diff --git a/notebooks/LPD/LPD_Correct_Fast.ipynb b/notebooks/LPD/LPD_Correct_Fast.ipynb
index 66674c09b7059a8a615cdb0c3032e80804b86a2c..1675599008ff28a025e60cbe19a2cd9e72070834 100644
--- a/notebooks/LPD/LPD_Correct_Fast.ipynb
+++ b/notebooks/LPD/LPD_Correct_Fast.ipynb
@@ -55,7 +55,7 @@
     "\n",
     "# Output options\n",
     "overwrite = True  # set to True if existing data should be overwritten\n",
-    "chunks_data = 32  # HDF chunk size for pixel data in number of frames.\n",
+    "chunks_data = 1  # HDF chunk size for pixel data in number of frames.\n",
     "chunks_ids = 32  # HDF chunk size for cellId and pulseId datasets.\n",
     "create_virtual_cxi_in = ''  # Folder to create virtual CXI files in (for each job's chunk)\n",
     "\n",