I am not from Intel and I doubt that this will end up helping (there has been another similar report Re: SSD not recognized by NUC5i5RYH BIOS), but just in case: I assume that your drive seems to insert into the slot properly and that the screw hole lines up for you to remove the screw which was pre-inserted into the motherboard and re-insert through the drive back into the motherboard. And are you able to verify that the cables between motherboard and 2.5" SATA daughtercard are not somehow causing undesired pressure on the M.2 card when closing the NUC case back together?
Thanks for the quick reply dougho -- they're definitely valid questions. I also saw the other post -- that seems to be for a regular 2.5" SATA version of my problem, where as my issue is with the M.2 only, and with two separate manufacturers.
So far as I can tell, the M.2 stick fits perfectly -- into the slot, screw hole aligns and fixes correctly. I don't think there is undue pressure, and I have also tried briefly with the bottom cover detached (so no pressure whatsoever).
I'd really appreciate hearing the opinions of people on this board as to whether my assumption is reasonable -- that it's likely a mainboard hardware issue with the M.2 interface. It's still relatively easy for me to return the unit at the moment, however I don't want to do that if I made any obvious mistakes (anyone have anything to say about the M.2 cards I used?)
It might not be mainboard but rather still M.2 SSD; here is another thread that had trouble with Samsung EVO M.2 which they solved by switching to an Intel M.2
Hmm, seems the messages regarding the Samsung EVO M.2 cards are mixed then, thanks for the link.
I had chat with Intel support today and the representative indeed suggested exchanging the NUC, given the experience described in my first post (although no idea how much insight he had into the issue; but he did respond to my NUC support request). I'm getting the new one tomorrow, so I'll be able to comment further then.
I have to say though, if the new NUC has the same issue, I'm very surprised and disappointed with the NUC's M.2 compatibility. Both of the cards I tried are from mainstream frequently-available manufacturers, and the specific cards noted on the compatibility inlay (found after unboxing the NUC) are not easily available from most resellers of the NUC kits.
All shall be revealed tomorrow!
As a side note, the following post reports success in using the EVO 850 M.2: Re: Will the new Samsung M.2 500GB work in the new NUC5i5RYH, NUC5i5RYK and NUC5i7RYH "Samsung 850EVO 500GB M.2 SSD MZ-N5E500BW" ?
I received the replacement NUC5i5RYH today -- the problem is now 'resolved' -- i.e. likely a faulty mainboard on the original.
For the reference of others, I can now confirm that both of the SATA M.2 SSD sticks that I tried are in fact compatible with the NUC5i5RYH (at least the unit I have):
ADATA Premier Pro SP900 M.2 256 GB SSD (22x80 M-key, SATA)
Samsung 850 EVO, 250 GB SSD (22x80 M-key, SATA)
It is good to hear it is working fine now for you.