USB Bare Metal Restore (BMR): Getting Started



This article describes the USB BMR process for disaster recovery. The Bare Metal Restore utility is a tool to restore downed servers.

For best results, review the Datto Disaster Recovery Guide before you get started.

The Bare Metal Restore feature is not intended to be used as a deployment tool. To deploy a new server instead of recovering a downed one, install the new server's operating system, and then use the Direct Restore Utility to migrate its data.

The Datto Utilities version of USB Bare Metal Restore is only available for Datto appliances running the Datto IRIS 3 (Ubuntu 16.04) OS. For Datto IRIS 2 (Ubuntu 12.04) appliances, or if you are attempting to recover a 32-bit system, image the USB drive with the Legacy BMR ISO environment, and follow the Legacy Bare Metal Restore process. You can see which version of Ubuntu your Datto device is running on the Advanced Device Status page.
If you are performing a BMR from a VM on a Datto appliance, make sure that all volumes have been backed up successfully, and are restored to the production machine, before you remove the VM from the Datto appliance. Otherwise, you can lose data.
A Bare Metal Restore will cause the target server to perform a full backup when the restore finishes. Depending on the speed of your network, you might need to order a RoundTrip to move this backup to the Datto Cloud.


Requirements for the target hardware:

  • Must be able to boot from USB
  • Must be on the same network as the Datto device
  • Must be 64-bit hardware
  • Bare Metal Restore to EFI Linux agents is not supported. See the Installing the Datto Linux Agent article for more information.
  • If you update a protected machine to Mac OS X to version 10.12.5 from an earlier version, you may need to force a new full backup of the agent for continued compatibility with the Bare Metal Restore process.
Any OSs will be restored as a single partition.
Support of RAID hardware is dependent on compatibility with the Bare Metal Restore environment's kernel and version. See Ubuntu's list of certified compatible hardware for compatibility guidelines.
Bare Metal Restore does not support software RAID or FakeRAID (also known as 'HostRAID' or 'BiosRAID').

Networking requirements:

Figure 1 illustrates the data flow for the Bare Metal Restore solution. See the SIRIS, Alto & DNAS Networking And Bandwidth Requirements article for more information.

Figure 1: Bare Metal Restore data flow (click for larger image)

You should have the following items available when starting this process:

  • USB stick that is at least 8 GB
  • We will automatically detect storage controllers and inject them as needed. You may still want to collect any other drivers to apply after the imaging is complete.
  • If your backups are encrypted, then you will need the encryption passphrase for the protected system that you are restoring.

Image the USB Drive

  1. Download the Datto Utilities Image, and image the USB stick. For more information about this process, see Imaging a USB Drive with Datto Utilities.
  2. Once the imaging process completes successfully, unplug the USB stick, and proceed to the article USB Bare Metal Restore: Booting the target machine from USB.

Was this article helpful?

2 out of 2 found this helpful

You must sign in before voting on this article.

Calling all Partners! We want to hear your feedback! Please participate in this quick survey and help us build a better, more-relevant Knowledge Base!

Want to talk about it? Head on over to our Community Forum!