.TH "libnvme" 2 "enum nvme_smart_crit" "February 2024" "API Manual" LINUX .SH NAME enum nvme_smart_crit \- Critical Warning .SH SYNOPSIS enum nvme_smart_crit { .br .BI " NVME_SMART_CRIT_SPARE" , .br .br .BI " NVME_SMART_CRIT_TEMPERATURE" , .br .br .BI " NVME_SMART_CRIT_DEGRADED" , .br .br .BI " NVME_SMART_CRIT_MEDIA" , .br .br .BI " NVME_SMART_CRIT_VOLATILE_MEMORY" , .br .br .BI " NVME_SMART_CRIT_PMR_RO" }; .SH Constants .IP "NVME_SMART_CRIT_SPARE" 12 If set, then the available spare capacity has fallen below the threshold. .IP "NVME_SMART_CRIT_TEMPERATURE" 12 If set, then a temperature is either greater than or equal to an over temperature threshold; or less than or equal to an under temperature threshold. .IP "NVME_SMART_CRIT_DEGRADED" 12 If set, then the NVM subsystem reliability has been degraded due to significant media related errors or any internal error that degrades NVM subsystem reliability. .IP "NVME_SMART_CRIT_MEDIA" 12 If set, then all of the media has been placed in read only mode. The controller shall not set this bit if the read-only condition on the media is a result of a change in the write protection state of a namespace. .IP "NVME_SMART_CRIT_VOLATILE_MEMORY" 12 If set, then the volatile memory backup device has failed. This field is only valid if the controller has a volatile memory backup solution. .IP "NVME_SMART_CRIT_PMR_RO" 12 If set, then the Persistent Memory Region has become read-only or unreliable.