I remember when I first got was introduced to IBM’s FlashCopy backup technology roughly 8 years ago.  An IBM i engineer who started to embrace external storage for small to mid-sized IBM i shops said to me one day, “If we went with SAN storage, we could flash out a full backup of their whole LPAR in less than 15 seconds”.  To which I responded, “Say what?! That doesn’t sound possible! It sounds like some Houdini magic or something”. Being the guy that needs to know how everything works, I…