libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

enum nvme\_id\_ctrl\_vwc - Volatile write cache

# [SYNOPSIS](#SYNOPSIS)

enum nvme\_id\_ctrl\_vwc {  
**NVME\_CTRL\_VWC\_PRESENT** ,  
**NVME\_CTRL\_VWC\_FLUSH**

};

# [Constants](#Constants)

[NVME\_CTRL\_VWC\_PRESENT](#NVME_CTRL_VWC_PRESENT)

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.

[NVME\_CTRL\_VWC\_FLUSH](#NVME_CTRL_VWC_FLUSH)

Mask to get the value of the flush command behavior.

enum nvme\_id\_ctrl\_vwc October 2026

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Document: nvme_id_ctrl_vwc-libnvme3(2) from nvme-cli 3.2-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli