diff --git a/src/engine/engine_common.h b/src/engine/engine_common.h
index 320a69f..2557c64 100644
--- a/src/engine/engine_common.h
+++ b/src/engine/engine_common.h
@@ -141,6 +141,19 @@ bool ocf_engine_map_all_sec_clean(struct ocf_request *req, uint32_t line)
 			start, end);
 }
 
+static inline
+bool ocf_engine_map_all_sec_valid(struct ocf_request *req, uint32_t line)
+{
+	uint8_t start = ocf_map_line_start_sector(req, line);
+	uint8_t end = ocf_map_line_end_sector(req, line);
+
+	if (req->map[line].status != LOOKUP_HIT)
+		return false;
+
+	return metadata_test_valid_sec(req->cache, req->map[line].coll_idx,
+			start, end);
+}
+
 /**
  * @brief Clean request (flush dirty data to the core device)
  *
diff --git a/src/engine/engine_wo.c b/src/engine/engine_wo.c
index 128ecb7..d3308a5 100644
--- a/src/engine/engine_wo.c
+++ b/src/engine/engine_wo.c
@@ -57,7 +57,7 @@ static int ocf_read_wo_cache_do(struct ocf_request *req)
 	uint32_t s, e, i;
 	uint64_t line;
 	struct ocf_map_info *entry;
-	bool dirty = false;
+	bool valid = false;
 	bool io = false;
 	uint64_t phys_prev, phys_curr = 0;
 	uint64_t io_start = 0;
@@ -83,18 +83,17 @@ static int ocf_read_wo_cache_do(struct ocf_request *req)
 		}
 
 		/* try to seek directly to the last sector */
-		if (entry->status == LOOKUP_MISS ||
-				ocf_engine_map_all_sec_clean(req, line)) {
-			/* all sectors invalid or clean */
+		if (entry->status == LOOKUP_MISS) {
+			/* all sectors invalid */
 			i = e + 1;
 			increment = SECTORS_TO_BYTES(e - s + 1);
-			dirty = false;
+			valid = false;
 		}
-		else if (ocf_engine_map_all_sec_dirty(req, line)) {
-			/* all sectors dirty */
+		else if (ocf_engine_map_all_sec_valid(req, line)) {
+			/* all sectors valid */
 			i = e + 1;
 			increment = SECTORS_TO_BYTES(e - s + 1);
-			dirty = true;
+			valid = true;
 		} else {
 			/* need to iterate through CL sector by sector */
 			i = s;
@@ -102,26 +101,26 @@ static int ocf_read_wo_cache_do(struct ocf_request *req)
 
 		do {
 			if (i <= e) {
-				 dirty = metadata_test_dirty_one(cache,
+				 valid = metadata_test_valid_one(cache,
 						entry->coll_idx, i);
 				 increment = 0;
 				 do {
 					++i;
 					increment += SECTORS_TO_BYTES(1);
-				 } while (i <= e && metadata_test_dirty_one(
+				 } while (i <= e && metadata_test_valid_one(
 						cache, entry->coll_idx, i)
-						== dirty);
+						== valid);
 			}
 
-			if (io && !dirty) {
-				/* end of sequential dirty region */
+			if (io && !valid) {
+				/* end of sequential valid region */
 				ocf_read_wo_cache_io(req, io_start,
 						offset - io_start);
 				io = false;
 			}
 
-			if (!io && dirty) {
-				/* beginning of sequential dirty region */
+			if (!io && valid) {
+				/* beginning of sequential valid region */
 				io = true;
 				io_start = offset;
 			}