Ron> Ok, I am reading the RSTS/E 7.0 system generation manual.. and I Ron> am looking at my existing simh hard disk files and what may be Ron> available.. I can't seem to find information for RSTS as to what Ron> it calls it's disk drives.. Ron> I have two RL01 images which RSTS calls DL0: and DL1:, and Ron> DSKINT and HARDWR see them also as RL and they seem to have 2MW Ron> of capacity. I can have other kinds of disks, for instance Ron> RMO3 simh=RP RSTS=???? DSKINT/HARDWR=RR Capacity=33mw Ron> Ten times the size but what does RSTS call them? Ron> I would like to find a table/list that shows all the different Ron> disk models and what RSTS calls them. Can anyone point me to Ron> the proper manual? You mean it isn't in the Sysgen manual? Strange. Here goes: RC11 DC RF11 DF RS03/04 DS RK05 DK RK06/07 DM RL01/02 DL RP02/03 DP RM02/03/05/80, RP04/05/06/07 DB and DR MSCP DU MSCP appeared fairly late, V8.0 I think but I don't remember exactly. DB and DR both refer to Massbus moving head disks. Until V9.0, there were somewhat odd rules about mixing them on a single controller; the details should be in the book. Best rule for SIMH or E11 purposes is NOT to mix "RM" and "RP" drives on a single RH11/RH70. If you want both, put them on separate controllers. If you do that, then the RM drives will be called DR, and the RP04... drives will be DB. paul