text: new 7200rpm 60gb harddrive for hp ze5170 laptop? ok, i'm trying to upgrade the hd from a 40gb 4200rpm to a 60gb 7200rpm, laptop wont recognize the new hd, hp chat says that only 4200rpm are supported, is this true? i have no experience with laptops, but on my desktop speed  doesn't matter.  thanks i have never heard of that, but if they say so then it must be.  laptops are usually very proprietary and cannot be upgraded much.