Hitachi, Ltd.

Ryohei Oguro

Yosuke Tsuyuki

A storage apparatus writes data to a storage drive or reads data from a storage drive in response to an I/O request sent from a server. The storage apparatus includes a plurality of AC-DC power supplies supplying the storage drive with drive power is provided with a plurality of power supply paths provided for the respective AC-DC power supplies. A plurality of gate units are provided to the respective power supply paths and configured to stop supplying drive power to the storage drive through the corresponding power supply path when detecting voltage abnormality in the drive power supplied from the AC-DC power supply to the storage drive. The power supply paths allow each of the storage drives belonging to a same RAID group to receive the supply of the drive power from the AC-DC power supplies through different power supply paths, respectively.

Storage apparatus

A storage apparatusthat writes data to a storage driveor reads data from a storage drivein response to an I/O request sent from a server apparatus, and includes a plurality of AC-DC power supplies to supply the storage drivewith drive power is provided with a plurality of power supply paths provided for the respective AC-DC power suppliesconfigured to supply the storage drivewith drive power from the AC-DC power supplies, respectively and a plurality of gate units provided to the respective power supply paths and configured to stop supplying drive power to the storage drivethrough the corresponding power supply path when detecting voltage abnormality in the drive power supplied from the AC-DC power supplyto the storage drive. For example, the power supply paths are provided to allow each of the storage drivesbelonging to a same RAID groupto receive the supply of the drive power from the AC-DC power suppliesthrough different power supply paths, respectively.

A storage system comprises multiple physical storage devices, and a power supply for the multiple physical storage devices. Each physical storage device requires an input of a first voltage and an input of a second voltage that is a lower voltage than the first voltage. The power supply comprises a first power supply circuit that is made redundant and a second power supply circuit that is made redundant. Each first power supply circuit outputs a first voltage, which is input to the respective physical storage devices. Each second power supply circuit outputs a second voltage to a storage device group (two or more physical storage devices of the multiple physical storage devices) corresponding to this second power supply circuit. Each second power supply circuit is isolated from a circuit board comprising the first power supply circuit.

Growing community of inventors

Hadano, Japan

Ryohei Oguro