JonnyTech

Yes, backup of `/dev/md126` is correct. Are you sure that you have not mounted `/dev/md126p3` swap partition before cloning? Or you can simply exclude that partition.

`/dev/sda`, etc, are physical devices. `/dev/md126p1`, etc, are logical (think: virtual) drives/partitions made on top of the physical RAIDed ones. The RAID controller translates between them. When restoring do so...