---
title: "Power Cycling Hardware"
slug: "power-cycling-hardware"
tags: ["5.4"]
updated: 2026-10-28T01:53:34Z
published: 2026-10-28T01:53:34Z
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

## Power On or Off a CNode

### Switch on the power from the VAST Web UI

1. Connect to the VAST Web UI. From the menu, (click ![menu_button.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-cefc1f3d9a04c4d52ab88c0aaf9f0192(36).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D) ), select Infrastructure > CNodes.
2. At the right side of the necessary CNode name, select (![3dots_menu.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-894bd6e65839a9f052cb1b9368e56c92(9).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D)) and then (![3dots_menu.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-b291f3c09c45ce5a298f55c7d9aa1b6d(34).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D) ) Power On.

### Switch off the power from the VAST Web UI

Select ![3dots_menu.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-894bd6e65839a9f052cb1b9368e56c92(9).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D) at the right side of the necessary CNode and then select (![Power_Off_Icon.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-e4c361cc8e6eda7d493422e7bc1093f1(9).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D)) Power Off.

### Switch on the power from the VAST CLI

To switch on the power from the VAST CLI, use the [cnode activate](/docs-5-4/docs/en/cnode-activate) command with the `--power-on` option.cnode activate

### Switch off the power from the VAST CLI

To switch off the power from the VAST CLI, use the [cnode deactivate](/docs-5-4/docs/en/cnode-deactivate) command with the `--power-off` option.cnode deactivate

## Power On or Off a DNode

### Switch on the power from the VAST Web UI

1. Connect to the VAST Web UI. From the menu, (click ![menu_button.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-cefc1f3d9a04c4d52ab88c0aaf9f0192(36).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D) ), select Infrastructure > DNodes.
2. At the right side of the necessary DNode name, select (![3dots_menu.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-894bd6e65839a9f052cb1b9368e56c92(9).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D)) and then (![3dots_menu.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-b291f3c09c45ce5a298f55c7d9aa1b6d(34).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D) ) Power On.

### Switch off the power from the VAST Web UI

Select ![Power_Off_Icon.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-e4c361cc8e6eda7d493422e7bc1093f1(9).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D) at the right side of the necessary DNode and then select Power Off.

### Switch on the power from the VAST CLI

To switch on the power from the VAST CLI, use the [dnode activate](/docs-5-4/docs/en/dnode-activate) command with the `--power-on` option.dnode activate

### Switch off the power from the VAST CLI

To switch off the power from the VAST CLI, use the [dnode deactivate](/docs-5-4/docs/en/dnode-deactivate) command with the `--power-off` option.:dnode deactivate

## Power On or Off a DTray

### Switch on the power from the VAST Web UI

1. Connect to the VAST Web UI. From the menu, (click ![menu_button.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-cefc1f3d9a04c4d52ab88c0aaf9f0192(36).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D) ), select Infrastructure > DTrays.
2. From the Actions menu Select (![3dots_menu.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-b291f3c09c45ce5a298f55c7d9aa1b6d(34).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D) ) Power On at the right side of the necessary DTray.

### Switch off the power from the VAST Web UI

Select (![Power_Off_Icon.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-e4c361cc8e6eda7d493422e7bc1093f1(9).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A49%3A19Z&se=2026-11-08T10%3A49%3A19Z&sr=c&sp=r&sig=va6RDViNbHu5eNa77oUmAMVxAcPO%2BPE4RaWQex1EbDY%3D)) at the right side of the necessary DTray and then select Power Off .

### Switch on the power from the VAST CLI

To switch on the power from the VAST CLI use the [dnode activate](/docs-5-4/docs/en/dnode-activate) command with the `--power-on` option.dnode activate

### Switch off the power from the VAST CLI

To switch off power from the VAST CLI use the [dnode deactivate](/docs-5-4/docs/en/dnode-deactivate) command with the `--power-off` option.dnode deactivate