I've never done a RAID on OS X before so I apologize if these seem like noob questions. Mostly, my question hinges on whether I can add/upgrade an array at a later date via Disk Utility. For example, if I have 1 drive and add a second like-size drive at a later date, can I upgrade to a RAID 0 or RAID 1 configuration? I presume yes. The other way around, if I have a RAID 1 array working, can I break the mirror and replace a drive and restore the array without data loss? When installing OS X to a fresh machine, can you/do you setup the RAID from the configuration CD/Disk Utility pre-install?