Is my NVDIMM RAM supported by Red Hat Enterprise Linux?

Updated -

Environment

  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • System equipped with NVDIMM RAM Modules

Issue

Is my NVDIMM RAM supported by Red Hat Enterprise Linux?

Resolution

Red Hat Enterprise Linux 6

The infrastructure for Non-Volatile Dual In-line Memory Module (NVDIMM RAM) support is not available in Red Hat Enterprise Linux 6. As such a system with NVDIMM RAM running RHEL 6 will not see the NVDIMM RAM modules. Red Hat Enterprise Linux 6 does not support NVDIMM RAM technology and it is not planned to support it in any future release.

Red Hat Enterprise Linux 7 and 8

Support for Non-Volatile Dual In-line Memory Module (NVDIMM RAM) persistent memory architecture via the libnvdimm kernel subsystem is available in Red Hat Enterprise Linux 7 starting with Update 3 (RHEL 7.3) and is in Red Hat Enterprise Linux 8 starting with its initial release (RHEL 8.0). The table below documents the release in which the NVDIMM modes became available.

Mode RHEL 7 RHEL 8
sector 7.3 (7.6 when used as a boot device) 8.0
fsdax 7.3 (Technology Preview) 8.0 (Technology Preview)
devdax 7.4 8.0
raw 7.3 8.0

For further information and guidance on using NVDIMM technology with Red Hat Enterprise Linux please see the following documentation resources: