| http://www.w3.org/ns/prov#value | - The disk controller unit 120 is provided in the form of a circuit including a CPU, a protocol control chip, memories such as RAM and ROM and mounted on the control board 59; and functions to control and monitor the disk drives 51?? and 51?? mounted in the basic casing 20 and additional casings A and B (30). [0079] A main switch 85 is provided, e.g., on the front side of the basic casing 20, so tha
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