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

enum nvme_nd_ns_fpi - If a format operation is in progress, this field indicates the percentage of the namespace that remains to be formatted.

enum nvme_nd_ns_fpi {
NVME_NS_FPI_REMAINING ,
NVME_NS_FPI_SUPPORTED

};

Mask to get the format percent remaining value
If set, indicates that the namespace supports the Format Progress Indicator defined for the field.
enum nvme_nd_ns_fpi January 2023