# Failover Procedure - One Site ### Consideration 1. Nodeum has been erased or alterated 2. Configuration in Nodeum has been erased or alterated 3. Caching Disk is not impacted. ### Prerequesites **Step 1 :** Activate the backup feature, then the backup is done in a regular basis (defined during the backup configuration). Be careful to export this backup. **Step 2 :** Move the generated backup to external devices. ### In case of failure **Step 1** : Reinstall Nodeum from scratch in using the last Ansible packages **Step 2** : Copy the generated [backup](/data-archiving/system-reliability/backup-and-restore.md#backup) into a folder in Nodeum server. **Step 3** : Restore the backup in using the appropriated procedure. **Step 4** : The server is now back online. --- # Agent Instructions: 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.nodeum.io/data-archiving/system-reliability/failover-procedure-one-site.md?ask= ``` 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.