Abstract: A storage apparatus and data protection method that can substantially improve the use efficiency of volumes. A virtual first volume is provided to a host apparatus, and a storage area with a necessary capacity from among one or more storage areas is dynamically allocated to the first volume in response to a write access request from the host apparatus; and write data from the host apparatus is stored in the storage area, and an access attribute representing the possibility or impossibility of access is set for the storage area.

Abstract: A storage apparatus and data protection method that can substantially improve the use efficiency of volumes. A virtual first volume is provided to a host apparatus, and a storage area with a necessary capacity from among one or more storage areas is dynamically allocated to the first volume in response to a write access request from the host apparatus; and write data from the host apparatus is stored in the storage area, and an access attribute representing the possibility or impossibility of access is set for the storage area.

Abstract: A method for programming an application function through connection of a plurality of event-driven-type function blocks each composed of a data processing block and an event processing block. The method comprises a first processing step and a second processing step. When a first data signal line is set in order to establish a connection between first and second event-driven-type function blocks, the first processing step is performed in order to set a first variable area corresponding to the established connection and adapted for data transfer. In the second processing step, a pointer for pointing to the first variable area is allocated to each of the first and second event-driven-type function blocks so that the first and second event-driven-type function blocks output data to and input data from the first variable area.

Abstract: A remote control system is provided to control remotely electronic equipment connected via a firewall to an external network. The remote control system have command information memory for storing command information transmitted from a user terminal via the external network. Further, command information transmission means is provided to receive a command fetch request transmitted from the electronic equipment via the external network and to read out command information corresponding to that request from the command information memory, and to transmit the command information via the external network to the electronic equipment as a response to that command fetch request.