On Mon, Apr 16, 2018 at 11:01 AM, Elio Fabri <[log in to unmask]> wrote:
> On 04/16/2018 04:55 PM, Nico Kadel-Garcia wrote:
>>
>> Did you copy directly to the first block of the USB device? For
>> example, for a device reported at /dev/sda:
>>
>> dd if=dvdfile.iso of=/dev/sda
>
> I don't remember.
> Maybe I copied into /dev/sda1
>
> Does it make some difference?

Yes. /dev/sda1 is a partition, not the beginning of the disk. Finding
a boot loader on a partition is.... sometimes workable, but it's iffy
at best.