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Dell EMC NVDIMM-N Persistent Memory User Guide

Linux Errata

Following errata effects RHEL 7.6:

  • Patch to make ndctl utility work can be downloaded from here https://access.redhat.com/solutions/3920221
  • Red Hat Enterprise Linux 7.6 or later might lose access to the data on NVDIMM-N memory module after updating from NVDIMM-N firmware version 8860 to 9234 or later. To restore access to the data, in Red Hat Enterprise Linux 7.6 Command-Line Interface, login to root user and run the following commands:
    NOTE:Ensure that the RHEL 7.6 create-namespace patch above is installed.
    1. ndctl disable-region all
    2. ndctl disable-dimm all
    3. ndctl zero-labels all
    4. ndctl enable-dimm all
    5. ndctl enable-region all
    6. Recreate namespaces in the mode previously used (i.e. ndctl create-namespace --mode=devdax --align=4k)
    7. Repeat the create-namespace command above for every NVDIMM-N installed.

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