Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!bloom-beacon!oberon!cit-vax!elroy!gryphon!cadovax!trwrb!trwind!nrcvax!kvc From: kvc@nrcvax.UUCP (Kevin Carosso) Newsgroups: comp.sys.dec Subject: Re: external rd53 in uVax 2000 Message-ID: <1564@nrcvax.UUCP> Date: 24 Sep 88 00:49:13 GMT References: <2123@stpstn.UUCP> <1025@amelia.nas.nasa.gov> Reply-To: kvc@minnie.UUCP (Kevin Carosso) Organization: Network Research Corp. Oxnard, CA Lines: 46 In article <2123@stpstn.UUCP> aad@stpstn.UUCP (Anthony A. Datri) writes: > >I've got an external RD53 here (ie., a box with a power supply and >an overprice disk in it), and I'd like to hang it off a hitherto >diskless Microvax 2000. Do I have to buy one of the "adapter boxes" >from DEC to give me the connector, or can I sneak the cable off >the internal controller out of the box, or should I just rip >the drive out of the external box and jam it into the uv2000? How timely! I spent most of yesterday afternoon ripping our new VAXstation 2000 apart to put the expansion adapter onto it. We've got an RD54 in the system unit and need the expansion to plug in the external TK50. In any case, by far your best bet it to take the RD out of its own box and jam it into the system unit. The 2000 system box is a real miracle of packaging. It's easy to take apart once you figure out how things work. The top, left and right sides, and front panel all form a single cover which (after removing the four screws on the bottom (not the feet!)) slides forward off of the unit. At the top you'll find the single-boad computer, laying face-down with a piece of heavy stock paper covering the now exposed, soldered side of the PC board. Leave the paper on there. The PC board is in a metal frame, mounted to the rest of the chassis with some fairly obvious screws. You can undo those and lift the frame up, disconnect the power cable and that other cable, whatever it is, and remove the whole frame. You're now left with your system unit containing just the power supply and the rail for the disk. Slide the RD53 onto the rail (it's probably mounted the same way in the expansion box anyway). I don't know if the diskless machines come with the ribbon cable that goes from the SBC to the drives, but if not you hopefully have one in the expansion box to use. The SBC (single board computer) should have three ribbon cables connectors over in the corner above the disk drives. One of the long slots is for your disk cable, the other long slot is for the TK50 port in the expansion box and the short slot also goes to the expansion box. I think the TK50 slot is black and the disk slot is blue, but don't quote me on that. There should be an unused power connector for the drive as well. The funny ribbon cable that was inside our system unit had one unused connector about halfway down the cable. I assume that's used when you've got two 1/2-height drives in the system unit. If your cable has such a connector, just leave it disconnected. /Kevin Carosso kvc@nrc.com Network Research Co. kvc@ymir.bitnet kvc@nrcvax.uucp