On Wed, 2017-02-22 at 09:18 +0100, Lucio Crusca wrote: > I booted a live Ubuntu from CD media, checked with fdisk that every > partition is starting 4K aligned and used the following command to > copy the disk contents: > > dd if=/dev/sda of=/dev/sdb status=progress bs=4K
Did you unmount all partitions on /dev/sda and /dev/sdb first? Ubuntu live CDs have a habit of mounting every partition it sees at startup which will result in a corrupt disk copy. The above method is how I clone disks, but I do verify the copy immediately after with something like: cmp -n <byte-size-output-by-dd-command> /dev/sba /dev/sdb -- Tixy
