As far as I know, RedHat 8.0 for s390 and s390x does not exist and in fact, in the matrix at http://www.redhat.com/download/mirror.html all links for s390 do not work because the URLs point to a non-existing 8.0 version.
If you replace the 8.0 part in the URL with 7.2 (or 7.1?) things might work. I sent a comment about the wrong s390 links to [EMAIL PROTECTED] but did not receive a reply so far. Kind regards, Christoph
