---
name: "tcg_l0_ns_geometry-libnvme3"
section: "2"
platform: "linux"
package: "nvme-cli"
version: "3.2-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/tcg_l0_ns_geometry-libnvme3"
---

# tcg\_l0\_ns\_geometry-libnvme3(2)

Namespace Geometry Reporting feature (0x0405)

## NAME

struct tcg\_l0\_ns\_geometry - Namespace Geometry Reporting feature (0x0405)

## SYNOPSIS

struct tcg\_l0\_ns\_geometry {\
     **\_\_u8 align;**\
     **\_\_u8 rsvd1\[7\];**\
     **\_\_be32 logical\_block\_size;**\
     **\_\_be64 alignment\_granularity;**\
     **\_\_be64 lowest\_aligned\_lba;**\
 };\

## Members

- align

  Flags, see *enum tcg\_l0\_ns\_geometry\_flags*

- rsvd1

  Reserved

- logical\_block\_size

  Logical block size

- alignment\_granularity

  Alignment granularity

- lowest\_aligned\_lba

  Lowest aligned LBA

## Description

TCG Storage Opal SSC Feature Set: Configurable Namespace Locking, section 4.2.1.