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.
WD Diagnost tool: