You don't setup a raid by choosing to install to one disk, then backing up and choosing the other. Can you post a screen shot of this hang, and attach /var/log/syslog and /var/log/partman after it happens?
You don't setup a raid by choosing to install to one disk, then backing up and choosing the other. Can you post a screen shot of this hang, and attach /var/log/syslog and /var/log/partman after it happens?