Jerome Fine replies: Will you be keeping all the PDP-11 systems? While I may need a divorce if I bring in any more, some might just entice me. I am in Toronto and would consider local pickup. I just received 2 PRO350 systems and I would like to set up a hard drive, but I can't seem to either set the jumpers correctly on an RD51 or it needs a FORMAT command which produces an error. The system will boot RT-11 from the RX50 floppy and I can do a: "DUMP/TERM DW0:" on an RD51 which has DS1,DS2,DS3 all IN the circuit for an RD51 which has P/OS on the drive and I don't want to loose that drive with P/OS just in case I am curious in the future. When I configure the "DIP" pack (the black plastic with pins that are cut to set up the DS settings and the other jumpers - the one beside the terminating resistors) on a spare RD51 that I have, I can neither do the DUMP nor do a FORMAT - which I thought that a PRO350 was allowed to do. The DW0: drive is installed and loaded, I just get an "Input error" message for the DUMP and a different error for the FORMAT - I think it was something like "Bad device". I should have marked it down. Incidentally, the RD51 drive light never goes off on the PRO350. Is that correct? Any suggestions? Sincerely yours, Jerome Fine