# US 7,613,940 B2 · Method and apparatus for controlling power supply to recording devices of redundant-array-of-independent-disks group

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,613,940 B2
- Document ID: US7613940B2
- Status: Granted
- Kind: B2
- Application number: 11/412,781
- Filed: 2006-04-28
- Published: 2007-07-19
- Granted: 2009-11-03
- Earliest claimed: 2006-01-16
- Assignees: Fujitsu Limited
- Inventors: Ryohei Nishimiya
- Web page: https://patentgrep.com/patent/US7613940B2

## CPC

- G06F 1/3203: Power management, i.e. event-based initiation of a power-saving mode
- G06F 1/3268: {Power saving in hard disk drive}
- Y02D 10/00: Energy efficient computing, e.g. low power processors, power management or thermal management
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

A power supply unit supplies power for each of a plurality of power supply groups configured to supply the power to a first recording device that belongs to a first redundant-array-of-independent-disks group and a second recording device that belongs to a second redundant-array-of-independent-disks group. The second redundant-array-of-independent-disks group includes recording devices different from those of the first redundant-array-of-independent-disks group. A power-supply control unit cuts off, when a malfunctioning occurs in a specific recording device, power supply to a power supply group that includes the specific recording device.

## Claims

### Claim 1

An apparatus for controlling power supply to recording devices of a redundant-array-of-independent-disks group, the apparatus comprising:
a power supply unit that supplies power for each of a plurality of power supply groups configured to supply the power to a first recording device that belongs to a first redundant-array-of-independent-disks group and a second recording device that belongs to a second redundant-array-of-independent-disks group, the second redundant-array-of-independent-disks group including recording devices different from those of the first redundant-array-of-independent-disks group; and
a power-supply control unit that cuts off, when a malfunction occurs in a specific recording device, power supply to a power supply group that includes the specific recording device, wherein
each of the power supply groups includes
at least one recording device that belongs to the first redundant-array-of-independent-disks group; and
at least one recording device that belongs to the second redundant-array-of-independent-disks group.

### Claim 2 (depends on 1)

The apparatus according to claim 1, wherein
the power-supply control unit cuts off, when the malfunction occurs in the specific recording device, power supply to the power supply group that includes the specific recording device, while continuing power supply to other power supply groups that do not include the specific recording device.

### Claim 3

A method of controlling power supply to recording devices of a redundant-array-of-independent-disks group, the method comprising:
supplying power for each of a plurality of power supply groups configured to supply the power to a first recording device that belongs to a first redundant-array-of-independent-disks group and a second recording device that belongs to a second redundant-array-of-independent-disks group, the second redundant-array-of-independent-disks group including recording devices different from those of the first redundant-array-of-independent-disks group; and
cutting off, when a malfunction occurs in a specific recording device, power supply to a power supply group that includes the specific recording device, wherein
each of the power supply groups includes
at least one recording device that belongs to the first redundant-array-of-independent-disks group; and
at least one recording device that belongs to the second redundant-array-of-independent-disks group.

### Claim 4 (depends on 3)

The method according to claim 3, wherein
the cutting off includes cutting off, when the malfunction occurs in the specific recording device, power supply to the power supply group that includes the specific recording device, while continuing power supply to other power supply groups that do not include the specific recording device.