I'm getting a hard drive, but not sure if it is compatible with my motherboard. My computer is Emachines H2642, the hard drive I'm replacing is WDC WD400EB-11CPF0, and the hard drive I'm getting is Maxtor Diamondmax 160G SATA. How do I know if the hard drive works with the computer? Also, the hard drive I'm getting is used, how do I know whether it's corrupted or not? After getting the hard drive, how do I transfer the data on my old hard drive to the new one? Do I need to reinstall the system?