libnvme(2)

✨ NAME ✨

struct nvme_cmd_effects_log — the Commands Supported and Effects Log, bestie 💖

So like, this is one of those structs from libnvme(2), the API Manual situation, and it's lowkey the receipts of what your NVMe drive can actually do. It's giving "menu of commands" energy. Obsessed.

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🌸 SYNOPSIS 🌸

struct nvme_cmd_effects_log {
    __le32 acs[256];
    __le32 iocs[256];
    __u8 rsvd[2048];
 };

No cap, that's the whole shape of it. Three members, very demure, very mindful. <purple>acs</purple> and <purple>iocs</purple> each get 256 entries of __le32, and then <purple>rsvd</purple> just... chills in 2048 bytes of __u8 doing absolutely nothing. Main character energy from the arrays, background extra for the reserved part. 💅

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🎀 Members 🎀

• acs — Admin Command Supported. This is your admin-side tea ☕ — the array of 256 __le32 entries telling you which admin commands are supported.
• iocs — I/O Command Supported. Same vibe, different lane 🌈 — 256 __le32 entries for the I/O commands that are supported.
• rsvd — Reserved. Literally just 2048 bytes of __u8 sitting there. Do not touch her, she's resting 😭. It's reserved, so leave it alone — fr fr, that's what reserved means.

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Okay but seriously bestie, <hotpink>Reservedfields are not a suggestion. You don't write to them, you don't read meaning out of them. They're placeholders so future versions can use that space. Respect thersvd`. 🫶

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That's the whole page, iykyk 🦋 And a cute little sign-off for the source vibes: this beauty is from libnvme(2), dated July 2026. Slay, go read your drive's effects log. ✨👑💖