I accidentally bumped the usb cable and disconnected an external hard drive while it was being formatted. I have not been able to format or initialize it since. It does not show up in disk utility. However it does show up in the system profiler. I've also tried initializing with Windows through VMWare Fusion and boot camp. No luck there either. I had an "Incorrect Function" error when in the Disk Management utility. How can I format this drive?