I had a WD Scorpio blue 640 GB HD inside my laptop but windows started having problems so I took hardrive out of PC and put in external enclosure and did a quick format. Drive seemed to work at this point again ok as a simple volume but to make sure I ran data lifeguard tool I downloaded from WD site. This drive fails quick test and when I tried extended test that took about 5 hrs, bad sectors were detected and I clicked repair but error was detected while preparing bad sectors resulting in extended test fail. Is their another utility or test I should run? Should I have done a more thorough format before running Western digital lifeguard utility or is it time to contact WD for RMA?