Summary: There is some sort of issue with this mobo's sata controller. If you hotplug a drive, the adjacent sata port quits working while the new drive is brought up. If you use raidz, RAID5 or mirroring, you cannot hotplug and keep the pool up, you have to reboot, which means that you might as well not hotplug it. Since I bought this specifically for the 6 port sata hot plugging. I have to give it a low rating, because it doesn't work correctly.