---
title: "Power Cycling Hardware"
slug: "power-cycling-hardware"
updated: 2026-10-27T17:23:32Z
published: 2026-10-27T17:23:32Z
canonical: "docs.vastdata.com/power-cycling-hardware"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vastdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Power Cycling Hardware

VMS enables you to switch power for CNodes, DNodes and DTrays on and off from the VAST Web UI and from the VAST CLI.

## Powering On and Off from the VAST Web UI

1. On the Infrastructure page, select the CNodes, DNodes or DTrays tab.
2. Right-click the CNode, DNode or DTray that you need to power on or off and select Power On or Power Off.

## Powering On and Off from the VAST CLI

To power on a CNode, use the [cnode activate](/docs-5-3/docs/en/cnode-activate) command with the `--power-on` option.

To power off a CNode, use the [cnode deactivate](/docs-5-3/docs/en/cnode-deactivate) command with the `--power-off` option.

To power on a DNode, use the [dnode activate](/docs-5-3/docs/en/dnode-activate) command with the `--power-on` option.

To power off a DNode, use the [dnode deactivate](/docs-5-3/docs/en/dnode-deactivate) command with the `--power-off` option.

To power on a DTray, use the [dtray activate](/docs-5-3/docs/en/dtray-activate) command with the `--power-on` option.

To power off a DTray, use the [dtray deactivate](/docs-5-3/docs/en/dtray-deactivate) command with the `--power-off` option.