If you're using a Debian based distro, you can search through contents of packages to see if there's a conflict:

E.g. apt-file search /usr/bin/sh

You could read the docs.

What you're trying to use is "hardware" RAID. Using hardware RAID is generally a bad idea. If you're using Linux, use software RAID instead.

Also consider using Btrfs, it will make having a RAID setup even easier.