On Thu, Mar 2, 2017 at 8:36 PM, Robert Moskowitz <rgm at htt-consult.com> wrote: > dd if=/dev/sdb of=os.img bs=1M count=3210 > I would recommend bs=512 to keep the block sizes the same though not a huge diff just seems to be happier for some reason and add status=progress if you would like to monitor how it is doing. Seems the command you have should work otherwise.