Yea, that looks like a bug in the menu: it shouldn't take you back to the main menu where you can choose a guided install *again* after having done so already. If you want to set up raid on multiple disks, you need to do a manual install rather than a guided one.
Yea, that looks like a bug in the menu: it shouldn't take you back to the main menu where you can choose a guided install *again* after having done so already. If you want to set up raid on multiple disks, you need to do a manual install rather than a guided one.