diff --git a/packages/jumpstarter-driver-tftp/jumpstarter_driver_tftp/server.py b/packages/jumpstarter-driver-tftp/jumpstarter_driver_tftp/server.py
index ffc8fd7f9..fbf9536fc 100644
--- a/packages/jumpstarter-driver-tftp/jumpstarter_driver_tftp/server.py
+++ b/packages/jumpstarter-driver-tftp/jumpstarter_driver_tftp/server.py
@@ -163,14 +163,13 @@ async def _handle_read_request(self, data: bytes, addr: Tuple[str, int]):
             if not self._validate_mode(mode, addr):
                 return
 
-            resolved_path = self._resolve_and_validate_path(filename, addr)
+            resolved_path = await self._resolve_and_validate_path(filename, addr)
             if not resolved_path:
                 return
 
             negotiated_options, blksize, timeout = self._negotiate_options(options)
             self.logger.info(f"Negotiated options: {negotiated_options}")
             await self._start_transfer(resolved_path, addr, blksize, timeout, negotiated_options)
-
         except Exception as e:
             self.logger.error(f"Error handling RRQ from {addr}: {e}")
             self._send_error(addr, TftpErrorCode.NOT_DEFINED, str(e))
@@ -230,17 +229,17 @@ def _validate_mode(self, mode: str, addr: Tuple[str, int]) -> bool:
             return False
         return True
 
-    def _resolve_and_validate_path(self, filename: str, addr: Tuple[str, int]) -> Optional[str]:
+    async def _resolve_and_validate_path(self, filename: str, addr: Tuple[str, int]) -> Optional[str]:
         try:
-            stat = self.server.operator.stat(filename)
+            stat = await self.server.operator.stat(filename)
         except FileNotFoundError:
             self.logger.error(f"File not found: {filename}")
             self._send_error(addr, TftpErrorCode.FILE_NOT_FOUND, "File not found")
             return None
 
         if not stat.mode.is_file():
-            self.logger.error(f"File not found: {filename}")
-            self._send_error(addr, TftpErrorCode.FILE_NOT_FOUND, "File not found")
+            self.logger.error(f"Not a file: {filename}")
+            self._send_error(addr, TftpErrorCode.FILE_NOT_FOUND, "Not a file")
             return None
 
         return filename
@@ -425,14 +424,22 @@ async def _initialize_transfer(self) -> bool:
         return True
 
     async def _perform_transfer(self):
-        async with await self.server.operator.to_async_operator().open(self.filepath, "rb") as f:
+        async with await self.server.operator.open(self.filepath, "rb") as f:
             while True:
                 if self.server.shutdown_event.is_set():
                     self.logger.info(f"Server shutdown detected, stopping transfer to {self.client_addr}")
                     break
 
-                data = await f.read(size=self.block_size)
-                if not await self._handle_data_block(data):
+                # read a full block or until EOF
+                data = bytearray()
+                while len(data) < self.block_size:
+                    chunk = await f.read(size=self.block_size - len(data))
+                    if not chunk:  # EOF reached
+                        break
+                    data.extend(chunk)
+
+                # send the data (converted to bytes)
+                if not await self._handle_data_block(bytes(data)):
                     break
 
     async def _handle_data_block(self, data: bytes) -> bool:
diff --git a/packages/jumpstarter-driver-tftp/jumpstarter_driver_tftp/server_test.py b/packages/jumpstarter-driver-tftp/jumpstarter_driver_tftp/server_test.py
index 6ff95daac..72bba485d 100644
--- a/packages/jumpstarter-driver-tftp/jumpstarter_driver_tftp/server_test.py
+++ b/packages/jumpstarter-driver-tftp/jumpstarter_driver_tftp/server_test.py
@@ -3,7 +3,7 @@
 from pathlib import Path
 
 import pytest
-from opendal import Operator
+from opendal import AsyncOperator
 
 from jumpstarter_driver_tftp.server import Opcode, TftpServer
 
@@ -14,7 +14,7 @@ async def tftp_server():
         test_file_path = Path(temp_dir) / "test.txt"
         test_file_path.write_text("Hello, TFTP!")
 
-        server = TftpServer(host="127.0.0.1", port=0, operator=Operator("fs", root=str(temp_dir)))
+        server = TftpServer(host="127.0.0.1", port=0, operator=AsyncOperator("fs", root=str(temp_dir)))
         server_task = asyncio.create_task(server.start())
 
         for _ in range(10):