DEC Pro380 disk drives

[Allison]

>
>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:
>> 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

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