> 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/identifying-a-failed-disk-drive.md).

# Identifying a Failed Disk Drive

VergeOS offers a diagnostic function that allows system administrators to turn a disk drive's LED light on or off, making it easier to physically identify a failed or problematic drive. Follow the steps below to locate a failed disk drive for replacement.

## Steps to Identify a Failed Disk

1. **Log in** to the VergeOS UI and navigate to the **dashboard** of the node where the failed disk resides.
2. On the **Node Dashboard**, locate and select **Diagnostics** from the left-hand column.
3. In the **Diagnostics** page, change the **Query** to **LED Control (Drive)**.
4. In the **LED Control (Drive)** details section:
   * **Path**: Enter the path to the drive you want to locate (e.g., `/dev/sdb`). If you're unsure of the path, check the system alerts and logs for recent error or warning messages.
   * **State**: Set the LED state to `On`, then click **Send** to activate the LED light on the drive.
5. **Locate the drive** with the active LED indicator in your physical server.
6. Once the drive has been identified and replaced, set the **State** to `Off` and click **Send** to deactivate the LED light.

{% hint style="info" %}
**For detailed instructions on drive replacement, refer to the Maintenance section in the inline help under** [**Drive Replacement**](/run-the-platform/system-administration/drive-replacement.md)**. This section guides you through the entire process.**
{% endhint %}

***

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

* Last Updated: 2024-08-29
* vergeOS Version: 4.12.6
  {% endhint %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.vergeos-demo.com/knowledge-base/storage-vsan/identifying-a-failed-disk-drive.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.