should brand new drive have 'power on hours' = zero?
 

If a drive were tested before being stuffed in a retail box, that would
be at least an hour per terabyte.
So is POH reset by manufacturer?

should brand new drive have 'power on hours' = zero?
 

wrote

If a drive were tested before being stuffed in a retail
box, that would be at least an hour per terabyte.

Doesn’t happen.

So is POH reset by manufacturer?

No need.