diff --git a/lib/config/config.c b/lib/config/config.c
index 32b3c6611..6f9d413db 100644
--- a/lib/config/config.c
+++ b/lib/config/config.c
@@ -667,7 +667,8 @@ static void _log_type_error(const char *path, cfg_def_type_t actual,
 }
 
 static struct dm_config_value *_get_def_array_values(struct dm_config_tree *cft,
-						     const cfg_def_item_t *def)
+						     const cfg_def_item_t *def,
+						     uint32_t format_flags)
 {
 	char *enc_value, *token, *p, *r;
 	struct dm_config_value *array = NULL, *v = NULL, *oldv = NULL;
@@ -678,6 +679,7 @@ static struct dm_config_value *_get_def_array_values(struct dm_config_tree *cft,
 			return NULL;
 		}
 		array->type = DM_CFG_EMPTY_ARRAY;
+		dm_config_value_set_format_flags(array, format_flags);
 		return array;
 	}
 
@@ -710,6 +712,9 @@ static struct dm_config_value *_get_def_array_values(struct dm_config_tree *cft,
 			dm_free(enc_value);
 			return NULL;
 		}
+
+		dm_config_value_set_format_flags(v, format_flags);
+
 		if (oldv)
 			oldv->next = v;
 		if (!array)
@@ -839,7 +844,7 @@ static int _check_value_differs_from_default(struct cft_check_handle *handle,
 	}
 
 	if (!v_def && (def->type & CFG_TYPE_ARRAY)) {
-		if (!(v_def_array = v_def_iter = _get_def_array_values(handle->cft, def)))
+		if (!(v_def_array = v_def_iter = _get_def_array_values(handle->cft, def, 0)))
 			return_0;
 		do {
 			/* iterate over each element of the array and check its value */
@@ -1739,15 +1744,19 @@ static struct dm_config_node *_add_def_node(struct dm_config_tree *cft,
 {
 	struct dm_config_node *cn;
 	const char *str;
+	uint32_t format_flags = 0;
 
 	if (!(cn = dm_config_create_node(cft, def->name))) {
 		log_error("Failed to create default config setting node.");
 		return NULL;
 	}
 
-	if (!(def->type & CFG_TYPE_SECTION) && (!(cn->v = dm_config_create_value(cft)))) {
-		log_error("Failed to create default config setting node value.");
-		return NULL;
+	if (!(def->type & CFG_TYPE_SECTION) && !(def->type & CFG_TYPE_ARRAY)) {
+		if (!(cn->v = dm_config_create_value(cft))) {
+			log_error("Failed to create default config setting node value.");
+			return NULL;
+		}
+		format_flags |= DM_CONFIG_VALUE_FMT_COMMON_EXTRA_SPACES;
 	}
 
 	cn->id = def->id;
@@ -1755,6 +1764,9 @@ static struct dm_config_node *_add_def_node(struct dm_config_tree *cft,
 	if (spec->unconfigured && def->default_unconfigured_value.v_UNCONFIGURED) {
 		cn->v->type = DM_CFG_STRING;
 		cn->v->v.str = cfg_def_get_default_unconfigured_value_hint(spec->cmd, def);
+		if (def->type != CFG_TYPE_STRING)
+			format_flags |= DM_CONFIG_VALUE_FMT_STRING_NO_QUOTES;
+		dm_config_value_set_format_flags(cn->v, format_flags);
 	} else if (!(def->type & CFG_TYPE_ARRAY)) {
 		switch (def->type) {
 			case CFG_TYPE_SECTION:
@@ -1767,6 +1779,8 @@ static struct dm_config_node *_add_def_node(struct dm_config_tree *cft,
 			case CFG_TYPE_INT:
 				cn->v->type = DM_CFG_INT;
 				cn->v->v.i = cfg_def_get_default_value_hint(spec->cmd, def, CFG_TYPE_INT, NULL);
+				if (def->flags & CFG_FORMAT_INT_OCTAL)
+					format_flags |= DM_CONFIG_VALUE_FMT_INT_OCTAL;
 				break;
 			case CFG_TYPE_FLOAT:
 				cn->v->type = DM_CFG_FLOAT;
@@ -1783,8 +1797,12 @@ static struct dm_config_node *_add_def_node(struct dm_config_tree *cft,
 				return NULL;
 				break;
 		}
-	} else
-		cn->v = _get_def_array_values(cft, def);
+		dm_config_value_set_format_flags(cn->v, format_flags);
+	} else {
+		format_flags |= (DM_CONFIG_VALUE_FMT_COMMON_ARRAY |
+				 DM_CONFIG_VALUE_FMT_COMMON_EXTRA_SPACES);
+		cn->v = _get_def_array_values(cft, def, format_flags);
+	}
 
 	cn->child = NULL;
 	if (parent) {
diff --git a/lib/config/config.h b/lib/config/config.h
index 0b7221cea..b03ad6bde 100644
--- a/lib/config/config.h
+++ b/lib/config/config.h
@@ -119,6 +119,8 @@ typedef union {
 #define CFG_DEFAULT_RUN_TIME	0x100
 /* whether the configuration setting is disabled (and hence defaults always used) */
 #define CFG_DISABLED		0x200
+/* whether to print integers in octal form (prefixed by "0") */
+#define CFG_FORMAT_INT_OCTAL	0x400
 
 /* configuration definition item structure */
 typedef struct cfg_def_item {
diff --git a/lib/config/config_settings.h b/lib/config/config_settings.h
index 5c7b1324d..f8ea57973 100644
--- a/lib/config/config_settings.h
+++ b/lib/config/config_settings.h
@@ -50,6 +50,7 @@
  *                                 CFG_DEFAULT_UNDEFINED - node's default value is undefined (depends on other system/kernel values outside of lvm)
  *                                 CFG_DEFAULT_COMMENTED - node's default value is commented out on output
  *                                 CFG_DISABLED - configuration is disabled (defaults always used)
+ *                                 CFG_FORMAT_INT_OCTAL - print integer number in octal form (also prefixed by "0")
  *
  * type:		       Allowed type for the value of simple configuation setting, one of:
  *                                 CFG_TYPE_BOOL
diff --git a/libdm/.exported_symbols.DM_1_02_100 b/libdm/.exported_symbols.DM_1_02_100
new file mode 100644
index 000000000..00d7d5b10
--- /dev/null
+++ b/libdm/.exported_symbols.DM_1_02_100
@@ -0,0 +1,2 @@
+dm_config_value_set_format_flags
+dm_config_value_get_format_flags
diff --git a/libdm/libdevmapper.h b/libdm/libdevmapper.h
index cbd4f3d91..7476aef73 100644
--- a/libdm/libdevmapper.h
+++ b/libdm/libdevmapper.h
@@ -1847,6 +1847,7 @@ struct dm_config_value {
 	} v;
 
 	struct dm_config_value *next;	/* For arrays */
+	uint32_t format_flags;
 };
 
 struct dm_config_node {
@@ -1949,6 +1950,24 @@ struct dm_config_node *dm_config_create_node(struct dm_config_tree *cft, const c
 struct dm_config_value *dm_config_create_value(struct dm_config_tree *cft);
 struct dm_config_node *dm_config_clone_node(struct dm_config_tree *cft, const struct dm_config_node *cn, int siblings);
 
+/*
+ * Common formatting flags applicable to all config node types (lower 16 bits).
+ */
+#define DM_CONFIG_VALUE_FMT_COMMON_ARRAY             0x00000001 /* value is array */
+#define DM_CONFIG_VALUE_FMT_COMMON_EXTRA_SPACES      0x00000002 /* add spaces in "key = value" pairs in constrast to "key=value" for better readability */
+
+/*
+ * Type-related config node formatting flags (higher 16 bits).
+ */
+/* int-related formatting flags */
+#define DM_CONFIG_VALUE_FMT_INT_OCTAL                0x00010000 /* print number in octal form */
+
+/* string-related formatting flags */
+#define DM_CONFIG_VALUE_FMT_STRING_NO_QUOTES         0x00010000 /* do not print quotes around string value */
+
+void dm_config_value_set_format_flags(struct dm_config_value *cv, uint32_t format_flags);
+uint32_t dm_config_value_get_format_flags(struct dm_config_value *cv);
+
 struct dm_pool *dm_config_memory(struct dm_config_tree *cft);
 
 /* Udev device directory. */
diff --git a/libdm/libdm-config.c b/libdm/libdm-config.c
index f7b07a513..7b2897212 100644
--- a/libdm/libdm-config.c
+++ b/libdm/libdm-config.c
@@ -273,11 +273,13 @@ static int _line_end(const struct dm_config_node *cn, struct config_output *out)
 static int _write_value(struct config_output *out, const struct dm_config_value *v)
 {
 	char *buf;
+	const char *s;
 
 	switch (v->type) {
 	case DM_CFG_STRING:
 		buf = alloca(dm_escaped_len(v->v.str));
-		line_append("\"%s\"", dm_escape_double_quotes(buf, v->v.str));
+		s = (v->format_flags & DM_CONFIG_VALUE_FMT_STRING_NO_QUOTES) ? "" : "\"";
+		line_append("%s%s%s", s, dm_escape_double_quotes(buf, v->v.str), s);
 		break;
 
 	case DM_CFG_FLOAT:
@@ -285,11 +287,15 @@ static int _write_value(struct config_output *out, const struct dm_config_value
 		break;
 
 	case DM_CFG_INT:
-		line_append("%" PRId64, v->v.i);
+		if (v->format_flags & DM_CONFIG_VALUE_FMT_INT_OCTAL)
+			line_append("0%" PRIo64, v->v.i);
+		else
+			line_append("%" PRId64, v->v.i);
 		break;
 
 	case DM_CFG_EMPTY_ARRAY:
-		line_append("[]");
+		s = (v->format_flags & DM_CONFIG_VALUE_FMT_COMMON_EXTRA_SPACES) ? " " : "";
+		line_append("[%s]", s);
 		break;
 
 	default:
@@ -303,6 +309,8 @@ static int _write_value(struct config_output *out, const struct dm_config_value
 static int _write_config(const struct dm_config_node *n, int only_one,
 			 struct config_output *out, int level)
 {
+	const char *extra_space;
+	int format_array;
 	char space[MAX_INDENT + 1];
 	int l = (level < MAX_INDENT) ? level : MAX_INDENT;
 	int i;
@@ -316,6 +324,9 @@ static int _write_config(const struct dm_config_node *n, int only_one,
 	space[i] = '\0';
 
 	do {
+		extra_space = (n->v && (n->v->format_flags & DM_CONFIG_VALUE_FMT_COMMON_EXTRA_SPACES)) ? " " : "";
+		format_array = (n->v && (n->v->format_flags & DM_CONFIG_VALUE_FMT_COMMON_ARRAY));
+
 		if (out->spec && out->spec->prefix_fn)
 			out->spec->prefix_fn(n, space, out->baton);
 
@@ -341,20 +352,25 @@ static int _write_config(const struct dm_config_node *n, int only_one,
 		} else {
 			/* it's a value */
 			const struct dm_config_value *v = n->v;
-			line_append("=");
+			line_append("%s=%s", extra_space, extra_space);
 			if (v->next) {
-				line_append("[");
+				line_append("[%s", extra_space);
 				while (v && v->type != DM_CFG_EMPTY_ARRAY) {
 					if (!_write_value(out, v))
 						return_0;
 					v = v->next;
 					if (v && v->type != DM_CFG_EMPTY_ARRAY)
-						line_append(", ");
+						line_append(",%s", extra_space);
 				}
-				line_append("]");
-			} else
+				line_append("%s]", extra_space);
+			} else {
+				if (format_array && (v->type != DM_CFG_EMPTY_ARRAY))
+					line_append("[%s", extra_space);
 				if (!_write_value(out, v))
 					return_0;
+				if (format_array && (v->type != DM_CFG_EMPTY_ARRAY))
+					line_append("%s]", extra_space);
+			}
 		}
 		if (!_line_end(n, out))
 			return_0;
@@ -1328,6 +1344,22 @@ struct dm_config_value *dm_config_create_value(struct dm_config_tree *cft)
 	return _create_value(cft->mem);
 }
 
+void dm_config_value_set_format_flags(struct dm_config_value *cv, uint32_t format_flags)
+{
+	if (!cv)
+		return;
+
+	cv->format_flags = format_flags;
+}
+
+uint32_t dm_config_value_get_format_flags(struct dm_config_value *cv)
+{
+	if (!cv)
+		return 0;
+
+	return cv->format_flags;
+}
+
 struct dm_pool *dm_config_memory(struct dm_config_tree *cft)
 {
 	return cft->mem;