What, may I ask, is this infatuation with RAID? Is everyone trying to re-enact the Life and Times of Sisyphus or it part of being a member in some kind of club for the masochist?
And please don't tell me it's "just in case one of the hard drives fails so we will have backup". That will be my much needed laugh for the day as a reason.
Oh and RAID0 doesn't back anything up. It's like having a std conventional HDD without the ability to backup your data. If my RAID were to go down I would have to figure out which HDD is bad replace it and start over.
But if I were to use a HDD with the same capacity as my RAID, I could store the information as +1 and then my data would be backed up. Not sure if just plugging it in would induce the RAID to autosave to the new HDD, but I wouldn't care because I could do it myself if I had to.