diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
index 006fd6f33571..51f4b4c40f09 100644
--- a/fs/exofs/exofs.h
+++ b/fs/exofs/exofs.h
@@ -217,6 +217,7 @@ static inline void exofs_init_comps(struct ore_components *oc,
 	one_comp->obj.id = oid;
 	exofs_make_credential(one_comp->cred, &one_comp->obj);
 
+	oc->first_dev = 0;
 	oc->numdevs = sbi->layout.group_width * sbi->layout.mirrors_p1 *
 							sbi->layout.group_count;
 	oc->single_comp = EC_SINGLE_COMP;
diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c
index 8354fe061d1c..f1b718028a1f 100644
--- a/fs/exofs/ore.c
+++ b/fs/exofs/ore.c
@@ -62,6 +62,10 @@ static struct osd_obj_id *_ios_obj(struct ore_io_state *ios, unsigned index)
 
 static struct osd_dev *_ios_od(struct ore_io_state *ios, unsigned index)
 {
+	ORE_DBGMSG2("oc->first_dev=%d oc->numdevs=%d i=%d oc->ods=%p\n",
+		    ios->oc->first_dev, ios->oc->numdevs, index,
+		    ios->oc->ods);
+
 	return ore_comp_dev(ios->oc, index);
 }
 
diff --git a/include/scsi/osd_ore.h b/include/scsi/osd_ore.h
index baeef0200a1f..492b70d43bb6 100644
--- a/include/scsi/osd_ore.h
+++ b/include/scsi/osd_ore.h
@@ -49,6 +49,7 @@ struct ore_dev {
 };
 
 struct ore_components {
+	unsigned	first_dev;		/* First logical device no    */
 	unsigned	numdevs;		/* Num of devices in array    */
 	/* If @single_comp == EC_SINGLE_COMP, @comps points to a single
 	 * component. else there are @numdevs components
@@ -70,14 +71,14 @@ struct ore_components {
 static inline struct osd_dev *ore_comp_dev(
 	const struct ore_components *oc, unsigned i)
 {
-	BUG_ON(oc->numdevs <= i);
-	return oc->ods[i]->od;
+	BUG_ON((i < oc->first_dev) || (oc->first_dev + oc->numdevs <= i));
+	return oc->ods[i - oc->first_dev]->od;
 }
 
 static inline void ore_comp_set_dev(
 	struct ore_components *oc, unsigned i, struct osd_dev *od)
 {
-	oc->ods[i]->od = od;
+	oc->ods[i - oc->first_dev]->od = od;
 }
 
 struct ore_striping_info {