diff --git a/kernel/mars_copy.c b/kernel/mars_copy.c
index 5dc07e6d..55903c91 100644
--- a/kernel/mars_copy.c
+++ b/kernel/mars_copy.c
@@ -450,7 +450,7 @@ restart:
 
 		status = _make_mref(brick, index, 0, NULL, pos, brick->copy_end, READ, brick->verify_mode ? 2 : 0);
 		if (unlikely(status < 0)) {
-			MARS_WRN("status = %d\n", status);
+			MARS_DBG("status = %d\n", status);
 			progress = status;
 			break;
 		}
@@ -465,7 +465,7 @@ restart:
 	case COPY_STATE_START2:
 		status = _make_mref(brick, index, 1, NULL, pos, brick->copy_end, READ, 2);
 		if (unlikely(status < 0)) {
-			MARS_WRN("status = %d\n", status);
+			MARS_DBG("status = %d\n", status);
 			progress = status;
 			break;
 		}
@@ -528,7 +528,7 @@ restart:
 			_clear_mref(brick, index, 0);
 			status = _make_mref(brick, index, 0, NULL, pos, brick->copy_end, READ, 0);
 			if (unlikely(status < 0)) {
-				MARS_WRN("status = %d\n", status);
+				MARS_DBG("status = %d\n", status);
 				progress = status;
 				next_state = COPY_STATE_RESET;
 				break;
@@ -567,7 +567,7 @@ restart:
 		/* start writeout */
 		status = _make_mref(brick, index, 1, mref0->ref_data, pos, pos + mref0->ref_len, WRITE, 0);
 		if (unlikely(status < 0)) {
-			MARS_WRN("status = %d\n", status);
+			MARS_DBG("status = %d\n", status);
 			progress = status;
 			next_state = COPY_STATE_RESET;
 			break;
@@ -621,7 +621,7 @@ idle:
 	if (unlikely(progress < 0)) {
 		if (st->error >= 0)
 			st->error = progress;
-		MARS_WRN("progress = %d\n", progress);
+		MARS_DBG("progress = %d\n", progress);
 		progress = 0;
 		_clash(brick);
 	} else if (do_restart) {