I just got done jumping through all kinds of hoops to get an OWC QX2 working decent using eSata on my 5,1 with 4 x 8TB enterprise drives and it is absolute junk. It would not at all mount in JBOD, any time I remount RAID 5 shows a corrupted disk in slot B even after I move the drive to another slot were it is fine and even go as far as to format and verify it on it's own via a Voyager. And the transfer rates are downright horrible, 80Mbs write 120 Mbs read on freaking RAID-5! Luckily I have not put data on it and have just done tests. I have the same 4 8TB enterprise drives in my Mac Pro in RAID-5 via Softraid and they are more like 380Ms write / 430Mbs read. My eSATA PCie card is fine too, great speeds on USB3 and eSATA with other drives. Can someone suggest a good 4 drive enclosure that could do RAID-5, hardware or via Softraid via eSATA? With all the bad reviews on B&H I saw ( nothing but glowing on OWC ) I really just want to get rid of this thing before it completely destroys $1,500 worth of enterprise drives.