Edited a previous post with the case ID.
Yes, I've had a storage array fail on me - flipped the proverbial switch, powered up a bunch of crash consistent VMs at my colo and very nonchalantly informed my users that in spite of a critical hardware failure, we'd be back up in about 30 minutes with a minimum of data loss. Turns out it only took about 20 minutes
Having a disaster recovery plan is good peace of mind. Actually needing it, and having it work the way it was supposed to... well that's just priceless. A good way to remain employed, if nothing else! Hahah.