Subject: Re: (Micro)VAX 4000/200 bootblocks
To: Douglas Meade <inforum@umd5.umd.edu>
From: Marc Schneiders <marc@oldserver.demon.nl>
List: port-vax
Date: 05/08/2000 18:26:30
On Mon, 8 May 2000, Douglas Meade wrote:
> On Mon, 8 May 2000, Marc Schneiders wrote:
>
> > >
> > > What kind of disk controller are you using in this system?
> >
> > You tell me! I'm completely new to all this. Never saw one running
> > before this one I just got :-)) There is a SCSI controller in it,
> > I presume, since there is an Exabyte Tape on a separate
> > controller,
> > which has "DILOG" on it.
> >
> > The disks are all three on a controller with no label (I haven't
> > taken it out though for shear awe). Is the information from dmesg
> > I posted not enough to tell? Disks are RA82. 
> >
> Can you pull one of the disks out of the cage and have a look 
> at it for us?  Many of the ESDI disk controllers and SCSI controllers
> will make the disks appear to MSCP as "ra82" or something of that
> family.
> 

I am sure I can get it out, but will I get it in again? Maybe taking
it apart completely isn't necessary.
 
> If the controller doesn't have a DEC "M-" number, it could be 
> a third party ESDI or SCSI controller.
> 

There are two controllers (at least): One has DILOG on the blue 
plastic thing with which you can take it out. This is similar to the
brown plastic handle on DEC cards (like the M7555, which I just
learned is the RQDX3 controller).
This is a SCSI controller with 50 pins connector. I took it out. It
has a NCR 53C90A on it. This only has an Exabye tape connected to
it. Machine will not get through NetBSD boot without it. Hangs at 

uba0 at ibus0: Q 22.

Do I have to tell the machine in the boot monitor that it isn't
there?

The hard disks look like ESDI to me with their usual two connectors.
The controller (number 2) which they connect to is not DEC. It says
DILOG as well on the card. I haven't taken this out yet.

The funny thing is that there is another card that seems to be a disk
controller (number 3). This has no name on it (as far as I can see),
but it does have the brown plastic handles. It connects to the M7555.
In fact it is the only thing connected to the M7555. The card itself
is connected with a cable ("Spitfire-Strip") that goes inside
somewhere and that connects probably to the floppy drives. Thus:

M7555 --- Unknown controller --- Floppy drives

I suppose this is "uba0 at ibus0: Q 22". There are 4 unused connectors
on it. Would it be that the (or some) harddisks can also be connected
to this??? 

--
Marc Schneiders --- marc@venster.nl --- marc@vrijdom.com

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