Even if it fit, don't use it. The drive is not designed for laptops, so you could give yourself a head-crash on this HDD, where the same force on a disk designed for laptops won't do anything other than retract the heads for a few secs and pause I/O.
Go to the seagate website, and look for the momentus family of LAPTOP disk drives. They will tolerate the G-forces you get with laptops.