diff --git a/Create.c b/Create.c
index 2da07d0..6a49183 100644
--- a/Create.c
+++ b/Create.c
@@ -251,7 +251,9 @@ int Create(struct supertype *st, char *mddev,
 		s->size &= ~(unsigned long long)(s->chunk - 1);
 	newsize = s->size * 2;
 	if (st && ! st->ss->validate_geometry(st, s->level, s->layout, s->raiddisks,
-					      &s->chunk, s->size*2, NULL, &newsize, c->verbose>=0))
+					      &s->chunk, s->size*2,
+					      INVALID_SECTORS, NULL,
+					      &newsize, c->verbose>=0))
 		return 1;
 
 	if (s->chunk && s->chunk != UnSet) {
@@ -332,8 +334,9 @@ int Create(struct supertype *st, char *mddev,
 					s->layout = default_layout(st, s->level, c->verbose);
 				switch (st->ss->validate_geometry(
 						st, s->level, s->layout, s->raiddisks,
-						&s->chunk, s->size*2, dname, &freesize,
-						c->verbose > 0)) {
+						&s->chunk, s->size*2,
+						INVALID_SECTORS, dname,
+						&freesize, c->verbose > 0)) {
 				case -1: /* Not valid, message printed, and not
 					  * worth checking any further */
 					exit(2);
@@ -368,8 +371,9 @@ int Create(struct supertype *st, char *mddev,
 				s->layout = default_layout(st, s->level, 0);
 			if (!st->ss->validate_geometry(st, s->level, s->layout,
 						       s->raiddisks,
-						       &s->chunk, s->size*2, dname,
-						       &freesize,
+						       &s->chunk, s->size*2,
+						       INVALID_SECTORS,
+						       dname, &freesize,
 						       c->verbose >= 0)) {
 
 				pr_err("%s is not suitable for "
@@ -470,6 +474,7 @@ int Create(struct supertype *st, char *mddev,
 			if (!st->ss->validate_geometry(st, s->level, s->layout,
 						       s->raiddisks,
 						       &s->chunk, minsize*2,
+						       INVALID_SECTORS,
 						       NULL, NULL, 0)) {
 				pr_err("devices too large for RAID level %d\n", s->level);
 				return 1;
diff --git a/Manage.c b/Manage.c
index 9b5c82b..d2b92a2 100644
--- a/Manage.c
+++ b/Manage.c
@@ -549,7 +549,7 @@ int Manage_add(int fd, int tfd, struct mddev_dev *dv,
 	if (tst->ss->validate_geometry(
 		    tst, array->level, array->layout,
 		    array->raid_disks, NULL,
-		    ldsize >> 9, NULL, NULL, 0) == 0) {
+		    ldsize >> 9, INVALID_SECTORS, NULL, NULL, 0) == 0) {
 		if (!force) {
 			pr_err("%s is larger than %s can "
 			       "effectively use.\n"
diff --git a/mdadm.h b/mdadm.h
index 322af06..04e7d0f 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -778,6 +778,7 @@ extern struct superswitch {
 	int (*validate_geometry)(struct supertype *st, int level, int layout,
 				 int raiddisks,
 				 int *chunk, unsigned long long size,
+				 unsigned long long data_offset,
 				 char *subdev, unsigned long long *freesize,
 				 int verbose);
 
diff --git a/super-ddf.c b/super-ddf.c
index fbcdef6..7ab8f2c 100644
--- a/super-ddf.c
+++ b/super-ddf.c
@@ -2581,18 +2581,21 @@ static int
 validate_geometry_ddf_container(struct supertype *st,
 				int level, int layout, int raiddisks,
 				int chunk, unsigned long long size,
+				unsigned long long data_offset,
 				char *dev, unsigned long long *freesize,
 				int verbose);
 
 static int validate_geometry_ddf_bvd(struct supertype *st,
 				     int level, int layout, int raiddisks,
 				     int *chunk, unsigned long long size,
+				     unsigned long long data_offset,
 				     char *dev, unsigned long long *freesize,
 				     int verbose);
 
 static int validate_geometry_ddf(struct supertype *st,
 				 int level, int layout, int raiddisks,
 				 int *chunk, unsigned long long size,
+				 unsigned long long data_offset,
 				 char *dev, unsigned long long *freesize,
 				 int verbose)
 {
@@ -2615,7 +2618,8 @@ static int validate_geometry_ddf(struct supertype *st,
 		/* Must be a fresh device to add to a container */
 		return validate_geometry_ddf_container(st, level, layout,
 						       raiddisks, chunk?*chunk:0,
-						       size, dev, freesize,
+						       size, data_offset, dev,
+						       freesize,
 						       verbose);
 	}
 
@@ -2652,7 +2656,8 @@ static int validate_geometry_ddf(struct supertype *st,
 		 * Should make a distinction one day.
 		 */
 		return validate_geometry_ddf_bvd(st, level, layout, raiddisks,
-						 chunk, size, dev, freesize,
+						 chunk, size, data_offset, dev,
+						 freesize,
 						 verbose);
 	}
 	/* This is the first device for the array.
@@ -2710,6 +2715,7 @@ static int validate_geometry_ddf(struct supertype *st,
 			close(cfd);
 			return validate_geometry_ddf_bvd(st, level, layout,
 							 raiddisks, chunk, size,
+							 data_offset,
 							 dev, freesize,
 							 verbose);
 		}
@@ -2724,6 +2730,7 @@ static int
 validate_geometry_ddf_container(struct supertype *st,
 				int level, int layout, int raiddisks,
 				int chunk, unsigned long long size,
+				unsigned long long data_offset,
 				char *dev, unsigned long long *freesize,
 				int verbose)
 {
@@ -2758,6 +2765,7 @@ validate_geometry_ddf_container(struct supertype *st,
 static int validate_geometry_ddf_bvd(struct supertype *st,
 				     int level, int layout, int raiddisks,
 				     int *chunk, unsigned long long size,
+				     unsigned long long data_offset,
 				     char *dev, unsigned long long *freesize,
 				     int verbose)
 {
diff --git a/super-gpt.c b/super-gpt.c
index fa7fdab..6244657 100644
--- a/super-gpt.c
+++ b/super-gpt.c
@@ -196,6 +196,7 @@ static struct supertype *match_metadata_desc(char *arg)
 static int validate_geometry(struct supertype *st, int level,
 			     int layout, int raiddisks,
 			     int *chunk, unsigned long long size,
+			     unsigned long long data_offset,
 			     char *subdev, unsigned long long *freesize,
 			     int verbose)
 {
diff --git a/super-intel.c b/super-intel.c
index 74b6f61..561fa34 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -5279,7 +5279,9 @@ static int imsm_bbm_log_size(struct imsm_super *mpb)
 #ifndef MDASSEMBLE
 static int validate_geometry_imsm_container(struct supertype *st, int level,
 					    int layout, int raiddisks, int chunk,
-					    unsigned long long size, char *dev,
+					    unsigned long long size,
+					    unsigned long long data_offset,
+					    char *dev,
 					    unsigned long long *freesize,
 					    int verbose)
 {
@@ -5341,7 +5343,7 @@ static int validate_geometry_imsm_container(struct supertype *st, int level,
 		}
 	}
 
-	*freesize = avail_size_imsm(st, ldsize >> 9, INVALID_SECTORS);
+	*freesize = avail_size_imsm(st, ldsize >> 9, data_offset);
 	free_imsm(super);
 
 	return 1;
@@ -5878,7 +5880,9 @@ validate_geometry_imsm_orom(struct intel_super *super, int level, int layout,
  */
 static int validate_geometry_imsm_volume(struct supertype *st, int level,
 					 int layout, int raiddisks, int *chunk,
-					 unsigned long long size, char *dev,
+					 unsigned long long size,
+					 unsigned long long data_offset,
+					 char *dev,
 					 unsigned long long *freesize,
 					 int verbose)
 {
@@ -6161,6 +6165,7 @@ static int reserve_space(struct supertype *st, int raiddisks,
 
 static int validate_geometry_imsm(struct supertype *st, int level, int layout,
 				  int raiddisks, int *chunk, unsigned long long size,
+				  unsigned long long data_offset,
 				  char *dev, unsigned long long *freesize,
 				  int verbose)
 {
@@ -6176,7 +6181,8 @@ static int validate_geometry_imsm(struct supertype *st, int level, int layout,
 		/* Must be a fresh device to add to a container */
 		return validate_geometry_imsm_container(st, level, layout,
 							raiddisks,
-							chunk?*chunk:0, size,
+							chunk?*chunk:0,
+							size, data_offset,
 							dev, freesize,
 							verbose);
 	}
@@ -6219,6 +6225,7 @@ static int validate_geometry_imsm(struct supertype *st, int level, int layout,
 		/* creating in a given container */
 		return validate_geometry_imsm_volume(st, level, layout,
 						     raiddisks, chunk, size,
+						     data_offset,
 						     dev, freesize, verbose);
 	}
 
@@ -6263,7 +6270,7 @@ static int validate_geometry_imsm(struct supertype *st, int level, int layout,
 			close(cfd);
 			return validate_geometry_imsm_volume(st, level, layout,
 							     raiddisks, chunk,
-							     size, dev,
+							     size, data_offset, dev,
 							     freesize, 1)
 				? 1 : -1;
 		}
@@ -9905,7 +9912,7 @@ enum imsm_reshape_type imsm_analyze_change(struct supertype *st,
 				    imsm_layout,
 				    geo->raid_disks + devNumChange,
 				    &chunk,
-				    geo->size,
+				    geo->size, INVALID_SECTORS,
 				    0, 0, 1))
 		change = -1;
 
diff --git a/super-mbr.c b/super-mbr.c
index bbbc65b..4218619 100644
--- a/super-mbr.c
+++ b/super-mbr.c
@@ -187,6 +187,7 @@ static struct supertype *match_metadata_desc(char *arg)
 static int validate_geometry(struct supertype *st, int level,
 			     int layout, int raiddisks,
 			     int *chunk, unsigned long long size,
+			     unsigned long long data_offset,
 			     char *subdev, unsigned long long *freesize,
 			     int verbose)
 {
diff --git a/super0.c b/super0.c
index a26e2e0..983ef85 100644
--- a/super0.c
+++ b/super0.c
@@ -1124,6 +1124,7 @@ static void free_super0(struct supertype *st)
 static int validate_geometry0(struct supertype *st, int level,
 			      int layout, int raiddisks,
 			      int *chunk, unsigned long long size,
+			      unsigned long long data_offset,
 			      char *subdev, unsigned long long *freesize,
 			      int verbose)
 {
diff --git a/super1.c b/super1.c
index 1e4597b..ba7563b 100644
--- a/super1.c
+++ b/super1.c
@@ -1902,6 +1902,7 @@ static void free_super1(struct supertype *st)
 static int validate_geometry1(struct supertype *st, int level,
 			      int layout, int raiddisks,
 			      int *chunk, unsigned long long size,
+			      unsigned long long data_offset,
 			      char *subdev, unsigned long long *freesize,
 			      int verbose)
 {
@@ -1933,7 +1934,7 @@ static int validate_geometry1(struct supertype *st, int level,
 	}
 	close(fd);
 
-	*freesize = avail_size1(st, ldsize >> 9, INVALID_SECTORS);
+	*freesize = avail_size1(st, ldsize >> 9, data_offset);
 	return 1;
 }
 #endif /* MDASSEMBLE */