libnvme(2)

💖 NAME

okay bestie, gather round — this is the manual page for libnvme, and today's episode is all about struct nvme_endurance_group_log a.k.a. the Endurance Group Information Log ✨ like, it's literally the receipts for how hard your endurance group has been working. no cap.

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🌸 SYNOPSIS

here's the whole struct, exactly as it lives in the code, no edits, no vibes-based rewriting, periodt:

struct nvme_endurance_group_log {
    __u8 critical_warning;
    __u8 endurance_group_features;
    __u8 rsvd2;
    __u8 avl_spare;
    __u8 avl_spare_threshold;
    __u8 percent_used;
    __le16 domain_identifier;
    __u8 rsvd8[24];
    __u8 endurance_estimate[16];
    __u8 data_units_read[16];
    __u8 data_units_written[16];
    __u8 media_units_written[16];
    __u8 host_read_cmds[16];
    __u8 host_write_cmds[16];
    __u8 media_data_integrity_err[16];
    __u8 num_err_info_log_entries[16];
    __u8 total_end_grp_cap[16];
    __u8 unalloc_end_grp_cap[16];
    __u8 rsvd192[320];
};

like… she's big. she's detailed. she ate 💅

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👑 MEMBERS

one field at a time, bestie, we're going through all of them, nobody gets left behind 🫶

• critical_warning — the Critical Warning field 💀 like if something's alarming in here, this is where it tells you.
• endurance_group_features — the Endurance Group Features field ✨ the whole feature situation, right here.
• rsvd2 — Reserved 🙈 hands off, not for you, it's reserved.
• avl_spare — Available Spare 🍓 the spare that's still available, iconic.
• avl_spare_threshold — Available Spare Threshold ⭐ the line where available spare becomes a situation.
• percent_used — Percentage Used 👑 like a battery percentage but for your endurance, and you WILL be checking it.
• domain_identifier — Domain Identifier 🦋 which domain we're talking about, iykyk.
• rsvd8 — Reserved 🙈 again. reserved. do not perceive it.
• endurance_estimate — Endurance Estimate</endurance_estimate> 💜 the estimate of endurance, fr fr.
• data_units_read — Data Units Read 🌈 all the data units that got read.
• data_units_written — Data Units Written 🌈 all the data units that got written.
• media_units_written — Media Units Written 🌈 media units, written, that's the whole thing.
• host_read_cmds — Host Read Commands 🎀 read commands, from the host, slay.
• host_write_cmds — Host Write Commands 🎀 write commands, from the host.
• media_data_integrity_err — Media and Data Integrity Errors 😭 the errors field. we do not want numbers here, bestie.
• num_err_info_log_entries — Number of Error Information Log Entries 💀 literally how many entries are in the error information log.
• total_end_grp_cap — Total Endurance Group Capacity 💖 the total capacity of the endurance group.
• unalloc_end_grp_cap — Unallocated Endurance Group Capacity 💖 the capacity that's still unallocated. main character energy.
• rsvd192 — Reserved 🙈 the last one. also reserved. we respect the reserved fields in this house.

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✨ gentle reminder bestie: those rsvd* fields are Reserved, so don't go poking at them like they're free real estate 💅

and that's the whole page, no skips, all 19 members accounted for 🧚

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sooo yeah, that was struct nvme_endurance_group_log from the libnvme API manual (section 2, the one and only 🫶), dated July 2026 — which is also the version/date stamp on this page, so consider this your cute little sign-off ✨ stay hydrated, check your critical_warning, and don't touch the reserved fields. bye bestie 💖🌈