I have been using 3.5 HD disks in my 3.5 Unidisk drives (3 of them) and have yet to encounter any media failure. I did have one that wouldn't format out of the box, but after 75 or so disks that have been perfect 1 that wouldnt format didnt bother me too much. Jim ----- The Palmtree BBS 310-453-8726 v.32 Inet: jpoore@pro-palmtree.cts.com