Question I have a X9DRL-iF motherboard, and moved my Perc 5/i Integrated Raid controller over from another ESXi 5.1 server. Whenever, I do a large copy operation to a single disk attached to the Perc 5/i controller, near the end of the copy during the cleanup phase, the volume dismounts. I upgraded the Perc 5/i controller to the latest A09 bios but the problem persists. I have not had this problem when the Perc 5/i raid controller was installed on my non-Supermicro ESXi 5.1 system. Do you have any other suggestions? Answer To enable the Perc 5/i RAID controller to work with the Supermicro X9DRL-iF motherboard with ESX 5.1 installed, you need to disable the Intel VT-d in BIOS setup. Perc 5/i is incompatible the Intel i/o passthrough extension. Also, please note that the Perc 5/i RAID controller is not officially supported, we do not test for compatibility with this product. Was this FAQ helpful? YES      NO Enter Comments Below: Note: Your comments/feedback should be limited to this FAQ only. For technical support, please send an email to support@supermicro.com.  Enter your email address below if you'd like technical support staff to reply:  Please type the Captcha (no space) R V A M FAQ Stats FAQ ID Related Category / Keyword Date Posted Code 15734 Feature: - Intel Virtualization Technology (Intel VT) Operating Systems: - Other Operating Systems 03/04/13     Print Answer