When during the operation of recording a signal onto a disk the amount of signal
data stored in a buffer RAM for temporarily storing a recording signal falls below
an interruption set value, the recording operation on the disk is interrupted.
Subsequently, when the amount of signal data stored in the buffer RAM increases
to a resumption set value, a signal recorded on the disk before the interruption
is reproduced. On the basis of the reproduced signal, the recording operation is
resumed from a position where the recording is interrupted. The operation of resuming
recording that is interrupted due to a shock is permitted. The operation of resuming
recording after the interruption of the recording is started from a position that
is before the position where the recording is interrupted.
