on a local disk 16a, the information being respectively stored as an OS1 shared file group in a shared LU1 and as a AP1 shared file group in a shared LUn+1. For personal information (including personal information of boot information or AP information), computer 10a stores the information as a user personal file group in an personal LU1. Computer 10a transmits image outline information, LU information and file information for the sets of information stored in shared LU1, shared LUn+1 and personal LU1 to an disk-image management server 30, where the information is stored in the storage device 31 of the disk-image management server 30.

Abstract: The management and reliability of communications between computers and a storage system are improved. As between the primary and secondary communication ports of storage devices 20a, 20b, the system management server 10 sets the primary communication port as the current communication port as a default setting in each storage device. Where the system management server 10 monitors the primary and secondary communication ports and the current communication port fails or can otherwise no longer be used, the other communication port is set as the current communication port. The system management server 10 also manages the states of each communication port and the setting of the current communication port as communication port information.

Abstract: To provide a technique whereby a user can carry out operations in the same operating environment, regardless of whether the user uses a computer inside a network system, or uses a terminal outside the network system. A network system comprises: a first computer used by a designated user; and a plurality of second computers capable of being shared by a plurality of users. A management device, if a storage device is utilized by the first computer, allows the first computer to connect to a designated storage area and execute the boot-up program stored therein. The management device, if the storage device is utilized by an external terminal used by the designated user, allows one designated computer selected from the plurality of second computers to connect to the designated storage area and execute the boot-up program, and allows the external terminal to connect to the designated computer.

Abstract: A computer 10a stores boot information OA1 and application information AP1 stored on a local disk 16a, the information being respectively stored as an OS1 shared file group in a shared LU1 and as a AP1 shared file group in a shared LUn+1. For personal information (including personal information of boot information or AP information), computer 10a stores the information as a user personal file group in an personal LU1. Computer 10a transmits image outline information, LU information and file information for the sets of information stored in shared LU1, shared LUn+1 and personal LU1 to an disk-image management server 30, where the information is stored in the storage device 31 of the disk-image management server 30.

Abstract: The storage system creates a volume for storing information specific to a user, and a volume for storing software shared by a plurality of users, links these volumes on the basis of the software usage status of the users, and virtually builds one region and supplies same to the users.

Abstract: A diskless computer is allowed to finish a write request with no influence of a storage device and a network of the storage device. A node device 104 passes on information sent and received between a diskless computer 101 and a storage device 102. When information sent from the diskless computer 101 is a write request to the storage device 102, target data of the write request is cached, and a response to the write request is sent to a source diskless computer of the write request. The write request for the data having been cached is sent to a storage device into which the data is written, and a response to the write request is received from the storage device.

Abstract: A storage device has a capability of learning access patterns by which a plurality of computers access to the device. The storage device stores a specific access history for each computer and causes a management computer to report a type of file access. This allows the storage device to save information in a cache memory before start of a file access to be executed by the computer.

Abstract: A computer system includes: means for centrally managing user identification names and passwords that are assigned to users, target names of storage devices, addresses, and logical units; means for acquiring target names of storage devices and logical unit names from the user identification names and passwords; means for obtaining the addresses of the storage devices from the user identification names, passwords, and target names; and means for dynamically creating access control information of the logical units for each session in iSCSI session establishment processing.

Abstract: A copy computer includes a storage device which stores a copy of contents from a distribution computer and a module which creates a copy of updated contents based on a copy request and which sends a copy of contents requested by a search computer to a distribution request computer. The search computer includes a module which searches for a copy computer storing the copy of the contents requested by the distribution request computer, a module which forwards a send request to a specified copy computer, and a module which sends the copy request and the copy contents to a predetermined copy computer when the contents are updated. The copy request gives an instruction to create the copy of the updated contents in the storage device of the copy computer.

Abstract: A stream server comprises a first interface for transmitting and receiving a packet to and from a client apparatus belonging to a particular network without involvement of a firewall apparatus and for transmitting and receiving a packet to and from the client apparatus belonging to a network different from the particular network via the firewall apparatus a second interface for transmitting and receiving a packet to and from the client apparatus belonging to the network different from the particular network without involvement of the firewall apparatus, the second interface being connected to a second network and a process module for executing a communication process, via an interface identified in accordance with a network attribute and a type of a communication protocol of the client apparatus and based on the communication protocol, relative to the client apparatus.

Abstract: The top-side (n-type) electrode and bottom-side (p-type) electrode of a Si chip with a p-n junction are pressed against a Cu cathode electrode and a Cu anode electrode via Mo plates respectively, thereby establishing electrical connection. The inner wall of a case is round and the Si chip is almost square. The top of the case is covered with ceramic, for example. A washer is a compression member. A chip frame holds the Si chip and Mo plates in compression positions and simultaneously determines their locations within the case. Specifically, the side face of the Si chip is not flush with the side face of each of the Mo plates. This enables the chip frame to make the creepage distance longer. Since the chip frame is a single chip frame without any joint, the creepage distance between the anode and cathode electrodes is defined by part of the chip frame that faces part of the surface of the Si chip and parts of the surfaces of the Mo plates sandwiching the Si chip between them.