largest hdd you can install?

I want to buy a new secodary drive my 750gb is running out of space, whats the largest I could install in the alienware 17?

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Nevermind contacted dell, the alienware 17 hdd capacity limit is 2TB.

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now if someone could find a 2TB 2.5inc that would fit....i'd love you.

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I found the M9T http://www.storagereview.com/samsung_spinpoint_m9t_mobile_hard_drive_m3_and_p3_portable_now_shipping in case anyone else was looking.