I have an Areca 1231 ML w/ 9 Hitachi 2TB drives and 1 is a hot spare. All a single RAID 6 array. Now, if a drive dies does the hot spare get automagically added to the RAID set then the volume set? Adding to a RAID set take 24 hours. Can I add it to the RAID set and leave it as a hot spare for the volume set to reduce the time to recreate the RAID volume set?