More on DEC Pro 380

From: Dave McGuire <>
Date: Wed Jul 28 14:09:00 1999

On Wed, 28 Jul 1999, wrote:
>> The RD31 was a Seagate ST225, and the RD32 was an ST251...The ST251 did
>> something like 40ms avg. access, and the ST251-1 was 28ms...The best upgrade I
>> ever did in one of my pdp11/73s running RSTS/E was replace the ST251 with an
>> ST251-1. :-)
>Quantum D540 is the RD52, 31mb and faster than either of the seagates.
>Also the 251 has a lousy track record for reliability (heat and skimpy spindle

  The Q540 was spec'd at, I believe, 35ms...but the ST251-1 (not 251) was 28ms.
I do agree about the heat and spindle bearing issues, though, 100%. I have
*never* seen a '540 fail. And they made much cooler sounds. :-)

>> Also, on the subject of RT11...Does anyone know if Mentec has any sort of
>> "hobbyist" class license for the PDP11 OSs, or if not, does anyone know what
>> their actual prices are like?
>No on the hobby license yet. No idea on prices.

  Hmm. I think I'll ask them about the prices. By the "yet", are you
suggesting that someone is working on it? :-)

                       -Dave McGuire
Received on Wed Jul 28 1999 - 14:09:00 BST

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