You should be able to tell from looking at it. It should be quite obvious. If it has two heads, one on each side, or if it has two head cables that arrive at the logic board, it's two-sided, otherwise ... I've got the OEM and service manuals somewhere, but can't lay hands on 'em right now. I'd guess, from the even number and '-1' that it's probably single-sided, but these are pretty late-model drives, so that may not be applicable. If you don't want to open the box, then you could put in a two-sided diskette. If it doesn't go "ready" then it's single-sided, as it doesn't have the sensor for "seeing" the hole in a two-sided diskette, which is in a different location than the one for single-sided diskettes. You can do this from just the cable, since the cable is driven with OC drivers. If the ready signal goes low at 6 hz, then it sees the indicator. Dick ----- Original Message ----- From: <Innfogra(a)aol.com> To: <classiccmp(a)classiccmp.org> Sent: Thursday, April 18, 2002 10:32 AM Subject: Need Shugart 860-1 info