I am trying to install 12.04.2 LTS to a blank 40G IDE hard-drive that was previously used in a raid array under windows XP. I used GParted to delete the existing partition on the drive leaving the disk blank. The desktop CD could not even see this drive. I then tried partitioning/formatting the disk with an ext4 primary partition. The installer still could not see the drive. I'm guessing that when the drive was used as part of a raid array, some part of the drive has information still present that says it is part of a raid array. If that is what is preventing this drive from visible to the installer, how do I clear everything having to do with its previous raid usage. Note, it will NOT be part of a raid array from now on.