Abstract: A device management system is provided which is used in a client/server architecture system, enabling safe sharing of a device without compromising user convenience. In a case where the device which is connected to a client is accessed from a server, in order that the device connected to the client can be used from the server by merely connecting the device to the client without performing another operation, a filter is provided on the client side, and a pseudo bus driver is provided on the server side. The filter in the client exclusively controls client operations to the device and server operations to the device. The pseudo bus driver virtually functions as a device driver between a communication unit for the client and the application in the server.

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 memory device is provided which is connected to operate with power and clocks supplied from a host apparatus. The memory device includes external terminals, a flash memory chip to store data, an IC chip to process data; and a controller chip connected with the external terminals, the flash memory chip and the IC chip, wherein, the flash memory chip, the IC chip and the controller chip are discrete chips. The controller chip writes data inputted from the host apparatus into the flash memory chip or the IC chip and transfers data read from the flash memory chip or the IC chip to the host apparatus, based upon commands from the host apparatus.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.

Abstract: A invented computer system has a plurality of computer boards; a plurality of terminals, each of which is coupled to each of the computer boards respectively via a network; a storage device having a plurality of storage areas, which is coupled to each of the computer boards; and a management computer; and wherein the management computer manages a correspondence between a user information and the storage area, and when a use request of the computer board is transmitted from a terminal, the management computer selects a usable computer board to turn on a power, reads information necessary to start the computer board from the storage corresponding to the transmitted user information, allows the computer board to start based on the read information, and notifies the terminal of information on the started computer board and identification information on the network allocated to the started computer board.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.

Abstract: It is an object of the invention to improve security of a storage apparatus. The invention has: a flash memory chip; an IC card chip which can execute a security process (encryption, decryption, etc.); and a controller chip for controlling read/write of data from/into the flash memory chip and the IC card chip in response to a request from a host.

Abstract: In a client/server architecture system, a device management system having the function of safely sharing a device without compromising user convenience is provided. The device is coupled to a terminal that the user uses or a hub coupled to a network. A device management manager having a device driver function and communication function installed on the terminal or the like, a virtual device manager having a device driver function and communication function installed on the server, and an authentication server that manages access permission for the device allow the device to be virtually available as in the case of the device directly coupled to the server while managing the access to the device.

Abstract: A storage device includes a tamper-resistant module and a flash memory. In correspondence with a command, a CPU inside the tamper-resistant module judges the security of data received from the outside, then recording the data as follows: High-security and small-capacity data is recorded into a memory inside the tamper-resistant module. High-security and large-capacity data is encrypted, then being recorded into the flash memory. Low-security data is recorded as it is into the flash memory. This recording method permits large-capacity data to be stored while ensuring a security (i.e., a security level) corresponding thereto.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.

Abstract: To provide an access control service and control server for protecting a computer from an Illegal access such as a password cracking, in a terminal service and other related services. An access server 3 includes an authentication manager 7 for authenticating a user to operate a terminal, and an ACE manager 9 for setting a network link that enables communication between a terminal 1 that the user operates and a specific computer unit 2, to a hub 4 in accordance with a result of the authentication. Information on each user and information on the specific computer unit 2 that the each user can use are associated with each other and registered in the ACE manager 9.

Abstract: Disclosed is a secure remote access system for improving convenience of a user by utilizing a storage device including an anti-tampering device as a user authentication device in the secure remote access system for making access and execution of job while a user is making the encrypted communication to a server from an unspecified client. Usability can be improved and thereby the job executing function can be used smoothly at the internal and external sides of the working office by providing a server client system where the server can be manipulated remotely by distributing a storage device loading the authorized anti-tampering device to users, connecting the storage device to unspecified clients by users, and using the authentication information and application stored in the storage device. A remote access system having improved security and convenient during usage of client from the user can also be provided by reducing the secret information remaining in the manipulated client.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.

Abstract: A semiconductor disk wherein a flash memory into which data is rewritten in block unit is employed as a storage medium, the semiconductor disk including a data memory in which file data are stored, a substitutive memory which substitutes for blocks of errors in the data memory, an error memory in which error information of the data memory are stored, and a memory controller which reads data out of, writes data into and erases data from the data memory, the substitutive memory and the error memory. Since the write errors of the flash memory can be remedied, the service life of the semiconductor disk can be increased.