When you mean the device you tried to install from, I have no idea what “impression” is. You should see that you copy the ISO file byte for byte (without any change) to the device (not a partition). The best way to convince yourself and others you did correct is using dd. Example (as root):
dd if=<the path to the ISO file> of=/dev/sdX ibs=4096 status=progress
(where you have to fill in the correct path to the ISO file and the correct letter instead of X for the mass-storage device).
There may be other tools that can do the same, but then you have to be certain to choose the correct options to achieve it to do what dd does.
