ndctl check-labels <nmem0> [<nmem1>..<nmemN>] [<options>]
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. In addition to checking if a label area has a valid index block, running this command in verbose mode reports the reason the index block is deemed invalid.
Copyright (c) 2016 - 2019, Intel Corporation. License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
UEFI NVDIMM Label Protocol <http://www.uefi.org/sites/default/files/resources/UEFI_Spec_2_7.pdf>