libnvme(9) API Manual libnvme(9)

# [NAME](#NAME)

struct nvme\_reachability\_group\_desc - Reachability Group Descriptor

# [SYNOPSIS](#SYNOPSIS)

struct nvme\_reachability\_group\_desc {  
**\_\_le32 rgid;**  
**\_\_le32 nnid;**  
**\_\_le64 chngc;**  
**\_\_u8 rsvd16\[16];**  
**\_\_le32 nsid\[];**  
};

# [Members](#Members)

[rgid](#rgid)

Reachability Group ID

[nnid](#nnid)

Number of NSID Values

[chngc](#chngc)

Change Count

[rsvd16](#rsvd16)

Reserved

[nsid](#nsid)

Namespace Identifier List

struct nvme\_reachability\_group\_desc October 2026

---

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