Are you claiming here it is normal that one out of every 10 WD hard disks sold are defective by the time they reach the customer? That's a very bold and frankly ridiculous sounding claim.
Well, let's see, I bought 4 x Toshiba 5TB HDDs from Amazon.
Within 3 months, 2 of them had failed (not completely dead, but reporting a high number of unrecoverable sectors). I probably just hit a bad batch.
So yes, if somebody unlike me took the time to thoroughly burn-in their drives, they might well return 1 out of 10 within the 30-day period.
Just blatantly dismissing another post, without providing any evidence of your own at all is just a bit douchey. At least suggest your own experiences, or even better, point to some sources or statistics to back up your point.
The above is my own experiences - but as noted, I may have just hit a bad batch.
For the avoidance of doubt, I count as infant mortality when a new hard drive would drop from a hardware RAID array during initial construction of the array (we are talking about NAS drives). Not just "the drive will not start".
I ordered 4 a few months back and 3 were DOA. (I suspect the shitty way they were packages was to blame). WD replaced them all & the new ones have been fine ever since, but either way, i could easily believe those failure rates from my experience.
Fortunatly they were WD red's so they sorted them all out without hassle & the new drives have been fine ever since.
The last time I checked, as shipped by Amazon in the US without any care in packing as reported in feedback, I'd expect that or a higher defective rate for any manufacturer.
Been a few years since I've bought any, but with any luck Newegg is still packing them well.
As covercash commented, this is pretty much in line with the blackblaze statistics, and also when you buy a hard drive on amazon, whether from amazon or from the market place, the chance that the HD has been damaged in transit is much higher than if the drive came directly to the datacenter from the manufacturer.
Even if the average is lower than that, it wouldn't be surprising for any particular buyer to have above-average DOA rates. After all some buyers have below-average rates.