Patent ID: 7360107
Filing Date: 2008-04-15
Classification: G06F,Y02D

Abstract:
1. A disk array apparatus that stores data in and reads out data from a recording medium by using power supplied from a main power supply line, the disk array apparatus comprising: a power supply unit that generates a first voltage enough to drive the disk array apparatus from power supplied from an external power, and that supplies the first voltage to the main power supply line; a battery that is charged by a charging voltage generated from the first voltage supplied from the main power supply line; and a voltage supply circuit that is arranged between the battery and the main power supply line, and that supplies a second voltage to the main power supply line when voltage of the battery is smaller than the charging voltage, whereas that supplies a voltage obtained by discharging of the battery to the main power supply line when the voltage of the battery is larger than the charging voltage, wherein the second voltage is generated by limiting the charging voltage to a smaller level than the first voltage.