From ba3e8d77b43d18565355d296bf3ddde6956a8357 Mon Sep 17 00:00:00 2001
From: Andrea Mazzoleni
-[4] - unRAID completely rebuilds parity when adding a new disk that already contains data, and during this process the existing data in the array is not protected. +[4] - unRAID completely rebuilds parity when adding a new disk that already contains data, and during this process the existing data in the array is not protected. This is a serious flaw, as a full parity rebuild puts considerable stress on all drives. If any disk is near failure, there’s a high risk it could fail during this operation. The only safe way to add a new data disk is to pre-clear it first.