VAX/VMS V5.5-2 Memory Requirements

From: ajp166 <ajp166_at_bellatlantic.net>
Date: Thu Aug 31 18:09:07 2000

-----Original Message-----
From: healyzh_at_aracnet.com <healyzh_at_aracnet.com>
To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
Date: Wednesday, August 30, 2000 11:52 PM
Subject: Re: VAX/VMS V5.5-2 Memory Requirements



>Well, since part of the trick is keeping this as original as possible,
I'm
>pretty much torn on what to do about drives. I've got three choices.
>
>The system came with a RQDX3 and RD53, as the RD53 is dead I could add a
>RD54. Or I could go with a WQESD and either a 150MB or 380MB ESDI
drive.
>Or a Viking SCSI controller and a RZ25 (with probably a RZ23L for swap).
Of
>the three I think I like the RD54 and the SCSI solutions best. The SCSI
has
>the advantage of being able to do away with the TK50 for loading the
system.


RQDX isn't slow just that MFM drives runs at the same data rate as
eithernet
which is not fast.

SCSI if you have it is faster, ESDI then MFM. Two RQDX3s running two
drives is MUCH faster than one RQDX3 running two spindles(err drives).
Expereince has proven that.

>Also as I understand it moving off of the RQDX3 is the single best thing
I
>can do to improve system performance. I gather the RQDX3 is only about


True.

>Oh, the trying to keep it as original as possible means I'm being
foolish
>and limiting myself to the BA23 with the crippled 5-slot backplane,
instead
>of replacing the backplane with the 8-slot spare I've got. I've never
>claimed this is a rational project :^) so I'll probably go the
RQDX3/RD54
>route at least to start.


Suit yourself. I have a std BA23 and a 123 and if I had a choice I'd run
two ba123s for perfomance and cooling reasons.

>Who knows when I get bored I may pull the VAXstation II/GPX carcass out
of
>storage and see just how far I can soup it up compared to the
>VAXstation II/RC :^)


Start with two RQDX3s rather than one or better yet CMD scsi.
Pack it with ram 16mb for MVII.

Allison
Received on Thu Aug 31 2000 - 18:09:07 BST