libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

struct tcg\_l0\_header - Level 0 Discovery header

# [SYNOPSIS](#SYNOPSIS)

struct tcg\_l0\_header {  
**\_\_be32 length;**  
**\_\_be32 revision;**  
**\_\_u8 rsvd8\[8];**  
**\_\_u8 vs\[32];**  
};

# [Members](#Members)

[length](#length)

Length of the parameter data, excluding this field

[revision](#revision)

Data structure revision

[rsvd8](#rsvd8)

Reserved

[vs](#vs)

Vendor specific

# [Description](#Description)

TCG Opal SSC 2.02, section 3.1.1.1.

struct tcg\_l0\_header October 2026

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Document: tcg_l0_header-libnvme3(2) from nvme-cli 3.2-r0 (Chainguard OS)
Source: https://github.com/linux-nvme/nvme-cli