--- title: "Power Cycling Hardware" slug: "power-cycling-hardware" tags: ["5.5"] updated: 2026-10-27T23:00:54Z published: 2026-10-27T23:00:54Z 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 > [!NOTE] > Note > > When you choose the option to power-cycle a node, the node will automatically be activated after the power cycling. ## 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(68).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%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(18).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%3D)) and then (![3dots_menu.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-b291f3c09c45ce5a298f55c7d9aa1b6d(65).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%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(18).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%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(18).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%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-5-5/docs/cnode-activate) command with the `--power-on` option. ### Switch off the power from the VAST CLI To switch off the power from the VAST CLI, use the [cnode deactivate](/docs-5-5/docs/cnode-deactivate) command with the `--power-off` option. ## 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(68).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%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(18).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%3D)) and then (![3dots_menu.png](https://cdn.us.document360.io/89b91113-5dc6-49db-86ec-57b16dc8ce56/Images/Documentation/img-b291f3c09c45ce5a298f55c7d9aa1b6d(65).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%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(18).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%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-5-5/docs/dnode-activate) command with the `--power-on` option. ### Switch off the power from the VAST CLI To switch off the power from the VAST CLI, use the [dnode deactivate](/docs-5-5/docs/dnode-deactivate) command with the `--power-off` option. ## 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(68).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%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(65).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%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(18).png?sv=2026-02-06&spr=https&st=2026-11-08T09%3A16%3A12Z&se=2026-11-08T10%3A16%3A12Z&sr=c&sp=r&sig=%2FfFa1I7VOMM9hEftFEwAsVgCZqlHu2S%2FDIlkprYjN3c%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-5-5/docs/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-5-5/docs/dnode-deactivate) command with the `--power-off` option.dnode deactivate