Ah I understand!  Thanks for the detailed explanation,  I will request for an upgrade of the controller then!
I am tasked with setting up SCCM 2012 R2 SP1 CU2 and SQL Server Standard Edition 2012 W SP1 onto a PowerEdge R720 Server: Dell PowerEdge R720 64 bit SCSI Controller – Dell Perc H310 SCSI Disk Device Windows Server 2012 R2 Standard Processor – Intel Xeon CUP E5-2640 v2 @ 2.00GHz 2.00 GHz (2 processors) 64 GB of Memory 4 1TB drives that are SATA spinning at 7.2K  Anyhow my Disk Drives aren't able to support the IOS needed for SCCM and SQL.  Since this is my only choice of server I would like ideas on how to increase the performance?  Brandi
Options on best way to increase IOS performance on my PowerEdge R720