hdd won't recognized on ps3???

hey brothers


i just bought 250 western digital sata 2.5" hdd for ps3 but when i put it in ps3 and when i start the ps3 it won't recognized it


I replaced the Ps3's hard drive with the western digital when I turned it on it said "Connect the controller using a USB cable, and then press the PS button." I did, after I pressed the button this appeared on the screen. "The system software cannot be run correctly. press the PS button to try and reset the system. If the system cannot be restarted, the system partition of the hard disk must be reformatted and you must reinstall the system software. Insert storage media that contains update data of version 2.70 or later, and the press the START and SELECT buttons at the same time. For information on how to obtain the update data, refer to the SCE Web site for your region." I tried pressing the PS button to restart the system, but it brought me right back to this page.




so what to do totally confused


please ans asap