CONTROL SYSTEM FOR DESIGNATING CAPACITY OF DATA TRANSFER

PURPOSE:To easily designate the capacity of data transfer by adopting a constitution for specifying data transfer in each byte or block in accordance with a request. CONSTITUTION:An I/O control part 3 is constituted of a byte count designation part 1, a block number designation part 2, etc. The I/O control part 3 commands whether or not data transfer is executed in each byte or block on the basis of designation information stored in the designation part 1 and informs the number of bytes stored in the byte count designation part 1 or the number of blocks stored in a block count designation part 2 to disk devices 4-1, 4-2.