libnvme(2)

💖 NAME 💖

okay so bestie, gather round — this is libnvme, and this page is all about one very specific little struct:

struct nvme_id_independent_id_ns — aka the Identify - I/O Command Set Independent Identify Namespace Data Structure. yes that's a mouthful. yes it's iconic. no we are not shortening it. 💅

It lives in the libnvme API manual, in section 2, so if you see libnvme(2) floating around that's just where we're at. 🦋

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✨ SYNOPSIS ✨

struct nvme_id_independent_id_ns {
    __u8 nsfeat;
    __u8 nmic;
    __u8 rescap;
    __u8 fpi;
    __le32 anagrpid;
    __u8 nsattr;
    __u8 rsvd9;
    __le16 nvmsetid;
    __le16 endgid;
    __u8 nstat;
    __u8 kpios;
    __le16 maxkt;
    __u8 rsvd18[2];
    __le32 rgrpid;
    __u8 rsvd24[4072];
 };

look at her. 4072 bytes of reserved space and she still slays. 👑

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🌸 Members 🌸

okay now the main character energy — let's meet every single field, no skips, no cuts, fr fr:

• nsfeat — the common namespace features. lowkey the basics but we love her. ✨
• nmic — Namespace Multi-path I/O and Namespace Sharing Capabilities. it's giving “can this namespace be shared tho” energy. 🫶
• rescap — Reservation Capabilities. what she can reserve. periodt.
• fpi — Format Progress Indicator. yes bestie, formats take time and she will tell you about it. ⏳
• anagrpid — ANA Group Identifier. Asymmetric Namespace Access but make it a group chat id. 💬
• nsattr — Namespace Attributes. the vibe check of the namespace itself.
• rsvd9 — reserved. 💀 do not touch. she's resting.
• nvmsetid — NVM Set Identifier. which NVM set she belongs to. found family. 🥰
• endgid — Endurance Group Identifier. her endurance group — staying power, honestly iconic. 🔥
• nstat — Namespace Status. the "how's she doing" field. we love a status update. 🩺
• kpios — Key Per I/O Status. Key Per I/O but a status. iykyk. 🔑
• maxkt — Maximum Key Tag. the biggest key tag allowed. big tag energy. 🏷️
• rsvd18 — Reserved. another nap spot. 🙈
• rgrpid — Reachability Group Identifier. Reachability Group, as an id. she's reachable. she's available. 💖
• rsvd24 — Reserved. the final nap spot, and honestly? she earned it. 😴

no cap: some of these are literally just <red>reserved</red> and you should leave them alone. the manpage said reserved. we respect the reserved. 🫡

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🎀 and that's the whole struct 🎀

that's it bestie, that's the page. every field, every byte, every reserved lil nap zone accounted for. she's a whole data structure and she's doing great. 🌈

okay bye ily — this was the struct nvme_id_independent_id_ns page out of libnvme(2), stamped July 2026, brought to you by libnvme. mwah 💋 ✨🦋🌸💜