diff --git a/sys/geom/bde/g_bde.c b/sys/geom/bde/g_bde.c
index 47a3645b899..614139c8811 100644
--- a/sys/geom/bde/g_bde.c
+++ b/sys/geom/bde/g_bde.c
@@ -254,6 +254,7 @@ g_bde_create(struct g_createargs *ga)
 		g_topology_lock();
 		pp = g_new_providerf(gp, gp->name);
 		pp->mediasize = sc->mediasize;
+		pp->sectorsize = sc->sectorsize;
 		g_error_provider(pp, 0);
 		g_topology_unlock();
 		break;
diff --git a/sys/geom/geom.h b/sys/geom/geom.h
index 4eebbdfd200..d12b901f6d6 100644
--- a/sys/geom/geom.h
+++ b/sys/geom/geom.h
@@ -169,6 +169,7 @@ struct g_provider {
 	TAILQ_ENTRY(g_provider)	orphan;
 	int			index;
 	off_t			mediasize;
+	u_int			sectorsize;
 };
 
 /*
diff --git a/sys/geom/geom_bsd.c b/sys/geom/geom_bsd.c
index 7818bbc2110..f8688e1d97a 100644
--- a/sys/geom/geom_bsd.c
+++ b/sys/geom/geom_bsd.c
@@ -369,6 +369,7 @@ g_bsd_modify(struct g_geom *gp, struct disklabel *dl)
 		error = g_slice_config(gp, i, G_SLICE_CONFIG_CHECK,
 		    (off_t)ppp->p_offset * dl->d_secsize,
 		    (off_t)ppp->p_size * dl->d_secsize,
+		     dl->d_secsize,
 		    "%s%c", gp->name, 'a' + i);
 		if (error) {
 			g_topology_unlock();
@@ -382,6 +383,7 @@ g_bsd_modify(struct g_geom *gp, struct disklabel *dl)
 		g_slice_config(gp, i, G_SLICE_CONFIG_SET,
 		    (off_t)ppp->p_offset * dl->d_secsize,
 		    (off_t)ppp->p_size * dl->d_secsize,
+		     dl->d_secsize,
 		    "%s%c", gp->name, 'a' + i);
 	}
 	return (0);
diff --git a/sys/geom/geom_disk.c b/sys/geom/geom_disk.c
index 37cf533386b..5e2f93944a0 100644
--- a/sys/geom/geom_disk.c
+++ b/sys/geom/geom_disk.c
@@ -99,6 +99,7 @@ g_disk_access(struct g_provider *pp, int r, int w, int e)
 		error = 0;
 	}
         pp->mediasize = dp->d_mediasize;
+        pp->sectorsize = dp->d_sectorsize;
 	return (error);
 }
 
diff --git a/sys/geom/geom_dump.c b/sys/geom/geom_dump.c
index b8c9c8bc4dd..3827229548a 100644
--- a/sys/geom/geom_dump.c
+++ b/sys/geom/geom_dump.c
@@ -146,6 +146,7 @@ g_conf_provider(struct sbuf *sb, struct g_provider *pp)
 	sbuf_printf(sb, "\t  <name>%s</name>\n", pp->name);
 	sbuf_printf(sb, "\t  <mediasize>%jd</mediasize>\n",
 	    (intmax_t)pp->mediasize);
+	sbuf_printf(sb, "\t  <sectorsize>%u</sectorsize>\n", pp->sectorsize);
 	if (pp->geom->dumpconf) {
 		sbuf_printf(sb, "\t  <config>\n");
 		pp->geom->dumpconf(sb, "\t    ", pp->geom, NULL, pp);
diff --git a/sys/geom/geom_gpt.c b/sys/geom/geom_gpt.c
index 7bad00fd16e..ef23af060f3 100644
--- a/sys/geom/geom_gpt.c
+++ b/sys/geom/geom_gpt.c
@@ -226,6 +226,7 @@ g_gpt_taste(struct g_class *mp, struct g_provider *pp, int insist)
 			(void)g_slice_addslice(gp, i, 
 			    ent->ent_lba_start * secsz,
 			    (1 + ent->ent_lba_end - ent->ent_lba_start) * secsz,
+			    secsz,
 			    "%s%c%d", gp->name, ps, i + 1);
 			g_topology_unlock();
 			npart++;
diff --git a/sys/geom/geom_mbr.c b/sys/geom/geom_mbr.c
index 46442b1cb80..418fa4df730 100644
--- a/sys/geom/geom_mbr.c
+++ b/sys/geom/geom_mbr.c
@@ -242,8 +242,9 @@ g_mbr_taste(struct g_class *mp, struct g_provider *pp, int insist)
 			ms->type[i] = dp[i].dp_typ;
 			g_topology_lock();
 			pp2 = g_slice_addslice(gp, i,
-			    ((off_t)dp[i].dp_start) << 9ULL,
-			    ((off_t)dp[i].dp_size) << 9ULL,
+			    (off_t)dp[i].dp_start << 9ULL,
+			    (off_t)dp[i].dp_size << 9ULL,
+			    sectorsize,
 			    "%ss%d", gp->name, i + 1);
 			g_topology_unlock();
 		}
@@ -378,6 +379,7 @@ g_mbrext_taste(struct g_class *mp, struct g_provider *pp, int insist __unused)
 				pp2 = g_slice_addslice(gp, slice,
 				    (((off_t)dp[0].dp_start) << 9ULL) + off,
 				    ((off_t)dp[0].dp_size) << 9ULL,
+				    sectorsize,
 				    "%*.*s%d",
 				    strlen(gp->name) - 1,
 				    strlen(gp->name) - 1,
diff --git a/sys/geom/geom_pc98.c b/sys/geom/geom_pc98.c
index 9e68bf7cb78..a47724f5f54 100644
--- a/sys/geom/geom_pc98.c
+++ b/sys/geom/geom_pc98.c
@@ -162,6 +162,7 @@ g_pc98_taste(struct g_class *mp, struct g_provider *pp, int flags)
 			g_topology_lock();
 			pp2 = g_slice_addslice(gp, i,
 			    start, length,
+			    sectorsize,
 			    "%ss%d", pp->name, 1 + i);
 			g_topology_unlock();
 			g_error_provider(pp2, 0);
diff --git a/sys/geom/geom_slice.c b/sys/geom/geom_slice.c
index 2cfc99872d3..64745bf0096 100644
--- a/sys/geom/geom_slice.c
+++ b/sys/geom/geom_slice.c
@@ -118,7 +118,6 @@ g_slice_access(struct g_provider *pp, int dr, int dw, int de)
 	if ((cp->acr + dr) == 0 && (cp->acw + dw) == 0 && (cp->ace + de) == 1)
 		de--;
 	error = g_access_rel(cp, dr, dw, de);
-	pp->mediasize = gsp->slices[pp->index].length;
 	return (error);
 }
 
@@ -228,7 +227,7 @@ g_slice_dumpconf(struct sbuf *sb, char *indent, struct g_geom *gp, struct g_cons
 }
 
 int
-g_slice_config(struct g_geom *gp, int index, int how, off_t offset, off_t length, char *fmt, ...)
+g_slice_config(struct g_geom *gp, int index, int how, off_t offset, off_t length, u_int sectorsize, char *fmt, ...)
 {
 	struct g_provider *pp;
 	struct g_slicer *gsp;
@@ -261,6 +260,7 @@ g_slice_config(struct g_geom *gp, int index, int how, off_t offset, off_t length
 		return (0);
 	gsl->length = length;
 	gsl->offset = offset;
+	gsl->sectorsize = sectorsize;
 	if (length != 0 && pp != NULL)
 		return (0);
 	if (length == 0 && pp == NULL)
@@ -277,6 +277,8 @@ g_slice_config(struct g_geom *gp, int index, int how, off_t offset, off_t length
 	sbuf_finish(sb);
 	pp = g_new_providerf(gp, sbuf_data(sb));
 	pp->index = index;
+	pp->mediasize = gsl->length;
+	pp->sectorsize = gsl->sectorsize;
 	gsl->provider = pp;
 	gsp->nprovider++;
 	g_error_provider(pp, 0);
@@ -285,7 +287,7 @@ g_slice_config(struct g_geom *gp, int index, int how, off_t offset, off_t length
 }
 
 struct g_provider *
-g_slice_addslice(struct g_geom *gp, int index, off_t offset, off_t length, char *fmt, ...)
+g_slice_addslice(struct g_geom *gp, int index, off_t offset, off_t length, u_int sectorsize, char *fmt, ...)
 {
 	struct g_provider *pp;
 	struct g_slicer *gsp;
@@ -305,6 +307,9 @@ g_slice_addslice(struct g_geom *gp, int index, off_t offset, off_t length, char
 	gsp->slices[index].length = length;
 	gsp->slices[index].offset = offset;
 	gsp->slices[index].provider = pp;
+	gsp->slices[index].sectorsize = sectorsize;
+	pp->mediasize = gsp->slices[index].length;
+	pp->sectorsize = gsp->slices[index].sectorsize;
 	sbuf_delete(sb);
 	return(pp);
 }
diff --git a/sys/geom/geom_slice.h b/sys/geom/geom_slice.h
index 8a1a27f985e..11be04754c4 100644
--- a/sys/geom/geom_slice.h
+++ b/sys/geom/geom_slice.h
@@ -41,6 +41,7 @@
 struct g_slice {
 	off_t	offset;
 	off_t	length;
+	u_int	sectorsize;
 	struct	g_provider *provider;
 };
 
@@ -57,8 +58,8 @@ struct g_slicer {
 };
 
 g_dumpconf_t g_slice_dumpconf;
-struct g_provider * g_slice_addslice(struct g_geom *gp, int index, off_t offset, off_t length, char *fmt, ...);
-int g_slice_config(struct g_geom *gp, int index, int how, off_t offset, off_t length, char *fmt, ...);
+struct g_provider * g_slice_addslice(struct g_geom *gp, int index, off_t offset, off_t length, u_int sectorsize, char *fmt, ...);
+int g_slice_config(struct g_geom *gp, int index, int how, off_t offset, off_t length, u_int sectorsize, char *fmt, ...);
 #define G_SLICE_CONFIG_CHECK	0
 #define G_SLICE_CONFIG_SET	1
 #define G_SLICE_CONFIG_FORCE	2
diff --git a/sys/geom/geom_sunlabel.c b/sys/geom/geom_sunlabel.c
index 97a7390903f..78d496a9bac 100644
--- a/sys/geom/geom_sunlabel.c
+++ b/sys/geom/geom_sunlabel.c
@@ -172,6 +172,7 @@ g_sunlabel_taste(struct g_class *mp, struct g_provider *pp, int flags)
 			pp2 = g_slice_addslice(gp, i,
 			    ((off_t)v * csize) << 9ULL,
 			    ((off_t)u) << 9ULL,
+			    sectorsize,
 			    "%s%c", pp->name, 'a' + i);
 			g_topology_unlock();
 			g_error_provider(pp2, 0);