I recently purchased a Tyan GT20 B5375 barebones server (see link below) to run as an ESXi server. I have outfitted it with two Quad Xeons and 16GB of RAM. At the moment, it appears that disk througput is the biggest bottleneck. I notice a considerable slow down when doing large backups or clones. It has two SATA 300 drives. Is there a RAID controller or other piece of hardware that I could purchase to increase disk performance? Also needs to be compatible with VMWare ESXi. Thanks in advance for the help.