Add virtual disk to virtual server as SCSI on Hyper-V

I am running Hyper-V on a Server 2008 R2. The hardware is a Dell PowerEdge R710 and PowerVault MD1200. The OS is running an a RAID 1 array. There is a 2+Tb RAID 5 array for the virtual drive(s). I have also just created another 1.6Tb RAID 5 array that I would like to use for a virtual drive as well. I am running (1) virtual server on this configuration. The VM is currently using (3) virtual disks in addition to a CD/DVD.
Here's the issue. In Hyper-V Manager, it shows I am using all available IDE ports: Controller 1 has (2) hard drives, and Controller 2 has (1) hard drive and (1) DVD. How do I add another virtual disk? I do show a SCSI controller in the hardware list for the VM. Can I create the disk here? Should I move the DVD to the SCSI controller and add the new disk to the IDE controller? I do not anticipate adding any more drives to this system. What would be the best practice?
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Svet PaperovConnect With a Mentor IT ManagerCommented:
Yes, you can create your new virtual disks as SCSI. In matter of fact, there is no difference in the performance of IDE and SCSI virtual disks. The only limitation is that the bootable volume C: cannot be on SCSI interface. You don’t need to move the DVD to SCSI.
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