Disk Array Control Apparatus and Information Processing Apparatus
First Claim
1. A disk array control apparatus comprising:
- an expansion board inserted into an expansion slot provided in a main board provided in an information processing apparatus comprising a power supply device and a power supply monitoring circuit outputting an initialization signal when the output voltage of the power supply device becomes lower than a set value;
a disk array controller mounted on the expansion board;
a volatile memory configured to temporarily store data sent or received by the disk array controller;
a first power supply generation circuit configured to generate second power having a voltage required to drive the volatile memory from first power supplied from the main board;
a second power supply generation circuit configured to generate fourth power having a voltage required to drive the volatile memory from power having a higher voltage selected from the first power and third power supplied from a battery mounted on the expansion board;
a first switch configured to interpose in a path through which the first power supply generation circuit is connected to the volatile memory;
a second switch configured to interpose in a path through which the second power supply generation circuit is connected to the volatile memory; and
a power supply switching control unit having a logic circuit which controls on/off switching of the first switch and the second switch based on a state of the initialization signal.
1 Assignment
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Accused Products
Abstract
According to one embodiment, a disk array control apparatus includes a volatile memory configured to temporarily store data sent or received by a disk array controller, a first power supply generation circuit configured to generate second power to drive the volatile memory from first power, a second power supply generation circuit configured to generate fourth power to drive the volatile memory from power having a higher voltage selected from the first power and third power supplied from a battery, a first switch configured to interpose in a path flowing the second power, a second switch configured to interpose in a path through which flowing the fourth power, and a power supply switching control unit includes a logic circuit which controls on/off switching of the first switch and the second switch based on a state of a initialization signal.
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Citations
8 Claims
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1. A disk array control apparatus comprising:
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an expansion board inserted into an expansion slot provided in a main board provided in an information processing apparatus comprising a power supply device and a power supply monitoring circuit outputting an initialization signal when the output voltage of the power supply device becomes lower than a set value; a disk array controller mounted on the expansion board; a volatile memory configured to temporarily store data sent or received by the disk array controller; a first power supply generation circuit configured to generate second power having a voltage required to drive the volatile memory from first power supplied from the main board; a second power supply generation circuit configured to generate fourth power having a voltage required to drive the volatile memory from power having a higher voltage selected from the first power and third power supplied from a battery mounted on the expansion board; a first switch configured to interpose in a path through which the first power supply generation circuit is connected to the volatile memory; a second switch configured to interpose in a path through which the second power supply generation circuit is connected to the volatile memory; and a power supply switching control unit having a logic circuit which controls on/off switching of the first switch and the second switch based on a state of the initialization signal. - View Dependent Claims (2, 3, 4)
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5. An information processing apparatus comprising:
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a power supply device configured to output first power; a main board; a first power supply circuit provided on the main board and configured to generate second power from first power supplied from the power supply device; a power supply monitoring circuit configured to output an initialization signal when the voltage of the first power is less than a set value; an expansion slot provided in the main board; and a power supply switching control unit comprising an expansion board inserted into the expansion slot, a disk array controller mounted on the expansion board, a volatile memory configured to temporarily stores data sent or received by the disk array controller, a first power supply generation circuit configured to generate second power having a voltage required to drive the volatile memory from the first power supplied from the main board, a second power supply generation circuit configured to generate fourth power having a voltage required to drive the volatile memory from power having a higher voltage selected from the first power and third power supplied from a battery mounted on the expansion board, a first switch configured to interpose in a path through which the first power supply generation circuit is connected to the volatile memory, a second switch configured to interposed in a path through which the second power supply generation circuit is connected to the volatile memory, and a logic circuit configured to receive the initialization signal and controls on/off switching of the first switch and the second switch in accordance with the initialization signal. - View Dependent Claims (6, 7, 8)
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Specification