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

enum nvme_id_ctrl_nvmsr - This field reports information associated with the NVM Subsystem, see &struct nvme_id_ctrl.nvmsr.

enum nvme_id_ctrl_nvmsr {
NVME_CTRL_NVMSR_NVMESD ,
NVME_CTRL_NVMSR_NVMEE

};

If set, then the NVM Subsystem is part of an NVMe Storage Device; if cleared, then the NVM Subsystem is not part of an NVMe Storage Device.
If set’, then the NVM Subsystem is part of an NVMe Enclosure; if cleared, then the NVM Subsystem is not part of an NVMe Enclosure.
enum nvme_id_ctrl_nvmsr January 2023