I upgraded my Macbook's HD to a WD2500BEVS last year. Yesterday, I noticed in Disk Utility that my HD was in red with a warning that my HD's SMART monitor was reporting an imminent failure. Up to then, I had had no inkling that anything was wrong. No read/seek errors or slowdowns, no clicks. Nada. I immediately backed up all my data and checked again. Still the same imminent failure report. Checked with Tech Tool Pro. Same thing. Drew a deep breath and rebooted. No problems or delays on restarting. Same warning. Checked on the internet. Seems to be lots of SMART failures with this particular disk. Time to send it back. My disk was within warranty, so I got an RMA from WD UK. I would have to send my disk back to them at my expense within 30 days of receipt of the replacement or I get stung for twice its market value ($198 - ). Later today, I check again. The SMART status has changed to normal. Check again with TT4. Passes all disk tests with flying colours. Huh? Now I know it is best to err on the side of caution, so I am not looking for replies with "back your data up, dude and send it back" for that is what I have done. Does anyone have experience of this warning of disaster and dire combustion and yet find his/her disk working regardless? In other words, are WD's prone to giving false positives on the SMART warnings? I might end up having to send back my disk time after time if that is the case.