Here is my situation: All the files needed to run usb loaders are in one sd:\apps. Two USB disks with same games but different partition sizes. Use one USB disk for a while and then connect the other without changing the config files on the sd:\apps. Would that be the cause for freezing some games with the second USB drive? What are the tools available for testing the health of a USB disk? I have Mac OSX, Ubuntu and XP. I remember somewhere PPsainity mentioning stress test, but I could not find that post. I did find a utility that he recommends for something else.