Documentation for ndctl and daxctl


ndctl-write-labels - write data to the label area on a dimm


ndctl write-labels <nmem> [-i <filename>]


The namespace label area is a small persistent partition of capacity available on some NVDIMM devices. The label area is used to resolve aliasing between pmem and blk capacity by delineating namespace boundaries. Read data from the input filename, or stdin, and write it to the given <nmem> device. Note that the device must not be active in any region, otherwise the kernel will not allow write access to the device’s label data area.


<memory device(s)>
One or more nmemX device names. The keyword all can be specified to operate on every dimm in the system, optionally filtered by bus id (see –bus= option).

-b; --bus=
Limit operation to memory devices (dimms) that are on the given bus. Where bus can be a provider name or a bus id number.

Turn on verbose debug messages in the library (if ndctl was built with logging and debug enabled).

-i; --input
input file


UEFI NVDIMM Label Protocol