You mean three drives? You need data integrity, what if a drive fails? What if you have a raid 1 but when readding a new drive you have read errors? Parity is good.
You let the clutch up until the rims start to drop a tiny bit, at this point you can let off the brake and move your foot to the gas. You shouldn’t move backwards as long as you are slow and feel for the engine to not stall
