Hello, I am trying to prevent a USB device from being formatted. The following solution does not work (I'm using XP SP3) - can you tell me why? Once there is an attempt to overwrite sector 0 (root directory), I am not writing anything to memory (the device is mapped to a RAM drive but I don't think it matters here), failing the SCSI "test unit ready" and reporting "device not ready", "medium format failed" in the following request sense. The next time I plug in my device, it is indeed identified but not mapped to a drive. this is a problem in the controller side because rebooting windows does not solve it but rebooting the controller does. What gives?