Storage apparatus

1. A storage apparatus mounted in a rack, the storage apparatus comprising:

a power supply that supplies power;

a battery that is placed on an apparatus front surface side of the power supply and supplies power during a backup operation;

a drive mounting unit that is placed further toward the apparatus front surface side than the battery and that mounts a plurality of drives for storing data;

a controller that controls an entirety of the apparatus;

a midplane that is placed between the battery and the drive mounting unit and relays signals and power among the power supply, the battery, the drive mounting unit, and the controller; and

a sub-midplane that is placed between the midplane and the battery and relays signals and power from the power supply and the battery to the midplane, wherein

the midplane and the sub-midplane are coupled to each other by a bus bar for supplying the power from the power supply to the midplane, and by one or more electric wires for transmitting signals and/or power other than the power of the power supply from the power supply and the battery,

the storage apparatus further comprises an air passage that is capable of supplying cooling air from an intake port, formed on the apparatus front surface, to the battery without allowing the cooling air to pass around a periphery of the drives.

2. The storage apparatus according to claim 1 , wherein

at least one of the sub-midplane and the midplane has, on an opposing surface thereof, a plurality of vias, and

the bus bar is coupled to at least one of the sub-midplane and the midplane so as to contact with one or more of the plurality of vias.

3. The storage apparatus according to claim 1 , further comprising a blocking unit that blocks mixing of air flowing through the air passage and air that has passed around a periphery of the drives and cooled the drives.

4. The storage apparatus according to claim 3 , wherein the blocking unit closes a space between the sub-midplane and the midplane.

5. The storage apparatus according to claim 3 , wherein the blocking unit blocks mixing of the air flowing through the air passage and air passing around a periphery of the bus bar.

6. The storage apparatus according to claim 1 , wherein the drives are SSDs (Solid State Drive) coupled by NVMe (Non-Volatile Memory Express).

7. The storage apparatus according to claim 1 , wherein the intake port is formed next to an end of the drive mounting unit at the apparatus front surface.

8. The storage apparatus according to claim 1 , comprising two systems each including the power supply, the battery, the sub-midplane, and the controller.

9. The storage apparatus according to claim 8 , wherein the power supply, the battery, and the sub-midplane are arranged on both sides of the controller.

10. The storage apparatus according to claim 1 , wherein

a plurality of electric wires for the signals and power from the power supply are coupled to the battery, and

the battery is coupled to the sub-midplane by a common electric wire for a signal that can be sharing an electric wire with an signal of the power supply.

11. The storage apparatus according to claim 1 , wherein

the midplane and the sub-midplane are coupled to each other by a pair of the bus bars for supplying the power from the power supply to the midplane and by a connector that includes a plurality of electric wires for transmitting signals and/or power other than the power of the power supply from the power supply and the battery, and

the connector is placed, at a position closer to outside of the storage apparatus than a high-voltage bus bar out of the bus bars that supplies a high voltage.