Index: /trunk/src/VBox/Runtime/common/filesystem/fatvfs.cpp
===================================================================
--- /trunk/src/VBox/Runtime/common/filesystem/fatvfs.cpp	(revision 66690)
+++ /trunk/src/VBox/Runtime/common/filesystem/fatvfs.cpp	(revision 66691)
@@ -2228,4 +2228,5 @@
 {
     Assert(uWriteLock == UINT32_C(0x80000001));
+    RT_NOREF(uWriteLock);
     if (pThis->fFullyBuffered)
     {
@@ -3388,5 +3389,5 @@
         Assert(RTListIsEmpty(&pThis->pRootDir->OpenChildren));
         uint32_t cRefs = RTVfsDirRelease(pThis->hVfsRootDir);
-        Assert(cRefs == 0);
+        Assert(cRefs == 0); NOREF(cRefs);
         pThis->hVfsRootDir = NIL_RTVFSDIR;
         pThis->pRootDir    = NULL;