From: Savageduck <savageduck1@{REMOVESPAM}me.com>
Subject: Re: Cheap SD Cards
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Date: Sat, 18 Nov 2017 18:15:34 -0800
From: Savageduck <savageduck1@{REMOVESPAM}me.com>
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Subject: Re: Cheap SD Cards
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On Nov 18, 2017, Bill W wrote
(in article<v7o11ddvkisativkcpgvoas63jfvhu9rnt@4ax.com>):

> On Sat, 18 Nov 2017 16:31:39 -0800, Savageduck
> <savageduck1@{REMOVESPAM}me.com>  wrote:
>
> > On Nov 18, 2017, Eric Stevens wrote
> > (in article<7gh11dl03564uqbn4j3mr1i1umlovu2nn8@4ax.com>):
> >
> > > On Sun, 19 Nov 2017 10:57:11 +1300, Eric Stevens
> > ><eric.stevens@sum.co.nz>  wrote:
> >
> > <<Snip>>
> >
> > > > Does this throw any light on the card requirements?
> > > > https://www.dropbox.com/s/6a9lvyuhcy5970r/D800%20Cards.jpg?dl=0
> > >
> > > Is a UHS-II card a "Type II card" which the manual says "cannot be
> > > used"?
> >
> > Yup!
>
> I don't think so. UHS cards are much faster than earlier cards with
> "Class" ratings. And "Type 2" refers only to CF cards.
>
> https://havecamerawilltravel.com/photographer/uhs-i-vs-uhs-ii-sd-mic...
> /

Much of that is true. However, there are times that the camera manufacturers 
can screw things up for the user. I have been fortunate in that I haven’t 
pushed things with my D300S keeping the UDMA CF, and moderately speced SD 
cards.

With my Fujifilm X-T2 I have two UHS-II SD slots, and I use 300MB/s UHS-II in 
that exclusively. I shoot RAW+Fine JPEG writing RAF to card #1, and JPEG to 
card #2.

I have used the UHS-II cards in my X-E2 which is a UHS-I camera, and I have 
not experienced any issues. So for that camera, at least, the bacjkward 
compatibility does work.
>
> > So now we know, the problem was, Peter was using a card which the D800
> > couldn't support. This time he actually had too much card for the camera.
> >
> > There is nothing wrong with the card, and he should be able to use it in his
> > D500. That will handle UHS-II cards.
>
> UHS2 is backwards compatible with UHS1, but there can be issues in
> card readers that aren't set up for 2, just like Peter was told. I
> still wouldn't be surprised if the problem arose from multiple
> exposures, and some possibility that the backward compatibility
> induced problems. There are more contacts on UHS2 cards, and contact
> placement in the camera might be an issue. If I were Peter, I might
> stick with UHS1.

All, or much of your argument is valid, and I believe your final conclusion 
is correct, that Peter should stick with UHS-I in his D800. This is a classic 
case of the support requirements of the camera being misunderstood, not 
known,or ignored, or backward compatibility of the UHS-II not valid with the 
D800.

-- 

Regards,
Savageduck