From ard@siva.bris.ac.uk Mon Aug 8 11:25:01 PDT 1994 Article: 2709 of vmsnet.pdp-11 Newsgroups: vmsnet.pdp-11,alt.sys.pdp11,comp.sys.dec Path: nntp-server.caltech.edu!news.cerf.net!mvb.saic.com!MathWorks.Com!yeshua.marcam.com!charnel.ecst.csuchico.edu!nic-nac.CSU.net!usc!howland.reston.ans.net!swrinde!pipex!lyra.csx.cam.ac.uk!warwick!bsmail!siva.bris.ac.uk!ard From: ard@siva.bris.ac.uk (PDP11 Hacker .....) Subject: Re: Fujitsu M2311K/M2312K Drives for Micro PDP-11/73 Message-ID: <8AUG199418224454@siva.bris.ac.uk> News-Software: VAX/VMS VNEWS 1.41 Sender: usenet@info.bris.ac.uk (Usenet news owner) Nntp-Posting-Host: siva.bris.ac.uk Organization: University of Bristol Physics Department References: <3240urINNoue@umbc8.umbc.edu> Date: Mon, 8 Aug 1994 17:22:00 GMT Lines: 63 Xref: nntp-server.caltech.edu vmsnet.pdp-11:2709 alt.sys.pdp11:213 comp.sys.dec:25938 In article <3240urINNoue@umbc8.umbc.edu>, rdavis4@umbc.edu (davis robert) writes... >Having just acquired a micro PDP-11/73, I've got a few questions about Well done. Mind you, the 11/73 is not one of my favourite boxes - I am a hardware hacker, and the single-chip-hybrid CPU is not a nice thing to attempt to repair. Give me a 11/70 :-) >the hard drives that came with it. Specifically, can anyone tell me >what their capacity is and what device numbers (RK somethings?) that >DEC has assigned to them? These drives were made by Fujitsu and are DEC, as far as I know, never supplied Fujitsu drives. So, they're on a third-part controller. It's probably SMD (look at the cables going to the drives - SMD is one wide 64 way ribbon linking all the drives to the controller and a separate 26 way ribbon from each drive back to the controller). 3rd party SMD cards could emulate almost any standard DEC device (I mean that given a DEC device, there was probably a SMD controller that emulated it). Many allowed several logical drives/physical unit. The ones I have come across are : RP02/RP03 RK06/RK07 - probably what you have MSCP device (DU) The last is loved by managers, since it's almost self configuring, but disliked by myself since low-level docs are impossible to obtain. I'm guessing that you have a RK06 emulating controller (I have such a card made by Emulex in my 11/44). The capacities of DEC RK** devices are RK01 -- dunno, but it did exist I think. I have some maintenance docs for it. RK02 -- 1.2Mbytes (diablo model 30 low density) RK03 -- 2.5Mbytes (diablo model 30 high density) RK04 -- 1.2Mbytes (did this ever exist?) RK05/RK05 j (2.5Mbytes) RK05f -- 5Mbytes, fixed platter, looked like 2 RK05's at the interface level RK06 -- 13 Mbytes RK07 -- 27 Mbytes >either M2311K or M2312K drives (I'll have to look them over better to >find out exactly which); I'm guessing that they have 8" platters. > >Also, are these drives extremely fragile? I was careful moving them, >but didn't notice the little head-locking switches on their undersides >until after I got them home. :-( I'm a bit touchy on this, but then I keep PCBs in anti-static conditions, won't put the down on a plastic table top, etc. Try the drives. They're probably fine! > >Thaks very much for any information that anyone can provide about >these drives! > >-- >R.D. Davis | -tony Bristol University takes no responsibility for the views expressed in this posting. They are the personal views of the user concerned.