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HD connect not detecting IDE
What make and model hdd are you using. Maybe your drive is incompatible with hdloader. Some drives were marked incompatible becuase they didn't fit without modification into the full size ps2, however some just don't work. Also make sure you have the jumper on the hdd set to master. If it is set to master and it's not working try removing the jumper completly. For some reason some hdd's (like Western Digital I believe) need the jumper removed.