# Upgrade Trilio Starting Trilio for Openstack 4.0 does Trilio for Openstack allow in-place upgrades. The following versions can be upgraded to each other: | Old | New | | --------------- | ----------------- | | 4.0 GA (4.0.92) | 4.0 SP1 (4.0.115) | | 4.0 GA (4.0.92) | 4.1 latest hotfix | | 4.0 GA (4.0.92) | 4.2 GA (4.2.64) | | 4.1 GA (4.1.94) | 4.1 latest Hotfix | | 4.1 Hotfix | 4.1 latest Hotfix | | 4.1 GA (4.1.94) | 4.2 GA (4.2.64) | | 4.1 Hotfix | 4.2 GA (4.2.64) | | 4.2 GA (4.2.64) | 4.3.0 | | 4.2 Hotfix | 4.3.0 | The upgrade process contains upgrading the Trilio appliance and the Openstack components and is dependent on the underlying operating system. {% hint style="warning" %} The Upgrade of Trilio for Canonical Openstack is managed through the charms. {% endhint %} ## Enable mount-bind for NFS In T4O 4.2 and later releases, calculation of the mount point has been changed.\ It is necessary to set up the mount-bind to make T4O 4.1 or older backups available for T4O 4.2 and T4O 4.2 onwards releases. Please follow [this documentation](/openstack/t4o-4.3/deployment/enabling-tvo-4.1-or-older-backups-when-using-nfs-backup-target.md) to set up the mount bind for Canonical OpenStack. --- # 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.trilio.io/openstack/t4o-4.3/deployment/upgrade-triliovault.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.