diff --git a/services/applypatch/data_writer.cpp b/services/applypatch/data_writer.cpp
index a42ac3df1b7e721d4df85c04f1bcaf86cd3f6fbf..3accdfdcc1d0a959b488e966c0ef2de56a6a849b 100644
--- a/services/applypatch/data_writer.cpp
+++ b/services/applypatch/data_writer.cpp
@@ -56,6 +56,12 @@ int DataWriter::OpenPath(const std::string &path)
     return fd;
 }
 
+bool DataWriter::Sync(void)
+{
+    LOG(WARNING) << "sync unimplemented";
+    return true;
+}
+
 std::unique_ptr<DataWriter> DataWriter::CreateDataWriter(WriteMode mode, const std::string &path,
     uint64_t offset)
 {
diff --git a/services/applypatch/raw_writer.cpp b/services/applypatch/raw_writer.cpp
index 50bdfcc2269e1c522894a0b16bb6c5e21f8f126e..dae3d58975c2809ebfea80b611e8632efa6c44a7 100644
--- a/services/applypatch/raw_writer.cpp
+++ b/services/applypatch/raw_writer.cpp
@@ -77,4 +77,18 @@ int RawWriter::WriteInternal(int fd, const uint8_t *data, size_t len)
     offset_ += static_cast<off64_t>(len);
     return 0;
 }
+
+bool RawWriter::Sync(void)
+{
+    if (fd_ < 0) {
+        LOG(ERROR) << "invalid fd " << fd_;
+        return false;
+    }
+    if (fsync(fd_) != 0) {
+        LOG(ERROR) << "fsync failed, errno is " << errno;
+        return false;
+    }
+    LOG(INFO) << "fsync successfully " << fd_;
+    return true;
+}
 } // namespace Updater
diff --git a/services/applypatch/raw_writer.h b/services/applypatch/raw_writer.h
index 2057225c90b8c22334c1b59c34f17900818f9eb3..f5d7a35029ad46d25baf26eea286d7d1f3023c90 100644
--- a/services/applypatch/raw_writer.h
+++ b/services/applypatch/raw_writer.h
@@ -26,7 +26,7 @@ namespace Updater {
 class RawWriter : public DataWriter {
 public:
     bool Write(const uint8_t *addr, size_t len, const void *context) override;
-
+    bool Sync(void) override;
     RawWriter(const std::string path, uint64_t offset) : fd_(-1), path_(path), offset_(offset) {}
     RawWriter(const std::string path, uint64_t startAddr, uint64_t offset) : fd_(-1),
         path_(path), offset_(startAddr + offset) {}
diff --git a/services/include/applypatch/data_writer.h b/services/include/applypatch/data_writer.h
index 21503f41c505b6fbecaa0c8c105e65dceeebb5f7..9df5d81f660e1c51de013f71cc9349a1c9f82d77 100644
--- a/services/include/applypatch/data_writer.h
+++ b/services/include/applypatch/data_writer.h
@@ -35,6 +35,7 @@ public:
     using WriterConstructor = std::unique_ptr<DataWriter> (*)(const std::string &, const std::string &,
         uint64_t, uint64_t);
     virtual bool Write(const uint8_t *addr, size_t len, const void *context) = 0;
+    virtual bool Sync(void);
     virtual ~DataWriter() {}
     static std::unique_ptr<DataWriter> CreateDataWriter(WriteMode mode, const std::string &path, UpdaterEnv *env,
         uint64_t offset = 0);