D42247.id128888.diff
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D42247.id128888.diff
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	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;