NAME

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

SYNOPSIS

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

DESCRIPTION

       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.

OPTIONS

       <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).

       -s, --size=
           Limit the operation to the given number of bytes. A size of 0 indicates to operate
           over the entire label capacity.

       -O, --offset=
           Begin the operation at the given offset into the label area.

       -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.

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

       -i, --input
           input file

SEE ALSO

       UEFI NVDIMM Label Protocol
       <http://www.uefi.org/sites/default/files/resources/UEFI_Spec_2_7.pdf>