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# About unmanaged devices

An unmanaged device is a device, such as a server, enclosure, KVM (keyboard, video and mouse) switch, in-rack monitor/keyboard, or router, that occupies space in a rack and/or consumes power but is not managed by the appliance.

Unmanaged devices are created automatically to represent devices that are attached to an Intelligent Power Distribution Unit (iPDU) using Power Discovery Services connections. BladeSystem enclosures and ProLiant DL series servers are in the `unmanaged` or `unsupported` state. These will be represented as unmanaged enclosures and servers and are not `unmanaged-devices` resources.

When creating an unmanaged device, you provide its name, model description, height in U-slots and maximum power requirements. These values are used in power and cooling capacity analysis and enable alerts to be generated identify potential power and cooling issues.

Because there is no communication to the unmanaged device, the status is `disabled` unless appliance-generated alerts identify issues to be addressed.

For purposes of power configuration, unmanaged devices are assumed to have two power supply connections to support redundant power. These are identified as power supplies 1 and 2. If an unmanaged device does not support redundant power, connect only power supply 1, then clear the alert about lack of redundant power to the device.

For devices that are not discovered through Power Discovery Services connections, you can manually add these devices to the appliance for tracking, inventory, and power management purposes.

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