I'd be careful of all them external seagate drives, I picked up a bunch of desktop expansion 3tb drives which were just 3tb barracuda drives and they all died at 2.5 years (just outside of warranty) Hard Disk Sentinel showed the drives reported a max temp into the high 80's and low 90's... Which I think had a huge hand in the failure of all the drives Might want to consider improving the ventilation of the externals and possibly adding of fans to the mix Just a thought Impressive setup though!