diff --git a/src/mngt/ocf_mngt_core.c b/src/mngt/ocf_mngt_core.c
index 8f22dd2..de29774 100644
--- a/src/mngt/ocf_mngt_core.c
+++ b/src/mngt/ocf_mngt_core.c
@@ -63,10 +63,12 @@ static int _ocf_uuid_set(const struct ocf_volume_uuid *uuid,
 	if (result)
 		return result;
 
-	result = env_memset(muuid->data + uuid->size,
-			sizeof(muuid->data) - uuid->size, 0);
-	if (result)
-		return result;
+	if (uuid->size < sizeof(muuid->data)) {
+		result = env_memset(muuid->data + uuid->size,
+				sizeof(muuid->data) - uuid->size, 0);
+		if (result)
+			return result;
+	}
 
 	muuid->size = uuid->size;
 
diff --git a/src/mngt/ocf_mngt_core_pool.c b/src/mngt/ocf_mngt_core_pool.c
index 5555d58..c76dba9 100644
--- a/src/mngt/ocf_mngt_core_pool.c
+++ b/src/mngt/ocf_mngt_core_pool.c
@@ -44,7 +44,7 @@ int ocf_mngt_core_pool_add(ocf_ctx_t ctx, ocf_uuid_t uuid, uint8_t type)
 
 	result = ocf_volume_open(volume, NULL);
 	if (result) {
-		ocf_volume_deinit(volume);
+		ocf_volume_destroy(volume);
 		return result;
 	}
 
diff --git a/src/mngt/ocf_mngt_flush.c b/src/mngt/ocf_mngt_flush.c
index a7d9460..8960c87 100644
--- a/src/mngt/ocf_mngt_flush.c
+++ b/src/mngt/ocf_mngt_flush.c
@@ -664,9 +664,6 @@ void ocf_mngt_cache_flush(ocf_cache_t cache,
 
 	OCF_CHECK_NULL(cache);
 
-	if (ocf_cache_is_standby(cache))
-		OCF_CMPL_RET(cache, priv, -OCF_ERR_CACHE_STANDBY);
-
 	if (ocf_cache_is_standby(cache)) {
 		ocf_cache_log(cache, log_err, "Cannot flush cache - cache is standby\n");
 		OCF_CMPL_RET(cache, priv, -OCF_ERR_CACHE_STANDBY);
diff --git a/src/ocf_volume.c b/src/ocf_volume.c
index 58328a8..b3ed1ea 100644
--- a/src/ocf_volume.c
+++ b/src/ocf_volume.c
@@ -263,8 +263,10 @@ void ocf_volume_submit_io(struct ocf_io *io)
 
 	ENV_BUG_ON(!volume->type->properties->ops.submit_io);
 
-	if (!volume->opened)
+	if (!volume->opened) {
 		io->end(io, -OCF_ERR_IO);
+		return;
+	}
 
 	volume->type->properties->ops.submit_io(io);
 }
@@ -275,8 +277,10 @@ void ocf_volume_submit_flush(struct ocf_io *io)
 
 	ENV_BUG_ON(!volume->type->properties->ops.submit_flush);
 
-	if (!volume->opened)
+	if (!volume->opened) {
 		io->end(io, -OCF_ERR_IO);
+		return;
+	}
 
 	if (!volume->type->properties->ops.submit_flush) {
 		ocf_io_end(io, 0);
@@ -290,8 +294,10 @@ void ocf_volume_submit_discard(struct ocf_io *io)
 {
 	ocf_volume_t volume = ocf_io_get_volume(io);
 
-	if (!volume->opened)
+	if (!volume->opened) {
 		io->end(io, -OCF_ERR_IO);
+		return;
+	}
 
 	if (!volume->type->properties->ops.submit_discard) {
 		ocf_io_end(io, 0);