DOKK / manpages / debian 12 / libnvme-dev / nvme_id_ns_mc.2.en
libnvme(2) API Manual libnvme(2)

enum nvme_id_ns_mc - This field indicates the capabilities for metadata.

enum nvme_id_ns_mc {
NVME_NS_MC_EXTENDED ,
NVME_NS_MC_SEPARATE

};

If set, indicates the namespace supports the metadata being transferred as part of a separate buffer that is specified in the Metadata Pointer.
If set, indicates that the namespace supports the metadata being transferred as part of an extended data LBA.
enum nvme_id_ns_mc January 2023