diff --git a/sys/geom/part/g_part_gpt.c b/sys/geom/part/g_part_gpt.c
--- a/sys/geom/part/g_part_gpt.c
+++ b/sys/geom/part/g_part_gpt.c
@@ -1043,6 +1043,18 @@
 		g_free(sectbl);
 	}
 
+	/*
+	 * Warn when the lba_start doesn't meet the stanard's minimum size of
+	 * the gpt array. UEFI 2.10 section 5.3 specifies that the LBA must be
+	 * 32 (for 512 byte sectors) or 6 (4k sectors) or larger. This is
+	 * different than the number of valid entries in the gpt entry array.
+	 */
+	if (table->hdr->hdr_lba_start < GPT_MIN_RESERVED / pp->sectorsize + 2) {
+		printf("GEOM: warning: %s lba_start %llu < required min %d\n",
+		    pp->name, (unsigned long long)table->hdr->hdr_lba_start,
+		    GPT_MIN_RESERVED + 2);
+	}
+
 	basetable->gpt_first = table->hdr->hdr_lba_start;
 	basetable->gpt_last = table->hdr->hdr_lba_end;
 	basetable->gpt_entries = table->hdr->hdr_entries;