That's was just a *live image* that was required, The equivalent of the present CD/DVD's ISO was then *debian-live-9.7.0-amd64-gnome.iso*.
- bug#34487: dd (coreutils) 8.30 – A written ISO image cannot n... Ricky Tigg
- bug#34487: dd (coreutils) 8.30 – A written ISO image can... Assaf Gordon
- bug#34487: Ricky Tigg