Can read floppies but not write

[admin]

You may not know the history of that Samsung drive. That could be very worn out mechanically (stepper motor/lead screw). That does happen. I have had to toss drives that were worn. What I could do is make a drive tester routine. Basically, you step the head in one direction up a few tracks and stop and do the write. Then step back down and repeat and do the read. You then do the same thing coming from the opposite direction. You can determine the flux level (deviation) which can tell you how much slop there is in the stepper mechanism. I really need to do that and also do a test for what flux areas can be written (to determine Macintosh compatibility for writing).