WD1600AAJS 0.0gb

Are people seeing problems with the caviar drives? I’ve seen multpile failures where the drive seems to fail and reports a size of 0.0gb in the bios. Is this a controller failure? The systems seem to run fine. Then upon reboot they failure reporting size of 0.0gb. I have seen the probem on the Blue and black units. Any ideas on how I can attemp to get the data back of the drive or reset the controller. I have tried HDD capacity but no luck. Thanks