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Conference mvblab::alphaserver_4100

Title:AlphaServer 4100
Moderator:MOVMON::DAVISS
Created:Tue Apr 16 1996
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:648
Total number of notes:3158

580.0. "B3002-AA mixed with B3002-AB ???" by PANTER::AUBERT () Tue Apr 29 1997 12:20

    I have an Alphaserver 4100 5/300 0MB with 4 cpus (B3002-AA).
    I have to replace cpu #3. Logistics told me that the module B3002-AA
    (uncached) is replaced by the B3002-AB (cached module).
    
    Is it possible to mix cached and uncached cpus ?
    Is there a minimum Firmware revision to do that ?
    
    Thanks for any answer.
    
    Thierry Aubert/DEC at CERN
T.RTitleUserPersonal
Name		DateLines
580.1AFW4::CUMMINSTue Apr 29 1997 12:393
    Mixing cached and uncached CPUs is not supported. Mixing different
    speed CPUs is not supported. I'm surprised that Logistics would give
    you this kind of feedback.
580.2B3001-CA is Uncached CPUVYGER::HENDERSONLTue Apr 29 1997 12:5415
    Thierry,
    
    the B3002-AA was never manufactured it was a 1MB cache module,it must be 
    B3001-CA you have, that is the 300MHz uncached CPU part number.
    
    I know this does not answer your question re mixing cached and
    uncached, in theory it should work but I will let the higher powers
    than me answer that question officially for you.
    
    
    
    
    
    
    Les
580.3HARMNY::CUMMINSTue Apr 29 1997 13:003
    Since this site is CERN, are these early protos we're dealing with
    here? .-1 is correct that we never productized the 1MB CPUs. And to
    reiterate, mixing uncached and cached CPUs is definitely not supported.
580.4no 1mbPOBOXB::STEINMANTue Apr 29 1997 13:337
    
    That is correct, we never productized B3002-AA. The only 1MB cache
    modules that were built were very early lab protos, so I'd be very
    surprised if there were indeed 1MB boards at CERN.
    
    	mo
580.5I have B3001-CA, not B3002-AAPANTER::AUBERTWed Apr 30 1997 05:4212
    First of all THANKS to all for your fast answers.
    
    I was wrong. The cpus on that system are B3001-CA but in the
    "AlphaServer 4100 Service Manual" you can read "B3002-AA 300MHz CPU,
    uncached" !!! and no mention about B3001-CA ?
    
    My problem is over as I can order through Logistics the B3001-CA.
    
    Thanks again to all.
    Regards,
    
    Thierry