| 摘要 |
A magnetic disk apparatus is disclosed, in which the product specifications such as the number of heads, the number of disks and the information on the destination of the apparatus can be efficiently, accurately identified by a single circuit. The magnetic disk apparatus comprises an identification circuit that can identify the performance specification information. The identification circuit includes a first resistor circuit arranged on a cable connecting a head actuator and a printed board, a second resistor circuit formed on the printed board and having an end thereof connected to a reference voltage and the other end thereof connected in series to the first resistor circuit, an A/D converter for converting the voltage value at the junction point of the first and second resistor circuits into a digital value of a predetermined number of bits, and a memory for storing in advance the performance specification information and the control information of the magnetic disk apparatus corresponding to a digital value of a predetermined number of bits. The control circuit on the printed board can thus control the magnetic disk apparatus by judging the performance specification information of the magnetic disk apparatus from the output value of the A/D converter and the value stored in the memory.
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