diff --git a/backup-daemon/customizesystemrestoreproxy.cpp b/backup-daemon/customizesystemrestoreproxy.cpp
index 3ab22a1..e595ebf 100755
--- a/backup-daemon/customizesystemrestoreproxy.cpp
+++ b/backup-daemon/customizesystemrestoreproxy.cpp
@@ -291,6 +291,7 @@ void CustomizeSystemRestoreProxy::restoreSystem()
             Utils::writeBackupLog(time + "," + m_curUuid + "," + QString::number(m_backupWrapper.m_type) + ",,,," + m_backupPoint.m_backupName);
 
             Utils::updateSyncFile();
+            Utils::wait(2);
             QString fileIfSync = Utils::getSysRootPath() + FILE_IF_SYNC;
             fileIfSync.replace("//", "/");
             QFileInfo file(fileIfSync);
diff --git a/backup-daemon/systemrestoreproxy.cpp b/backup-daemon/systemrestoreproxy.cpp
index 243efbc..77e52bb 100755
--- a/backup-daemon/systemrestoreproxy.cpp
+++ b/backup-daemon/systemrestoreproxy.cpp
@@ -353,6 +353,7 @@ void SystemRestoreProxy::restoreSystem()
             Utils::writeBackupLog(time + "," + m_curUuid + "," + QString::number(m_backupWrapper.m_type) + ",,,," + m_backupPoint.m_backupName);
 
             Utils::updateSyncFile();
+            Utils::wait(2);
             QString fileIfSync = Utils::getSysRootPath() + FILE_IF_SYNC;
             fileIfSync.replace("//", "/");
             QFileInfo file(fileIfSync);
diff --git a/backup-daemon/udisksystemrestoreproxy.cpp b/backup-daemon/udisksystemrestoreproxy.cpp
index c5c7717..ef86e64 100755
--- a/backup-daemon/udisksystemrestoreproxy.cpp
+++ b/backup-daemon/udisksystemrestoreproxy.cpp
@@ -406,6 +406,7 @@ void UDiskSystemRestoreProxy::restoreSystem()
             Utils::writeBackupLog(time + "," + m_curUuid + "," + QString::number(m_backupWrapper.m_type) + ",,,," + m_backupPoint.m_backupName);
 
             Utils::updateSyncFile();
+            Utils::wait(2);
             QString fileIfSync = Utils::getSysRootPath() + FILE_IF_SYNC;
             fileIfSync.replace("//", "/");
             QFileInfo file(fileIfSync);
diff --git a/common/utils.cpp b/common/utils.cpp
index 16aa53e..82f54ff 100755
--- a/common/utils.cpp
+++ b/common/utils.cpp
@@ -1279,6 +1279,8 @@ bool Utils::updateSyncFile()
 
     QTextStream out(&file);
     out << "sync" << END_LINE;
+    out.flush();
+    file.flush();
     file.close();
 
     return true;