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Proxmox Backup Server 3.1 released

What’s new in Proxmox Backup Server 3.1

  • Proxmox Backup Server is based on Debian 12.2 “Bookworm”, but uses the newer Linux kernel 6.5 as stable default. The backup platform comes with ZFS 2.2.0 but already includes important fixes from the upcoming ZFS version 2.2.2.
  • Support for Secure Boot: Like Proxmox Virtual Environment, this version is now compatible with Secure Boot. This security feature is designed to protect the boot process of a computer by ensuring that only software with a valid digital signature launches on a machine. Proxmox Backup Server now includes a signed shim bootloader trusted by most hardware's UEFI implementations. This allows installing it in environments with Secure Boot active. Existing Backup Server installations can be switched over to Secure Boot without reinstallation.
  • Support for local sync jobs: A local sync job enables synchronization of backups between local datastores. Sync jobs can now pull contents not only from remote Proxmox Backup Server instances, but also from local datastores.
  • The Proxmox Tape Backup system provides an easy way to copy datastore content to tapes. This version has improved compatibility with LTO 9 tapes and with certain tape libraries.
  • The web interface is now available in Croatian and Georgian; other translations have been improved thanks to community contributions.

Proxmox Backup Server seamlessly integrates into Proxmox Virtual Environment – users just need to add the storage for the Proxmox Backup Server as a new storage backup target to Proxmox VE. The software is published under the GNU AGPLv3 license.


The centrally managed software stack Proxmox Backup Server 3.1 is now available for download at https://www.proxmox.com/downloads. The downloadable ISO image can be quickly installed on bare-metal using the installation wizard. Distribution upgrades from older versions of Proxmox Backup Server are possible via APT. It is also possible to install Proxmox Backup Server on top of Debian.

License: Proxmox Backup Server is free and open-source software, published under the GNU AGPLv3.

Support Subscriptions: For enterprise users, Proxmox Server Solutions GmbH offers a subscription-based support model, which provides access to the extensively tested Enterprise Repository, with regular updates via the web interface, as well as technical support on a subscription basis. Prices start at EUR 495 per server, including unlimited backup storage and unlimited backup-clients.

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