Power device and power device power supply method

摘要

A power device of the present invention makes a plurality of DC/DC converters redundant, and supplies power individually to a plurality of disk drives. Each first DC/DC converter is respectively made correspondent to a subgroup (7A, 7B). One first DC/DC converter (A1) is connected to the disk drives (1) respectively inside one subgroup (7A), and the other first DC/DC converter (A2) is connected to the disk drives inside the other subgroup (7B). A second DC/DC converter (B1, B2) is made correspondent to all of the subgroups (7A, 7B). Second DC/DC converters respectively supply direct-current power to any one disk drive of the disk drives in the subgroups.