Linux for x360Recover

Written By Tami Sutcliffe (Super Administrator)

Updated at June 3rd, 2024

Support for backup and recovery of Linux protected systems

Our x360Recover agent for Linux has been activated for all devices. 

Linux appliance 12.3.0 features:

  • Full image-based backups (for appliances and Direct-to-Cloud)
  • Local cache for Direct-to-Cloud
  • Analysis Tool support
  • Agent orchestration (for configuration management)
  • File and folder recovery
  • Bare Metal Restore  (BMR)
  • Full image recovery (via BMR)

Where to download the Linux agent 

Appliances (10.18.0 or newer) will see the Linux agent installation on the Downloads page:

Vaults (12.2.0 or higher) can find the Linux agent installation for Direct-to-Cloud on the Clients page:


x360Recover – Supported Configurations for Linux

With appliance version 12.3.0 and newer, x360Recover provides support for backup and recovery of protected systems running various versions of Linux operating systems.

The following protected system configurations for Linux are supported:

Supported Linux operating systems


Debian Linux

  • Debian 10.x LTS (Buster)
  • Debian 11.x LTS (Bullseye)
  • Debian 12.x LTS (Bookworm)1

Red Hat Enterprise Linux

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9**

Red Hat-based derivative Linux distributions

  • AlmaLinux versions 7, 8, and 92
  • CentOS version 7
  • Oracle Linux versions 7, 8, and 92
  • Rocky Linux versions 7, 8, and 92

Ubuntu Linux

  • 18.04 LTS (Bionic)
  • 20.04 LTS (Focal)
  • 22.04 LTS (Jammy)

Ubuntu-based derivative Linux distributions

  • ElementaryOS versions 6 and 71
  • Linux Mint versions 16.x and 17.x
  • ZorinOS version 16.x

Supported networking

  • 1G Network adapters and switches
  • 10G Network adapters and switches


Supported filesystems

  • Fat 16/32
  • Ext 2/3/4
  • XFS
  • NTFS1


Supported database application services

  • DB2
  • MySQL
  • Microsoft SQL Server for Linux
  • Oracle DB
  • Postgresql


Supported Virtual Disk formats

  • VMDK (VMware ESX/ESXi 3.x-6.x)
  • VMDK (VMware Workstation / Fusion)
  • VHD for Azure (Microsoft Azure)
  • VHD (Microsoft Hyper-V Gen-1 / Xen)
  • VHDX (Microsoft Hyper-V Gen-2)
  • VDI (VirtualBox)
  • QCOW2 (KVM)
  • RAW (KVM)


Supported DR recovery mechanisms

  • File and Folder Recovery
  • Bare-Metal Restore
  • Virtual Disk Export3
  • iSCSI Export3
  • Direct Virtualization3


Supported disk and boot configurations

  • Basic Disks with MBR/Legacy BIOS
  • Basic Disks with GPT/EFI BIOS
  • LVM Disks with Legacy BIOS4
  • LVM Disks with EFI BIOS4
  • LVM Disks with Legacy BIOS (Encrypted)4
  • LVM Disks with EFI BIOS (Encrypted)4

1 Requires Agent for Linux 3.5.0+
2 Due to a fundamental XFS filesystem incompatibility issue with Linux kernel versions less than 5.14.0, Red Hat Enterprise Linux 9 (and related derivatives) require both Agent for Linux 3.5.0+ and x360Recover Appliance version 14.0.0.  Appliance 14.0.0 will be released in 2024 Q1
3 Requires appliance version 12.5.0+
4 LVM disk support is limited to single-disk LVM configurations.  Multi-disk LVM pools and RAID configurations are not yet supported.

Special Notes for RedHat Enterprise Linux 9+ (and derivatives) 

Appliance / Vault Linux kernel versions

  • The standard kernel version for Ubuntu 20.04LTS is 5.4.0, which is the same kernel available from the Ubuntu 18.04LTS hardware enablement release provided by the x360recover Bionic installation ISO.
  • The Ubuntu 20.04LTS hardware enablement kernel version is 5.15.0. 
  • Existing appliances and vaults upgrading from Ubuntu Bionic to Focal will have the 5.4.0 Linux kernel version.  
  • Newly deployed appliances installed from ISO will have the Linux 5.15.0 kernel.

Why it matters

For the most part, you need not be concerned with which Linux kernel is deployed on your devices.  Existing devices that were working on x360Recover 12.x with Bionic will continue to work on 14.x with Focal and will, in fact, have the same Linux kernel version after the upgrade.  

Newly deployed devices installed via the installation ISO will have the latest available kernel (5.15.0) for the best hardware support options.

However, please note: Partners wishing to perform backups for RedHat Enterprise Linux 9 (RHEL9) or other systems running Linux kernel 5.14.0 or newer that are using XFS filesystems will be required to upgrade the underlying Linux kernel to 5.15

RHEL9 ships with Linux kernel 5.14.0 or newer, and the 5.14 kernel introduces breaking change into the XFS filesystem.  Systems running a kernel older than 5.14 cannot mount an XFS filesystem that was created under 5.14 or newer.  In this case, Backup Complete Checks and File recovery for the Linux protected system cannot be performed on an appliance or vault using the 5.4 kernel, since the backup data from RHEL9 systems cannot be mounted.

To install the Hardware Enablement Kernel on an appliance after upgrading to release 14.0.0, login to the device as root via the console, IPMI, or ssh session and run the following:

apt install linux-generic-hwe-20.04

For assistance upgrading the kernel on an Axcient hosted vault, please open a support ticket.

x360Recover protected data size limitations

Storage of protected system data in the Axcient cloud is intended to fit common use cases of MSPs and their customers.  We have tailored our recovery SLAs and Cloud Fair Usage policies to ensure that the vast majority of MSPs core use-cases for data protection are covered.  That said, there are limitations to our bundled cloud storage and specific protected system size limits.

The Axcient Fair Use policy spells out the terms of overall cloud storage limits based on the number and type of protected systems you have protected in the Axcient Cloud.   Fair Use is intended to provide a reasonable storage pool capacity which most partners will find provides virtually unlimited cloud storage for their per-endpoint protected systems (based on the expected nominal average size of typical server and workstation endpoints) while providing Axcient with a means of remediation in the event of abuse by a partner.

See:  Axcient’s Fair Use Policy for details.

100TB Protected System Limit

In addition to Fair Use limitations to the total storage pool usage, there also exists a practical size limitation for a single protected system endpoint.  Axcient does not support storage of any protected system in the Axcient cloud where the total data consumption for the system exceeds 100TB.  This 100TB size includes not just the in-use size of the protected system, but also the total aggregate of data consumed by the protected system backup retention.

Important: Backups and replication for protected systems exceeding 100TB may be halted to ensure proper operation of the Axcient cloud.

Partners that need to provide backups for protected systems larger than 100TB may do so using Private Cloud vaults hosted in your own datacenter.


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