ndctl read-labels <nmem0> [<nmem1>..<nmemN>] [<options>]
A nmemX device name, or a dimm id number. Restrict the operation to the specified dimm(s). The keyword all can be specified to
indicate the lack of any restriction, however this is the same as not supplying a --dimm option at all.
Limit the operation to the given number of bytes. A size of 0 indicates to operate over the entire label capacity.
Begin the operation at the given offset into the label area.
A bus id number, or a provider string (e.g. "ACPI.NFIT"). Restrict the operation to the specified bus(es). The keyword all can be
specified to indicate the lack of any restriction, however this is the same as not supplying a --bus option at all.
Turn on verbose debug messages in the library (if ndctl was built with logging and debug enabled).
Limit the span of the label operation to just the index-block area. This is useful to determine if the dimm label area is
initialized. Note that this option and --size/--offset are mutually exclusive.
parse the label data into json assuming the NVDIMM Namespace Specification format.
enable json output and convert number formats to human readable strings, for example show the size in terms of "KB", "MB", "GB", etc
instead of a signed 64-bit numbers per the JSON interchange format (implies --json).