The non-ddfull options do not backup a large enough chunk for uefi or the RPi
Is there any way to backup missing chunks for UEFI manually? I'm using an x86 motherboard, not a RPi.
I assume you are using a large OS disk and putting data on it and that is why you don't want to use dd full?
Yes, my SSD is 240GB, so ddfull occupies around 190GB and takes a lot of time to finish the job. Since there is no possibility for incremental backup in this case, it will require a lot of storage to keep these images. I don't know if I really need daily backups, but even performing backups on a weekly basis will end my free space very quickly.
Images created by Clonezilla or fsarchiver are relatively small ~4GB since they contain only actual data. The disadvantage of Clonezilla is obvious since it allows only manual backups with the server restarted into the Clonezilla kernel. As I said earlier I managed to restore fsarchiver image only on a freshly installed OMV. Please note, that all tests were done on a VM on my working machine, I didn't want to interrupt my main server. Of course it started with a lot of errors, but still I could track all my dockers with some of them running correctly (the ones which don't require other disks).