Very nice. A good amount of space and performance considering what you paid for them.
Originally Posted by Jstn7477
I wonder how fast the array would run on an Intel controller or a dedicated enterprise level card. If I remember correctly, a RAID 5 build I did with an Areca 1210 and 4x 500GB WD Blacks did around 340 max/180 min MB/s. Looks like your setup pretty much doubled those.
On PCH, I'd guess another ~100MB/s.