So my first test of RHEL7b1 was "interesting" in a sense that anaconda died on me with a "dracut Warning: /dev/root does not exist" message.

Instead of using the DVD.iso to setup a VM, I just added the rhel7b1 tree on my home nfs server and I quickly copied/pasted some lines in my pxe default.cfg boot menu (and just changed the path to kernel/initrd.img). So, I had a quick look at the documention (and also at the isolinux/isolinux.cfg file on the DVD) and I noticed several things :

- anaconda "usual" options are now inst.${previous_feature} (so inst.repo when it was just repo for previous RHEL releases) -> time to read the doc 

- some previous options aren't supported anymore : for example I used (in the past) the kssendmac feature, and I forgot to remove it from pxe default.cfg line , and that was the parameter that made anaconda dying on me. (for example https://bugzilla.redhat.com/show_bug.cgi?id=987657 and https://bugzilla.redhat.com/show_bug.cgi?id=844478 )

Removing that kssendmac boot option was the way to go, now time to write my first EL7 kickstart files to be ready for QA when it will be built 🙂