diff --git a/swanlab/data/porter/__init__.py b/swanlab/data/porter/__init__.py
index 913077aa..e6e69bc9 100644
--- a/swanlab/data/porter/__init__.py
+++ b/swanlab/data/porter/__init__.py
@@ -18,7 +18,7 @@
 import wrapt
 
 from swanlab.core_python import get_client
-from swanlab.core_python.uploader import ColumnModel, ScalarModel, MediaModel, LogModel
+from swanlab.core_python.uploader import ColumnModel, ScalarModel, MediaModel
 from swanlab.core_python.uploader.thread import ThreadPool, UploadType
 from swanlab.data.store import RunStore, get_run_store, reset_run_store
 from swanlab.error import ValidationError
@@ -529,7 +529,7 @@ def _filter_media_by_step(self, metric: MediaModel) -> bool:
         """
         return filter_metric(metric.key, metric.step, self._run_store.metrics)
 
-    def _filter_log_by_epoch(self, log: LogContent) -> LogModel:
+    def _filter_log_by_epoch(self, log: LogContent) -> bool:
         """
         筛选日志数据，排除已经上传的日志
         :param log: 日志数据
diff --git a/swanlab/data/porter/datastore.py b/swanlab/data/porter/datastore.py
index abfc2fea..df52dd0b 100644
--- a/swanlab/data/porter/datastore.py
+++ b/swanlab/data/porter/datastore.py
@@ -106,8 +106,7 @@ def _scan_record(self) -> Optional[Tuple[int, bytes]]:
         self._index += LEVELDBLOG_HEADER_LEN
         data = self._fp.read(data_length)
         checksum_computed = zlib.crc32(data, self._crc[data_type]) & 0xFFFFFFFF
-        if checksum != checksum_computed:
-            raise ValidationError("Invalid record checksum, data may be corrupt")
+        assert checksum == checksum_computed, "Invalid record checksum, data may be corrupt"
         self._index += data_length
         # 3. 返回数据
         return int(data_type), data
@@ -154,7 +153,10 @@ def __iter__(self):
         return self
 
     def __next__(self):
-        record = self.scan()
+        try:
+            record = self.scan()
+        except AssertionError:
+            raise ValidationError("One record is corrupted, cannot continue scanning")
         if record is None:
             raise StopIteration("End of file reached")
         return record
diff --git a/test/sync/sync.py b/test/sync/sync.py
index 6bd1d715..a27e4726 100644
--- a/test/sync/sync.py
+++ b/test/sync/sync.py
@@ -3,8 +3,8 @@
 @file: sync.py
 @time: 2025/7/20 17:23
 @description: 测试同步功能，与同目录下的sync.sh文件配合使用，使用方式为：
-1. python test/sync/sync.py: 先运行 sync.sh，此时会要求输入 run_dir
-2. bash ./test/sync/sync.s: 然后在项目根目录下运行此脚本，他会打印出当前实验的路径，复制此路径到步骤一，按回车
+1. python test/sync/sync.py: 先运行 sync.py，此时会提示输出的日志文件夹路径，复制此路径
+2. bash ./test/sync/sync.sh: 然后在项目根目录下运行此脚本，将上一步复制的路径粘贴到命令行中，回车进行下一步
 这样将实现每五秒钟同步一次数据到云端
 """
 
diff --git a/test/unit/data/porter/test_datastore.py b/test/unit/data/porter/test_datastore.py
index 3959613d..8404b233 100644
--- a/test/unit/data/porter/test_datastore.py
+++ b/test/unit/data/porter/test_datastore.py
@@ -61,8 +61,8 @@ def test_tampered_data_content(temp_log_file):
     # 尝试读取应触发异常
     ds = DataStore()
     ds.open_for_scan(str(temp_log_file))
-    with pytest.raises(ValidationError, match="Invalid record checksum"):
-        next(ds)  # 读取第一条记录
+    with pytest.raises(AssertionError, match="Invalid record checksum"):
+        ds.scan()  # 读取第一条记录
 
 
 def test_tampered_checksum(temp_log_file):
@@ -74,8 +74,8 @@ def test_tampered_checksum(temp_log_file):
 
     ds = DataStore()
     ds.open_for_scan(str(temp_log_file))
-    with pytest.raises(ValidationError, match="Invalid record checksum"):
-        next(ds)
+    with pytest.raises(AssertionError, match="Invalid record checksum"):
+        ds.scan()
 
 
 def test_tampered_record_type(temp_log_file):
@@ -87,8 +87,8 @@ def test_tampered_record_type(temp_log_file):
 
     ds = DataStore()
     ds.open_for_scan(str(temp_log_file))
-    with pytest.raises(ValidationError, match="Invalid record checksum"):
-        next(ds)
+    with pytest.raises(AssertionError, match="Invalid record checksum"):
+        ds.scan()
 
 
 def test_tampered_multi_block_record(tmp_path):
@@ -113,7 +113,7 @@ def test_tampered_multi_block_record(tmp_path):
     # 验证读取时触发异常
     ds = DataStore()
     ds.open_for_scan(str(temp_log_file))
-    with pytest.raises(ValidationError, match="Invalid record checksum"):
+    with pytest.raises(ValidationError, match="One record is corrupted, cannot continue scanning"):
         next(ds)
 
 
@@ -139,7 +139,7 @@ def test_valid_records_after_tampered_one(temp_log_file):
     ds.open_for_scan(str(temp_log_file))
 
     # 第一条记录应失败
-    with pytest.raises(ValidationError):
+    with pytest.raises(ValidationError, match="One record is corrupted, cannot continue scanning"):
         next(ds)
 
     # 第二条记录应正常读取