Comment # 14 on bug 1017610 from Richard Bos

(In reply to Ladislav Slez�k from comment #13)

Ladislav, thanks for looking into this.

> The repository is either empty or libzypp could not read the data. Could you
> double check the disk content? If add the disk repository in an installed
> system, can you see the packages from it?

# LANG=C sha256sum -c openSUSE-Leap-42.2-DVD-x86_64.iso.sha256 
openSUSE-Leap-42.2-DVD-x86_64.iso: OK

Selected a random package:

openSUSE-Leap-42.2-DVD-x86_64028/suse/x86_64> rpm -qip $( ls | head -431 | tail
-1 )
Name        : g3utils
Version     : 1.1.36
....
The g3utils are included in the mgetty source package.
Distribution: openSUSE Leap 42.2


Medium seems OK to me.  Besides that the problem is reported by more people.
https://bugzilla.suse.com/show_bug.cgi?id=1017610#c10