Installation process from bootnet.img does not see HD's attached to AHA29160, as opposed to boot.img or bootnet.img for Redhat 6.2 where no such problems occur. Bootnet.img for 7.0 was obtained from sunsite.ualberta.ca/pub/Mirror/Linux/redhat/redhat-7.0/i386/en
you need to combine drivers.img with bootnet.img in order to see adaptec cards.