libnvme(9)

✨ NAME ✨

okay so bestie, welcome to libnvme(9) — this is the API manual page for struct nvme_endurance_group_log, aka the Endurance Group Information Log. it's the struct that holds all the endurance-group tea, and yes it's giving "big log energy" 💅

🌸 SYNOPSIS 🌸

here's the shape of it, exactly as it lives in the headers, no cap:

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];
};

lowkey obsessed with how tidy that layout is. 16-byte fields as far as the eye can see 🫶

🎀 Members 🎀

okay now the member-by-member vibe check, one bullet per field, nothing skipped:

• critical_warning — Critical Warning. yes bestie, pay attention to this one 🔥
• endurance_group_features — Endurance Group Features.
• rsvd2 — Reserved. (it's reserved. we don't touch it. periodt 💀)
• avl_spare — Available Spare.
• avl_spare_threshold — Available Spare Threshold.
• percent_used — Percentage Used.
• domain_identifier — Domain Identifier. it's a __le16, so little-endian, iykyk ✨
• rsvd8 — Reserved. more reserved space, more respect 🎀
• endurance_estimate — Endurance Estimate.
• data_units_read — Data Units Read.
• data_units_written — Data Units Written.
• media_units_written — Media Units Written.
• host_read_cmds — Host Read Commands.
• host_write_cmds — Host Write Commands.
• media_data_integrity_err — Media and Data Integrity Errors. the one you hope stays at zero 🙈
• num_err_info_log_entries — Number of Error Information Log Entries.
• total_end_grp_cap — Total Endurance Group Capacity.
• unalloc_end_grp_cap — Unallocated Endurance Group Capacity.
• rsvd192 — Reserved. the big one. 320 bytes of pure reserved icon behavior 👑

ngl bestie, all those [16] arrays are just raw bytes — the struct doesn't convert anything for you, so that's your job. and please do NOT go writing into the rsvd* fields, they are reserved for a reason 😭

and that's the whole page, fr fr 💖 this was struct nvme_endurance_group_log from the API Manual — page libnvme(9), dated October 2026. slay, go log some endurance groups responsibly 🌈⭐🦋