I bought a couple of Rackables refurb servers from EBay and I am having some hard drive instability. I am running VMWare ESXi version 4.0 U1 on both servers. The servers have 3ware 9550 controllers (which I understand are SATA 2) but there is a sticker on the front of each server that says SATA 1 backplane. The servers have WD 7200 RPM SATA 2 drives. Could my drive instability be related to the controllers and the drives trying to talk at a speed that the backplane can't handle? Does anyone have experience with this configuration?