On Mon, Mar 27, 2017 at 11:45:00AM +0000, kAt wrote: > Yes, all this was done, the image on the stick is fine and functional! > I did not say there was a problem with it, but the rest of the unused > space ob the disk/mem-stick
When you write a disk-image onto a "disk" (in this case, a USB mass storage device), you are overwriting all of the metadata at the start of the "disk", including the partition table. If the disk-image came from a 4 GB disk, and you write it onto an 8 GB disk, then the 8 GB disk will *believe* that it is a 4 GB disk, because it has the metadata from a 4 GB disk. As others have said, this has absolutely nothing to do with the bs= option in dd. All that does is make the dd command run a tiny bit faster or slower.
