After burning an .iso to a dvd, is there any "free space" left on the dvd, where malware could hide that was already on the dvd BEFORE the burn?
Assuming that the .iso is smaller than the #GB for the dvd-r or dvd+r (only, no rw).
Brasero "finalized" the disc and I "am guessing" wrote the OS to the entire disk, but this I am not sure of.
Since the size of the .iso is smaller than the size of the dvd, couldn't there be free space that the .iso / OS is not covering?
Please note: this question is not about adding anything AFTER the burn, rather, before and during the burn.
As a sidenote: can a dvd+r be partitioned "before" the burn?
UPDATE: I do not want to add anything after the burn. I am trying to determine if I put a blank, never used dvd-r into an infected computer and then burn a clean iso, and the checksum for the dvd comes back good, could there be malware in the "free space". So maybe the iso would burn to the parts of the dvd-r that didn't have the malware and the malware is left in the free space.
I don't want to take a dvd that I just burned an iso to, with all good checksums, and then put it in a new computer whereby it might spread the malware, if present, to the new computer, thereby infecting the new computer.