Dell PowerEdge R740 EMC NVDIMM-N Persistent Memory User Guide - Page 47

Linux Errata

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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 CommandLine 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. Linux 47

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Linux Errata
Following errata effects RHEL 7.6:
•
Patch to make ndctl utility work can be downloaded from here
•
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.
Linux
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