> For the complete documentation index, see [llms.txt](https://docs.vergeos-demo.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vergeos-demo.com/knowledge-base/storage-vsan/scaling-up-a-vsan.md).

# Scaling Up a vSAN

{% hint style="warning" %}
**Standard Operating Procedure Required**

Please review the complete [vSAN Scale Up SOP](/run-the-platform/operations/vsan-scale-up-sop.md) for comprehensive preparation, execution, and verification procedures.
{% endhint %}

To scale up a vSAN, follow the steps below. However, before proceeding, ensure that your current vSAN has at least **30% free capacity**.

{% hint style="warning" %}
**Important**

* All drives in a tier must be alike. If a drive of an incorrect size is added to an existing tier, the tier will only be able to use the space of the smallest drive.
* Ensure that your vSAN has at least 30% free capacity unless you are doubling the capacity. If the free space is less than 30% and you are not doubling the drive count, consider scaling out by adding a node or opening up a support ticket for assistance.
  {% endhint %}

{% hint style="info" %}
**Related Documentation**

**Required Reading:** The [vSAN Scale Up Standard Operating Procedure](/run-the-platform/operations/vsan-scale-up-sop.md) contains essential preparation, verification, and troubleshooting steps that must be completed before and after this scale up process.
{% endhint %}

### Steps to Scale Up

1. **Physically add the drives or Fiber Channel LUNs** on the node you want to scale up.
2. **Log in to the host system's UI** and select the appropriate cluster you want to scale up from the **top compute cluster** section on the home page.
3. **Select the node** that you are scaling up.
4. **Refresh the system** to recognize the new drives:
   * Select **Refresh** from the left menu, and choose **Drives & NICs** from the dropdown.
   * Confirm by selecting **Yes**.
5. **Select the Scale Up option** on the left menu.
6. The page will now show the newly inserted drives in an **offline** state. Select the drive(s), then under **Node Drives**, select the **Scale Up** function.
7. **Select the appropriate tier** for the drive(s) and submit.

Upon completion, the screen will refresh and the drives will disappear from the view. Go back to the main page, where you will see the **vSAN tiers** change color to **yellow**, indicating that it is in a repair state. This is expected, and the vSAN will return to a **green/healthy** state after a few minutes, showing the newly added tier or increased space on an existing tier.

Repeat these steps for each node as necessary.

***

{% hint style="info" %}
**Document Information**

* Last Updated: 2025-07-27
* VergeOS Version: 4.13
  {% endhint %}


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