9 May
2007
9 May
'07
12:56 p.m.
Subject: Re: DEC Pro380 disk drives
From: "Ethan Dicks" <ethan.dicks at gmail.com>
Date: Wed, 09 May 2007 08:44:20 -0400
To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>
On 5/8/07, Allison <ajp166 at bellatlantic.net> wrote:
They looks the same but the handle has a different rev. The real differences
are bug fixes. Essentially the RQDX2 is a bugfixed RQDX1 with later firmware
that is aware of a larger (at that time) assortment of drives. In the real
world of MSPC controllers RQDX3 is most desireable and RQDX1 the least.
FYI: some flavors of RQDX1/2 didn't pass interrupt grant and MUST be the last
card in the chain.
Allison
The RQDX1/2 are the same board and mostly
interchageable depending on
firmware rev. It's a Quad width board.
What are the essential differences between an RQDX1 and RQDX2?
AFAICR, the RQDX1 doesn't pass grant below it so it *must* be the last
board on the bus, but the RQDX2 doesn't have that limitation; and, the
RQDX2, I think, knows about one or two more drives than the RQDX1. a)
is that correct? and b) is that all?
I have at least one RQDX1, several RQDX3, and I don't think I have any
RQDX2, but one never knows what one will stumble across.
-ethan