I'm trying to restore a working installation using a ddfull backup made with the backup plugin. I'm restoring it to a different usb drive that's the exact model and size. The restoration works but when I try to boot from it grub fails, gives me "error: invalid arch-independent ELF magic" and shows the grub rescue prompt. Do I need to do something else besides restoring the ddfull image with dd in order to make this work? This is the command I used: `sudo dd if=/path/to/backup-omv-2024-01-07_03-00-01.ddfull of=/dev/sdb bs=4M status=progress` the drive shows all the partitions and everything seems fine. I did not do anything else besides restoring it using the dd command though, do I still need to use one of the other files created by the backup plugin?

Nvm, tried restoring the image again and now omv booted successfully however for some reason the docker service doesn't want to start. Trying to restart it fails too.

Quote from macom

Please post the output of systemctl start docker

Thanks but I changed the backup to fsarchiver and followed this guide and it worked, docker and everything right away. fsarchiver takes up way less space too and it's probably gonna make it easier for me to do what I want to do: move omv to a different, more compact usb drive.

Quote from chente

You have another option that may interest you. omv-regen.

Thread

[How to] Migrate/Restore OMV Settings to Another System with omv-regen

UTILITY TO MIGRATE OMV CONFIGURATION TO ANOTHER SYSTEM OR
DO A NEW OMV INSTALLATION AND KEEP THE SETTINGS

omv-regen

Copy and paste the following line into a terminal and run it as root or with sudo.
wget -O - https://raw.githubusercontent.com/xhente/omv-regen/master/omv-regen.sh | bash

• STEP 1. Create a backup of the original system with omv-regen.
• STEP 2. Do a fresh installation of OMV on the disk you want and connect the original data drives.
• STEP 3. Use omv-regen to migrate the settings from the

…

chente

Apr 29th 2023

It's a great option to have in the arsenal but I have omv running in a headless system right now and wanted to avoid re-installation.