Patent ID: 7279810

Claim:
A storage system comprising: a drive for driving a storage device to store data; and a controller for controlling input and output of the data between a host system and the drive, the drive and the controller being connected to each other via a cable; wherein the controller includes: a first power supply unit for outputting an emergency power supply voltage when a power failure occurs at the drive; a first multiplexing unit for multiplexing the emergency power supply voltage output from the first power supply unit, with a first signal to be sent to the drive and sending the resultant emergency power supply voltage via the cable to the drive; and a failure processing unit for executing specified processing in response to power failure information sent from the drive via the cable; and wherein when a power failure occurs at the drive, the drive is powered with the emergency power supply voltage sent from the controller; the drive including: a failure detecting unit for outputting the power failure information; and a second multiplexing unit for multiplexing the power failure information output from the failure detecting unit with a second signal to be sent to the controller and sending the resultant power failure information via the cable to the controller.