Jerome Fine replies: I have attempted on a number of occasions - all without success - to get a CD on a CMD220/TM host adapter on a PDP-11 system under RT-11. I suspect that I am using the wrong CD drive. Does anyone have any suggestions as to model number that would work? I have asked around and there does not seem to be any DEC CD drives available like the RRD42. By the way, when I put a CD (RT-11 Freeware CD) into my CD IDE drive on the PC and MOUNT the CD under E11, I am unable to read the first 64 blocks. I understand this is a function of W95. If I am able to produce a CD of my own from an old ST11200N drive that I have, will that same limitation apply on a real PDP-11 in that I will not be able to read the first 64 blocks of partition zero on the CD media? In addition, if possible, I would prefer to use a more current model than the RRD42 from DEC which requires the caddy for the CD. Since I am able to use E11 on a PC to read a CD these days, there is also a bit of an emphasis on cost. At this point, I have found that it is just as simple to transfer the files to a magneto optical cartridge and use a Sony S501 on the real PDP-11 and the PC as an interchange media. I would like to acquire some additional magneto optical cartridges as well. Does anyone know where I might be able to find some inexpensive magneto optical cartridges for the S501 drives? These must be the media that are 512 bytes per sector. Sincerely yours, Jerome Fine