Has anyone here either used or using those WD RE4 2TB (x4) or WD RE4-GP 2TB (x4) drives as part of a RAID6 Array? Oppose to my current RAID5 configuration that consists of WD 4 RE3 1Tb (x4) (total 2.79TB). I'm planning to migrate to a more secure RAID level 6 with new drives... So, how are those BIG 2TB RE4's? and which is faster? I'm desperately in need of more data space, my RE3 array is down to it's last 84Gb. Yeah I know it sound like alot but man, since my last project the data demands have grown 340Gb and it's still incomplete. Sooo... I wanna upgrade before I DO run outta space!