I have a maxtor 500gb sata hdd and it was working fine until one day i was un rar'ing a 8gb file and it just froze. i restarted my computer and now windows doesn't seem to recognize it anymore. it says the drive isn't formatted and asks me to format it. i used a program named testdrive and it shows all my stuff is still in there so i don't want to format it. any help?