For what it's worth, I have a DL380p Gen8 (3 of them), all fitted with 16 300GB drives (8 on the internal 420i, 8 more on an add-on 420 controller... lack of a SAS expander for the gen8 really chafes me!)
On just one of them, one of the 8 drives on the internal controller (built in drive backplane) always throws an error on bootup, saying it's "Degraded - Not Authenticated". This is a genuine HP drive mind you... new drive on a new server.
I got them to ship a new drive thinking it was just a defective unit, but the new drive reports the same thing. So then I started swapping that drive with working ones on my other 2 systems just to see, and turns out it's not the drive that's the problem.
For an unrelated error on this same system (bad DIMM slot), I replaced the motherboard and I thought maybe that would fix this other issue too, like the 420i controller was flaky. But no. It appears to be an issue with that backplane board itself...
This is in a remote colocation (other side of the country), so now I have to schedule a replacement backplane board on my next site visit in a few months...not the kind of server surgery I'm going to ask the remote-hands folks to tackle. And hope that fixes it.
Point being, it seems this "genuine HP drive" thing is a big old pain even with genuine HP drives. The drive works fine, it just helpfully warns me that LED's won't do their full magic or whatever, and now I've got my Insight Manager bugging with with a yellow warning.