Path: utzoo!attcan!uunet!zephyr.ens.tek.com!uw-beaver!mit-eddie!mintaka!think!yale!cmcl2!lanl!dls
From: dls@lanl.gov (Dale L Schrage)
Newsgroups: comp.sys.dec
Subject: MicroVAX 3100 - Model 10
Message-ID: <43218@lanl.gov>
Date: 8 Feb 90 20:43:47 GMT
Organization: Los Alamos National Laboratory
Lines: 26

Does anyone out there have any experience using a micro-VAX 3100
Model 10 with UNIGRAPHICS (or some other) CAD????????????

At the present time we have the following system:

		micro-VAX-II
		16 Mbyte memory
		RD54 system disk
	    (2) RD53 user disks

We run four MEGATEK D135 workstations. The MEGATEK's ahve graphics
processors, 1 MByte of memory, and will do 400K vectors/second.
All of our CAD work is currently done in 3-D wireframe and
we will shortly commence extensive use of the solid modeler.
The micro-VAX-II is both CPU-bound and disk I/O bound.
Our local DEC sales rep has suggested a Micro-VAXX 3100 Model 10
(not a VAXSTATION 3100) with 20 Mbytes of memory plus a 
600 Mbyte disk. This disk is an RZ55 (24 msec acces & 1.5 Mbytes/sec
transfer rate; the existing RD's are 38 msec access and 625 KBytes/sec
transsfer rate). The 3100 utilizes SCSI, not Q-bus, so there
are limited options for peripherals. 
The 3100 is rated at 3.9 VUPS verses 0.9 VUPS for the Micro-VAX-II.
It looks like I might improve both the CPU-bound as well
as the I/O bound situation but neither by very much.

Any experience or advice out there??????????????????????