Patent ID: 7548502

Claim:
A disk array apparatus, comprising: a connector provided for connection with an external power supply to receive power from the external power supply; an internal power supply section for supplying the power received from the connector after AC/DC conversion; a plurality of disk drive cabinets, each connected to the internal power supply section, each including: a disk drive for receiving the power from the internal power supply section; and a first backup power supply for storing the power provided to the disk drive; a communications adapter connected to the internal power supply section for performing data exchange with an external device, including: a first voltage converter for subjecting the power coming from the internal power supply section to DC conversion to derive a different voltage; a plurality of power consumption circuits for receiving the power as a result of conversion by the first voltage converter; and a second backup power supply for storing the power provided to the first voltage converter; a disk adapter connected to the internal power supply section for controlling data writing or reading to/from the disk drive cabinets, including: a second voltage converter for subjecting the power coming from the internal power supply section to DC conversion to derive a different voltage; a plurality of power consumption circuits for receiving the power as a result of conversion by the second voltage converter; and a third backup power supply for storing the power provided to the second voltage converter; a memory section connected to the internal power supply section for storing data and control information to be written or read to/from the communications adapter and the disk adapter, including: a third voltage converter to subject the power coming from the internal power supply section to DC conversion to derive a different voltage; a plurality of power consumption circuits for receiving the power as a result of conversion by the third voltage converter; and a fourth backup power supply for storing the power provided to the third voltage converter; and a mutual power supply line that is connected to the disk drive cabinets, the communications adapter, the disk adapter, and to the memory section.