diff --git a/src/gausskernel/storage/smgr/segment/data_file.cpp b/src/gausskernel/storage/smgr/segment/data_file.cpp
index a64f31a4c..4d88ed328 100644
--- a/src/gausskernel/storage/smgr/segment/data_file.cpp
+++ b/src/gausskernel/storage/smgr/segment/data_file.cpp
@@ -239,7 +239,7 @@ SegPhysicalFile df_get_physical_file(SegLogicFile *sf, int sliceno, BlockNumber
     SegmentCheck(sliceno < sf->file_num);
     if (ENABLE_DMS && sf->segfiles[sliceno].fd <= 0) {
         char *filename = slice_filename(sf->filename, sliceno);
-        sf->segfiles[sliceno].fd = dv_open_file(filename, O_RDONLY | PG_BINARY, SEGMENT_FILE_MODE);
+        sf->segfiles[sliceno].fd = dv_open_file(filename, O_RDWR | PG_BINARY, SEGMENT_FILE_MODE);
         pfree(filename);
     }