diff --git a/sbin/geom/class/part/geom_part.c b/sbin/geom/class/part/geom_part.c
index 94b67da85838..357db3f3c3c9 100644
--- a/sbin/geom/class/part/geom_part.c
+++ b/sbin/geom/class/part/geom_part.c
@@ -187,17 +187,23 @@ static struct gprovider *
 find_provider(struct ggeom *gp, unsigned long long minsector)
 {
 	struct gprovider *pp, *bestpp;
-	unsigned long long offset;
+	const char *s;
 	unsigned long long sector, bestsector;
 
 	bestpp = NULL;
 	LIST_FOREACH(pp, &gp->lg_provider, lg_provider) {
-		offset = atoll(find_provcfg(pp, "offset"));
-		sector = offset / pp->lg_sectorsize;
+		s = find_provcfg(pp, "start");
+		if (s == NULL) {
+			s = find_provcfg(pp, "offset");
+			sector = atoll(s) / pp->lg_sectorsize;
+		} else
+			sector = atoll(s);
+
 		if (sector < minsector)
 			continue;
 		if (bestpp != NULL && sector >= bestsector)
 			continue;
+
 		bestpp = pp;
 		bestsector = sector;
 	}
@@ -240,7 +246,7 @@ gpart_show_geom(struct ggeom *gp, const char *element)
 	struct gprovider *pp;
 	const char *s, *scheme;
 	unsigned long long first, last, sector, end;
-	unsigned long long offset, length, secsz;
+	unsigned long long length, secsz;
 	int idx, wblocks, wname;
 
 	scheme = find_geomcfg(gp, "scheme");
@@ -258,14 +264,24 @@ gpart_show_geom(struct ggeom *gp, const char *element)
 	    scheme, fmtsize(pp->lg_mediasize));
 
 	while ((pp = find_provider(gp, first)) != NULL) {
-		s = find_provcfg(pp, "offset");
-		offset = atoll(s);
-		sector = offset / secsz;
-		s = find_provcfg(pp, "length");
-		length = atoll(s);
+		s = find_provcfg(pp, "start");
+		if (s == NULL) {
+			s = find_provcfg(pp, "offset");
+			sector = atoll(s) / secsz;
+		} else
+			sector = atoll(s);
+
+		s = find_provcfg(pp, "end");
+		if (s == NULL) {
+			s = find_provcfg(pp, "length");
+			length = atoll(s) / secsz;
+			end = sector + length - 1;
+		} else {
+			end = atoll(s);
+			length = end - sector + 1;
+		}
 		s = find_provcfg(pp, "index");
 		idx = atoi(s);
-		end = sector + length / secsz;
 		if (first < sector) {
 			printf("  %*llu  %*llu  %*s  - free -  (%s)\n",
 			    wblocks, first, wblocks, sector - first,
@@ -273,16 +289,17 @@ gpart_show_geom(struct ggeom *gp, const char *element)
 			    fmtsize((sector - first) * secsz));
 		}
 		printf("  %*llu  %*llu  %*d  %s %s (%s)\n",
-		    wblocks, sector, wblocks, end - sector,
+		    wblocks, sector, wblocks, length,
 		    wname, idx, find_provcfg(pp, element),
 		    fmtattrib(pp), fmtsize(pp->lg_mediasize));
-		first = end;
+		first = end + 1;
 	}
 	if (first <= last) {
+		length = last - first + 1;
 		printf("  %*llu  %*llu  %*s  - free -  (%s)\n",
-		    wblocks, first, wblocks, last - first + 1,
+		    wblocks, first, wblocks, length,
 		    wname, "",
-		    fmtsize((last - first + 1) * secsz));
+		    fmtsize(length * secsz));
 	}
 	printf("\n");
 }