It's T10. You'll also need a 5/64" allen wrench and a phillips screwdriver. My 8300 SD had a Western Digital WD800 (80GB) EIDE drive. The file system was not recognized by Windows XP. We need somone to write a driver for the file system. Anybody? Windows does see the drive, it just doesn't show up with a drive letter because the file system is unrecgonizable. In Windows XP, you can see unassigned drives by going to: Start|Programs|Administrative Tools|Computer...