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# Maintenance Overview

> Learn about regular maintenance procedures for Ocient, ensuring system stability and longevity.

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**](/guides/system-administration/maintenance-overview/guide-to-rebuilding-segments)
* [**Startup and Shutdown Procedure**](/guides/system-administration/maintenance-overview/startup-and-shutdown-procedure)
* [**Power Safety Recommendations**](/guides/system-administration/maintenance-overview/power-safety-recommendations)
* [**NVMe Drive Firmware Upgrade Process**](/guides/system-administration/maintenance-overview/nvme-drive-maintenance/nvme-drive-firmware-upgrade-process)
* [**Replace an NVMe Node Drive**](/guides/system-administration/maintenance-overview/nvme-drive-maintenance/replace-an-nvme-node-drive)
* [**Replace Nodes**](/guides/system-administration/maintenance-overview/replace-nodes)
  * [**SQL Node Replacement**](/guides/system-administration/maintenance-overview/replace-nodes)
  * [**Loader Node Replacement **](/guides/system-administration/maintenance-overview/replace-nodes)
  * [**Foundation Node Replacement **](/guides/system-administration/maintenance-overview/replace-nodes)
  * [**Metadata Node Replacement**](/guides/system-administration/maintenance-overview/replace-nodes)
* [**Backup and Restore**](/guides/system-administration/maintenance-overview/backup-and-restore)

> Learn about regular maintenance procedures for Ocient, ensuring system stability and longevity.