.TH "libnvme" 2 "enum nvme_id_ctrl_vwc" "February 2024" "API Manual" LINUX .SH NAME enum nvme_id_ctrl_vwc \- Volatile write cache .SH SYNOPSIS enum nvme_id_ctrl_vwc { .br .BI " NVME_CTRL_VWC_PRESENT" , .br .br .BI " NVME_CTRL_VWC_FLUSH" }; .SH Constants .IP "NVME_CTRL_VWC_PRESENT" 12 If set, indicates a volatile write cache is present. If a volatile write cache is present, then the host controls whether the volatile write cache is enabled with a Set Features command specifying the value NVME_FEAT_FID_VOLATILE_WC. .IP "NVME_CTRL_VWC_FLUSH" 12 Mask to get the value of the flush command behavior.