Storage control system and control method for storage control system

A control method for a storage control system having a plurality of storage devices for which a device state is set in accordance with a combination of respective signal values of a plurality of first signals respectively inputted via a plurality of signal lines;

• a first setting circuit which is connected to said storage device via said signal lines, and which respectively outputs said first signal over said signal lines in accordance with an inputted second signal;
• a second setting circuit which is logical-OR connected to said first setting circuit, and which respectively outputs said first signal over said signal lines in accordance with said inputted second signal;
• a first device controller for respectively outputting said first signals from said first setting circuit by furnishing said second signal to said first setting circuit;
• and
• a second device controller for respectively outputting said first signals from said second setting circuit by furnishing said second signal to said second setting circuit,
• wherein said first signals take a signal value of either one of an open state or a low-voltage state,
• wherein said device state comprises an initial state and a plurality of other states, and a combination of signal values of said first signals for setting said initial state, and a combination of signal values of said first signals for respectively setting said plurality of other states are set in advance so as to differ from one another, and furthermore, and
• wherein said control method comprises:
• a failure detection step of detecting whether or not a failure has occurred in either of said first device controller or said second device controller;
• and
• a setting step in which, when said failure is detected, a normal device controller in which said failure has not been detected outputs over said signal lines a desired combination of signal values of said first signals using a setting circuit, of either said first setting circuit or said second setting circuit, which is connected to said normal device controller.

A control method for a storage control system having a plurality of storage devices for which a device state is set in accordance with a combination of respective signal values of a plurality of first signals respectively inputted via a plurality of signal lines;

• a first setting circuit which is connected to said storage device via said signal lines, and which respectively outputs said first signal over said signal lines in accordance with an inputted second signal;
• a second setting circuit which is logical-OR connected to said first setting circuit, and which respectively outputs said first signal over said signal lines in accordance with said inputted second signal;
• a first device controller for respectively outputting said first signals from said first setting circuit by furnishing said second signal to said first setting circuit;
• and
• a second device controller for respectively outputting said first signals from said second setting circuit by furnishing said second signal to said second setting circuit,
• wherein said first signals take a signal value of either one of an open state or a low-voltage state, and
• wherein said device state comprises an initial state and a plurality of other states, and a combination of signal values of said first signals for setting said initial state, and a combination of signal values of said first signals for respectively setting said plurality of other states are set in advance so as to differ from one another, and furthermore,
• said control method comprises:
• a failure detection step of detecting whether or not a failure has occurred in either of said first setting circuit or said second setting circuit;
• and
• a setting step in which, when said failure is detected, a normal setting circuit in which said failure has not been detected outputs over said signal lines a desired combination of signal values of said first signals.