DISK UNIT AND LOGGING METHOD FOR DISK UNIT

PROBLEM TO BE SOLVED: To provide a disk unit and the logging method of the disk unit for arbitrarily extracting logging data when any failure is occurred without using a CPU regardless of the status of the CPU. SOLUTION: In this disk unit which is provided with an integrated circuit device for disk control having a CPU for performing various control to a disk, the integrated circuit device for disk control is provided with a logging circuit 20 in hardware configurations which is able to output the internal information or status of a CPU 2 without using the CPU 2 through an independent path regardless of the performance of a program by the CPU 2. The logging circuit 20 is provided with a function which acquires only logging data matched with preliminarily set conditions from logging data when the failure of the CPU 2 is generated, and outputs the logging data to the outside. COPYRIGHT: (C)2005,JPO&NCIPI