Self-diagnostic device for disk controller

Abstract

Abstract PURPOSE:To quickly detect the hardware abnormality by writing and reading the diagnostic data into and out of a spare sector of a disk and diagnosing a disk controller when the input of a command to the disk controller is ended. CONSTITUTION:A self-diagnostic control part 5 starts its operation when a command is inputted to a disk controller from a CPU2 and the normal control action of the disk controller is ended. Then a spare sector retrieving part 6 retrieves an unused spare sector on the same cylinder of a disk 4, and the diagnostic data is written and read into and out of the retrieved sector. Thus the disk controller is diagnosed. Thus, the hardware abnormality even when it occurrs during the working of the hardware can be quickly detected since the disk controller is diagnosed in a period when no command is inputted to the disk controller.

Inventors

• 👤 Takashi Ishii
• 👤 隆 石井

Bibliographic Details