Hi,
Yesterday i was using defraggler from piriform to do a defrag, and i suddenly got a disk health: bad, and checked smart, and all was 0, all smart attributes was with error and bad, temperature was 0º (Of course incorrect) a new disk with about 1 year and half, then i canceled the defrag and only have done a chkdsk (Just chkdsk) on restart, then it took too much time, but at this time when i opened defraggler, and i checked the disk health: good, also all smart attributes was right.
It was a bug?
I think so because i was running norton 360 scheduled malware search and defraggler simultaneously.
Then i put the wd diagnostic tool running, and done a quick test and extended test and i got all tests ok and passed.
Well, i let you 7 screenshots and please analyze this and say me if all is ok, and if all smart attributes are there and ok or is someone attribute missing, or i should take it to warranty. Was this information helpful? | 
Based on your post, the drive looks fine, I'd like to know:
Are you able to use the drive as normal?
Is there any other issue with the drive?
How is the transfer speed?
If all tests are fine and you are not getting any issue during your usage, you cannot claim warranty for the drive. On the other hand, if you hard drive is creating issues, you may post the specific errors.
In any case make sure you make an extra copy of your data.
Hope it helps.