Patent ID: 7441130

Claim:
A storage controller for performing data communication with a host system based on fibre channel protocol and controlling data input/output to or from a SATA disk drive, comprising: an FC/SATA converter powered by a main power supply; a resource management processor powered by a standby power supply; a switching device for controlling the on/off state of the main power supply; a cache memory for temporarily storing data to be input or output to or from the SATA disk drive; and a battery for supplying the cache memory with backup power when the main power supply is off, wherein the resource management processor controls the power supply from the main power supply to the FC/SATA converter, the main power supply and the standby power supply are two power supply channels branching from a single power supply, and the FC/SATA converter is powered by the main power supply from a branch power supply line that branches from a power supply line supplying the cache memory with power from the main power supply, and wherein when the main power supply is off, the power supply from the branch power supply line to the FC/SATA converter is interrupted by the switching device being turned off.