I put my father's HDD (Barracuda 7200.12 500Gb) into my Windows 7 desktop and try to boot. But received BIOS message "SMART status bad, backup and replace message". Seems like the HDD is died.

OK, I disabled SMART check in BIOS and boot my Windows successfully. However I do not see the HDD nor in the Windows Explorer, nor in the Disk Management.
But If I tried to boot from the HDD (accidentally), the father's Windows XP started to boot.
So, seems like the HDD is not dead.

Could anyone help me to access the HDD in order to backup data?
Thanks very much.