[pups] Disk query on Ultrix 3.1

[Fred N. van Kempen]

Kevin,

> I am using an 11/83 with an Emulex UC07 Qbus-SCSI card.  At present I have
a
> Seagate ST4767N disk attached.  The emulex card emulating an MSCP drive I
> believe.
Nice, I have one too (an UC08, which is just a dual-port version of the '7).

> I am sure I could also find a higher capacity drive without 
> too much effort.
Yup.. come to Holland, attend one of the 6-weekly "dump" shows, and find
yourself
loaded with 1 and 2GB drives for a couple of bucks...

> 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... 

> I could physically attach a drive with a much higher capacity 
> than DEC ever envisaged, but which drive do I 'pretend' I am using.
I have a kernel with "RA99" compiled in.  That is a test for my experimental
support for Ultrix-32-like "partition tables" (/etc/chpt et al).  Works OK
so far...

Anyway.  Uhm, your drive most probably should work fine when referred to as
an RA81 on an RQDX or similar.. UDA50 comes to mind.

Cheers,
	Fred


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