Index: sources/device/DeviceController.cpp
===================================================================
diff -u -rcad1ea2c3c42c93461f4197921f8a5938fe872c8 -r170fd9a04fab2e2ba96bdc16ca39f86789895937
--- sources/device/DeviceController.cpp	(.../DeviceController.cpp)	(revision cad1ea2c3c42c93461f4197921f8a5938fe872c8)
+++ sources/device/DeviceController.cpp	(.../DeviceController.cpp)	(revision 170fd9a04fab2e2ba96bdc16ca39f86789895937)
@@ -996,7 +996,7 @@
     if ( isBootPOST && isCurrent ) {
         // no log backup if it is the BootPOST log file, only rename and add the serial to it.
         fileDest = QString("%1/%2.%3").arg(filePath, fileBase.prepend(_Logger.logFileNameHDSN() + _Logger.fileSeparator()), fileInfo.completeSuffix());
-        ok = QFile::rename(fileSrc, fileDest);
+        ok = FileHandler::append(fileSrc, fileDest, true);
         return false;
     }