SUMMARY ^ 2: Does the E-250 use interleaved memory?

From: David Markowitz <david.markowitz_at_sspsolutions.com>
Date: Thu Feb 07 2002 - 14:12:21 EST
As often happens, my last summary garnered more good info than my
original
query.  The last summary is below.  Additional emails have been
exchanged
with:

	Dave Landsiedel	dave_landsiedel@bobcat.com
	Larry McCann	lmccann@hill.ucs.ualberta.ca
	Mark E. Drummond	mark.drummond@sun.com
	One other who requested anonymity

and especially with:

 	Christophe Dupre [duprec@scorec.rpi.edu]

I have now received much better info giving me a 90% probability that
(many) E250s do indeed interleave memory.  The only reason it's not
100% is because Larry McCann's system does not seem to have the
relevant "memory-interleave" nvram variable.  His firmware is way
out of date though, and even though the patch for that says nothing
about memory interleaving, he plans to try upgrading it anyway.


> I asked:
> > I know the E-450 uses two-way and four-way interleaving.  I am
> > looking at configuring an E-250, but can find no mention of this
> > in its manuals.  Should I spread 1GB across all 16 slots, or use
> > larger DIMMs in only 8 slots?
> 
> I received a few answers from:
> 
> 	Mike's List [mikelist@sky.net]
> 	Christophe Dupre [duprec@scorec.rpi.edu]
> 	Ben Tierney [ben@securitycomputer.com]
> 
> Mike says "yes I think so".
> Christophe says "yes if all slots have the same size DIMMs".
> Ben thinks "no".
> 
> Only Ben supports his opinion with any references, saying that the
> engineer handbook does not mention it.
> 
> In fact, I've read every doc I can find (including those mentioned by
> Mike) and have found no mention of it.  The E450 docs mention it
> prominently.  Therefor I strongly suspect that the E250 does *not*
> do memory interleaving.  I await proof, however.

[demime 0.99c.1 removed an attachment of type application/x-pkcs7-signature which had a name of smime.p7s]
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Received on Fri Feb 8 10:45:25 2002

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