# Reinstall your servers

{% hint style="danger" %}
Warning: The operation will always cause a **full disk wipe**. All data will be lost! Proceed with caution.
{% endhint %}

To reinstall your servers, use the endpoint provided in the [API documentation](https://docs.i3d.net/api/api_flexmetal#patch-v3-flexmetal-servers-uuid). Ensure you obtain the required UUID from the POST /servers response body. You may pass optional parameters such as:

* `name` (hostname)
* `os` (operating system), which must include a slug property. If the OS is not Windows or Talos, the `sshKey` is mandatory.
* `kernelParam` (optional)
* `partitions` (optional)
* `sshKey` (essential if the OS is not Windows or Talos)
* `postInstallScript` (must be a valid Shell script)

### Usage Scenarios

{% tabs %}
{% tab title="Reinstall with the Initially Requested OS" %}

* **Parameters:**
  * `name`: (string)\
    Optionally include `kernelParam`, `partitions`, `sshKey`
* **Behavior:**\
  The originally provisioned OS will be reinstalled, including any specified `kernelParam`, custom `partitions`, and/or `sshKey`.
  * If you pass a new `sshKey`, it replaces the original.
    {% endtab %}

{% tab title="Reinstall with a Different OS" %}

* **Parameters:**
  * `os`: (object)\
    Fully specify the OS you want to install.
* **Behavior:**\
  The originally provisioned OS will be replaced by the provided OS object, which is installed instead.
  {% endtab %}

{% tab title="Reinstall with Specific SSH Keys" %}

* **Parameters:**
  * `sshKey`: (array)
* **Behavior:**\
  The originally provisioned OS is reinstalled, but **only** the passed SSH keys are injected (not the default/original ones).
  {% endtab %}
  {% endtabs %}

**Example PATCH request with all of the options**

```json
{
  "name": "host.example.com",
  "os": {
    "slug": "ubuntu-2404-lts",
    "kernelParams": [
      {
        "key": "test-kernel-param-key",
        "value": "test-kernel-param-value"
      }
    ],
    "partitions": [
      {
        "target": "/custom",
        "filesystem": "ext4",
        "size": 10240
      }
    ]
  },
  "sshKey": [
    "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBHo8IaPkQ6UnDZvi4F4RBSouRa6Gtysdg2EF+SIXheVF2SGBQ2uH7RfDjXRfvq4VpHJrKYs4kWfNoHQg8ZG6PH4= ecdsa-key-20240131"
  ],
  "postInstallScript": "#!/bin/bash\necho \"Hello world!\" > /root/test.txt"
}

```


---

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