Abstract: When performing asynchronous remote copying, whether or not a disaster has occurred at a main site is judged at a remote site; and if the disaster has occurred, recovery processing is immediately started at the remote site. When asynchronous remote copying is performed between a controller and a controller, the controller transfers remote copy target data in a storage apparatus and command information via a remote copy channel to the controller; and after receiving the remote copy target data, the controller stores the remote copy target data in a storage apparatus; and if the controller fails to receive the command information within a set time period, the controller judges that a disaster has occurred, and then outputs the judgment result to a backup center server; and the backup center server executes recovery processing based on data in the storage apparatus when the disaster has occurred.

Abstract: When performing asynchronous remote copying, whether or not a disaster has occurred at a main site is judged at a remote site; and if the disaster has occurred, recovery processing is immediately started at the remote site. When asynchronous remote copying is performed between a controller and a controller, the controller transfers remote copy target data in a storage apparatus and command information via a remote copy channel to the controller; and after receiving the remote copy target data, the controller stores the remote copy target data in a storage apparatus; and if the controller fails to receive the command information within a set time period, the controller judges that a disaster has occurred, and then outputs the judgment result to a backup center server; and the backup center server executes recovery processing based on data in the storage apparatus when the disaster has occurred.

Abstract: In the host, an IP issues CCW, and a CH encodes the CCW and a CCW chain by the encode program to create a code including the description of controlling a conditional branch with the DKC and transmits the code to a PORT in the DKC. In the DKC, the PORT decodes the code by the decode program, and a CP sequentially processes each command obtained by the decoding and returns a return code representing the end state of the processing. The host receives the return code to recognize the end state of the processing.

Abstract: In the host, an IP issues CCW, and a CH encodes the CCW and a CCW chain by the encode program to create a code including the description of controlling a conditional branch with the DKC and transmits the code to a PORT in the DKC. In the DKC, the PORT decodes the code by the decode program, and a CP sequentially processes each command obtained by the decoding and returns a return code representing the end state of the processing. The host receives the return code to recognize the end state of the processing.

Abstract: A plurality of services are defined for one service memory field (overlap service), and a plurality of access methods, such as “only read” and “read/write”, are set in the service memory field. When an overlap service is defined, a PIN code may be set to each service. For example, when two services “read” and “read/write” can be started corresponding to a service memory field, two PIN codes are set.

Abstract: In the host, an IP issues CCW, and a CH encodes the CCW and a CCW chain by the encode program to create a code including the description of controlling a conditional branch with the DKC and transmits the code to a PORT in the DKC. In the DKC, the PORT decodes the code by the decode program, and a CP sequentially processes each command obtained by the decoding and returns a return code representing the end state of the processing. The host receives the return code to recognize the end state of the processing.

Abstract: A plurality of services are defined for one service memory field (overlap service), and a plurality of access methods, such as “only read” and “read/write”, are set in the service memory field. When an overlap service is defined, a PIN code may be set to each service. For example, when two services “read” and “read/write” can be started corresponding to a service memory field, two PIN codes are set.

Abstract: Disclosed is an apparatus for producing an original plate for optical discs, which is allowed to produce original plates for a plurality of kinds of optical discs satisfying various standards. The apparatus includes a laser light generator for generating laser light; a diaphragm mechanism for limiting laser light generated by the laser light generator; and an objective lens for refracting the laser light limited by the diaphragm mechanism in such a manner that the laser light is focussed on a photosensitive layer or a surface layer formed on the original plate; wherein a spot diameter of a beam of the laser light is changed by varying a diaphragm diameter of the diaphragm mechanism.