Disabling USB hard drive auto mount

Hi people (and others) I'm having a lot of trouble figuring out how to disable the auto mount function for usb hard drives. Every time I connect a HD via a usb HD dock. It auto mounts the drive. Is there anyway to stop this? I think it's udisksd or something. Google was useless regarding how to disable it. I'm asking PCLinuxOS people but I expect I'll get an answer here faster. Any help would be greatly appreciated. Kate