Looks like external drive may have died, make a of nose when seeking head. Got out of DM2 and put extB cart with Advanced Diagnostics in Dsk 1 trying to test out why I can't format to disk 2. Rpm speed 290.5 to 300.2, That seems a good normal. Testing with same floppy the other drive preformated. Already tride the other to disks in DM2. Testing further.....No luck. This is a Texas Instrument 5 1/4 drive model No. PHP1850C. It seems the read/write arm is having trouble seeking and making a vibration noise that seems loud. By the above number is there a reference to see what style or format that drive is, only because I used that drive to back up my personal library not the SS/SD floppy in the expBox.