Patent ID: 7274525

Claim:
An information processing system comprising: a writable disc ( 11 ); a disc drive section for driving said disc; a first head ( 12 ) arranged so as to be able to perform reading only for reading data from said disc; a first head drive section ( 14 ) for driving said first head; a first head control circuit ( 16 ) for controlling said first head; a first input/output channel ( 18 ) connected to said first head control circuit; a second head ( 13 ) for reading data from and writing data into said disc; a second head drive section ( 15 ) for driving said second head; a second head control circuit ( 17 ) for controlling said second head; a second input/output channel ( 19 ) connected to said second head control circuit; a first computer ( 22 ) connected to said first input/output channel ( 18 ) and provided with an external storage device; and a second computer ( 23 ) connected to said second input/output channel ( 19 ); wherein said first head and said second head are driven independently of each other.