Hard to say. I was using DSS Lite on another maschine, same board and NICs but older processor and less RAM. I did not configure much and I'm not sure if I created a RAID. I just had this DSS Lite to find out best settings inside the tuning options. Can RAID be the problem? With the iSCSI R3 Enterprise I use software RAID 5 on 4 harddisks, left-symmetric, 64k chunk size.