> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ocient.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Maintenance Overview

export const Ocient = "Ocient®";

{Ocient} System Administrators need to perform maintenance for three primary reasons:

* When the Ocient software requires action, such as rebuilding lost or damaged segments
* When firmware or OS software updates are required
* When drive, memory, or system hardware failures occur

The maintenance documentation begins with Ocient software-related maintenance and proceeds to hardware-related maintenance.

* [Guide to Rebuilding Segments](/guide-to-rebuilding-segments)
* [Startup and Shutdown Procedure](/startup-and-shutdown-procedure)
* [Power Safety Recommendations](/power-safety-recommendations)
* [NVMe Drive Firmware Upgrade Process](/nvme-drive-firmware-upgrade-process)
* [Replace an NVMe Node Drive](/replace-an-nvme-node-drive)
* [Expand and Rebalance System](/expand-and-rebalance-system)
* [Replace Nodes](/replace-nodes)
  * [SQL Node Replacement ](/replace-nodes#sql-node-replacement-procedure)
  * [Loader Node Replacement](/replace-nodes#loader-node-replacement-procedure)
  * [Foundation Node Replacement](/replace-nodes#foundation-node-replacement-procedure)
  * [Metadata Node Replacement](/replace-nodes#metadata-node-replacement-procedure)
* [Backup and Restore](/backup-and-restore)