diff -r 73ea206103e6 -r 43365a9b78a3 userlibandfileserver/fileserver/sfile/sf_cache_man.cpp
--- a/userlibandfileserver/fileserver/sfile/sf_cache_man.cpp	Wed Jun 23 19:44:53 2010 +0300
+++ b/userlibandfileserver/fileserver/sfile/sf_cache_man.cpp	Tue Jul 06 15:50:07 2010 +0300
@@ -177,7 +177,7 @@
 	iMaxLockedSegments = TGlobalFileCacheSettings::MaxLockedSize() >> KSegmentSizeLog2;
 
 #ifdef __SIMULATE_LOCK_FAILURES__
-	iSimulateLockFailureMode = ETrue;
+	iSimulateLockFailureMode = EFalse;	// off by default unless switched on by KControlIoSimulateLockFailureMode
 #endif
 	}