HP Dl385 Server ESXI server memory error "the Bios reports that numa node 1 has no memory"

Posted on 2009-12-22
Last Modified: 2012-06-27
Howdy all,

I have just added a second processor to a HP DL385 running the free esxi 4 64Bit.  I have 2x 2GB sticks and 4x 4GB sticks in the machine.  After I added the second processor it comes up with the above error within vmware.  I ha\ve spread the memory accross the two banks but it says they are not in pairs????

Please help.

Question by:Smartin
    LVL 7

    Accepted Solution


    Ensure your server conforms to Non-Uniform Memory Access (NUMA) rules and regulations
    Note: If you are not experienced with computers, please contact your hardware vendor.
    Note: Problems related to NUMA usually occur following a RAM upgrade or after an ESX Server host installation.

    You might see an error such as the following:

    The BIOS reports that NUMA node 1 has no memory. This problem is either caused by a bad BIOS or a very unbalanced distribution of memory modules.
    NUMA is a system where each processor has separate memory. The separate memory helps to avoid a performance hit when several processors attempt to address the same memory.
    The main requirement is that a similar amount of memory is installed beside each processor. If the amount of memory installed beside each processor is not not similar, it is unbalanced and you might experience performance problems. For more information, see ESX Server Memory Management on Systems with AMD Opteron Processors (1570)

    More information on NUMA is also available in the Resource Management Guide .
    LVL 7

    Expert Comment

    Notice: AMD Opteron-based ProLiant Servers Running VMware ESX Server Version 2.5.3 (and Later) that are NUMA Enabled Must Have Memory Installed in Pairs and Evenly Distributed Across all Processor Nodes or the VMkernel Will Not Load
    LVL 7

    Expert Comment

    Take out the 2x2GB sticks... and leave the 4x4GB stick in, spread across the banks; do you still get the errors?
    LVL 42

    Expert Comment

    Login via ILO and take a look at the memory banks.  Make sure you don't mix memory types

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