diff --git a/lib/storage/storage.go b/lib/storage/storage.go
index dcbc9b6f4..e1177f88c 100644
--- a/lib/storage/storage.go
+++ b/lib/storage/storage.go
@@ -596,10 +596,15 @@ func (s *Storage) startFreeDiskSpaceWatcher() {
 		freeSpaceBytes := fs.MustGetFreeSpace(s.path)
 		if freeSpaceBytes < freeDiskSpaceLimitBytes {
 			// Switch the storage to readonly mode if there is no enough free space left at s.path
+			logger.Warnf("switching the storage at %s to read-only mode, since it has less than -storage.minFreeDiskSpaceBytes=%d of free space: %d bytes left",
+				s.path, freeDiskSpaceLimitBytes, freeSpaceBytes)
 			atomic.StoreUint32(&s.isReadOnly, 1)
 			return
 		}
-		atomic.StoreUint32(&s.isReadOnly, 0)
+		if atomic.CompareAndSwapUint32(&s.isReadOnly, 1, 0) {
+			logger.Warnf("enabling writing to the storage at %s, since it has more than -storage.minFreeDiskSpaceBytes=%d of free space: %d bytes left",
+				s.path, freeDiskSpaceLimitBytes, freeSpaceBytes)
+		}
 	}
 	f()
 	s.freeDiskSpaceWatcherWG.Add(1)