I had a similar experience doing a clean install with the Experimental ZFS option. This happened repeatably for devices /dev/sda and /dev/sda1, i.e., the installer refused to install to either device and I ended up manually fixing this issue from chroot operations from the livecd.
I had a similar experience doing a clean install with the Experimental ZFS option. This happened repeatably for devices /dev/sda and /dev/sda1, i.e., the installer refused to install to either device and I ended up manually fixing this issue from chroot operations from the livecd.