I have Mountain Lion running in VMWare Fusion on my Snow Leopard Mac. The VMWare virtual disk is on a separate disk from my main bootup disk. Running Blackmagic Disk Speed Test in VMWare, I get amazing speeds, but running it in Snow Leopard with the target disk set to the disk VMWare is using, I get way slower speeds (still good, just way slower). Is VMWare compressing the data?