libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

enum nvme\_flbas - This field indicates the formatted LBA size

# [SYNOPSIS](#SYNOPSIS)

enum nvme\_flbas {  
**NVME\_FLBAS\_LOWER\_SHIFT** ,  
**NVME\_FLBAS\_META\_EXT\_SHIFT** ,  
**NVME\_FLBAS\_HIGHER\_SHIFT** ,  
**NVME\_FLBAS\_LOWER\_MASK** ,  
**NVME\_FLBAS\_META\_EXT\_MASK** ,  
**NVME\_FLBAS\_HIGHER\_MASK**

};

# [Constants](#Constants)

[NVME\_FLBAS\_LOWER\_SHIFT](#NVME_FLBAS_LOWER_SHIFT)

Shift amount to get the format index least significant 4 bits

[NVME\_FLBAS\_META\_EXT\_SHIFT](#NVME_FLBAS_META_EXT_SHIFT)

Shift amount to get the metadata transferred

[NVME\_FLBAS\_HIGHER\_SHIFT](#NVME_FLBAS_HIGHER_SHIFT)

Shift amount to get the format index most significant 2 bits

[NVME\_FLBAS\_LOWER\_MASK](#NVME_FLBAS_LOWER_MASK)

Mask to get the format index least significant 4 bits

[NVME\_FLBAS\_META\_EXT\_MASK](#NVME_FLBAS_META_EXT_MASK)

Mask to get the metadata transferred

[NVME\_FLBAS\_HIGHER\_MASK](#NVME_FLBAS_HIGHER_MASK)

Mask to get the format index most significant 2 bits

enum nvme\_flbas October 2026

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