Dell Latitude D505 Hard disk

Hi all! Hope you can help me! I am trying to find out what kind of hard disk I would need to replace my current one. The last time I went to the shop they asked me whether my notebook is SATA or PATA. I have no clue! I’m new to this laptop game and just told them the make of the laptop and they just had no clue!! Is it PATA or SATA??? Help!! Thanks! The Laptop is Dell Latitude D505