[pups] Disk query on Ultrix 3.1

[Johnny Billquist]

On Fri, 23 Mar 2001, Fred N. van Kempen wrote:

> Kevin,
> 
> > Which disk should I tell the Ultrix installation I have to get the best
> from
> > my setup.  I made an 'educated' guess of RA81 for the moment, and that
> > works.
> Ultrix will think it is an RA81, most likely.  The controller will be seen
> as
> either an RQDX3 (MFM QBUS) or an UDA50 (MFM Unibus).  Never tried that, 'cos
> the
> controller is still on my "todo shelf".  Drives attached to either will
> report
> as RAxx'es... 

Actually, the UDA-50 isn't MFM, it's SDI. The QBUS equivalent is the
KDA-50.

There is no MFM controller for Unibus. That is, no equivalent of the RQDXn
exists for Unibus.

Disks on the RQDXn reports as RDxx or RXxx, while disks on the [KU]DA-50
reports as RAxx (from a hardware point of view). They're both MSCP
controllers though.

	Johnny

Johnny Billquist                  || "I'm on a bus
                                  ||  on a psychedelic trip
email: bqt at update.uu.se           ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol


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