| 摘要 |
A disk apparatus includes a slot. A magnetooptical disk is attached to the slot. When the slot is closed, a system controller inputs a corresponding signal to a CPU. The CPU applies a read-out command of disk information to the disk controller. The disk controller drives a spindle motor, an optical pick-up and a recording head in order to read-out vacant capacity information from the magnetooptical disk. The read-out vacant capacity information is sent back to the CPU, and then saved in a flash memory by the CPU.
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