> For the complete documentation index, see [llms.txt](https://docs.trilio.io/openstack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trilio.io/openstack/t4o-5.x/upgrading-to-t4o-5.x-from-older-supported-versions.md).

# Upgrading to T4O-5.x from older supported versions

- [Supported Trilio Upgrade Path](https://docs.trilio.io/openstack/t4o-5.x/upgrading-to-t4o-5.x-from-older-supported-versions/upgrade-triliovault.md)
- [Upgrading on RHOSP](https://docs.trilio.io/openstack/t4o-5.x/upgrading-to-t4o-5.x-from-older-supported-versions/upgrading-on-rhosp.md)
- [Upgrading on Kolla](https://docs.trilio.io/openstack/t4o-5.x/upgrading-to-t4o-5.x-from-older-supported-versions/upgrading-on-kolla.md)
- [Enabling T4O 4.1 or older backups when using NFS backup target](https://docs.trilio.io/openstack/t4o-5.x/upgrading-to-t4o-5.x-from-older-supported-versions/enabling-tvo-4.1-or-older-backups-when-using-nfs-backup-target.md)