finish copy files follow bytes sort

files_utils/public.py

@@ -0,0 +1,37 @@
+def ReadDiskBytes(volume_letter: str, start_byte: int, length: int) -> bytes:
+    """
+    从指定磁盘的指定起始位置读取指定长度的字节。
+
+    :param volume_letter: 盘符（如 "Y"）
+    :param start_byte: 起始字节位置（整数）
+    :param length: 要读取的字节数（整数）
+    :return: 读取到的原始字节数据（bytes）
+    """
+    if not isinstance(volume_letter, str) or len(volume_letter.strip()) != 1:
+        raise ValueError("drive_letter 必须是单个字母，如 'Y'")
+
+    # 构建 Windows 设备路径格式：\\.\Y:
+    disk_path = f"\\\\.\\{volume_letter.strip().upper()}:"
+
+    try:
+        with open(disk_path, "rb") as disk:
+            disk.seek(start_byte)
+            data = disk.read(length)
+            return data
+    except PermissionError:
+        raise PermissionError("权限不足，请以管理员身份运行程序")
+    except Exception as e:
+        raise RuntimeError(f"读取磁盘失败：{e}")
+
+
+if __name__ == "__main__":
+    drive = "Y"
+    start = 687685632
+    size = 7163904
+
+    try:
+        content = ReadDiskBytes(drive, start, size)
+        print(f"成功读取 {len(content)} 字节内容。前100字节为：")
+        print(content[:100])
+    except Exception as e:
+        print("错误：", e)