Just based on what I was told by a NetApp sales rep. Very glad to hear that this is a supported configuration. It had been explained to me ~6-8 months ago that all-ssd aggregates were only supported by AFF systems, which would not support hybrid or spinning disk shelves, and that if one needed an all-ssd aggregate (flash-cache\pool not sufficient) , adding an AFF HA pair to a cluster was the only way to go

On Tue, Mar 28, 2017 at 6:37 PM, John Stoffel <john@stoffel.org> wrote:

>>>>> "Mike" == Mike Gossett <cmgossett@gmail.com> writes:

Mike> I don't know if it really makes it any more or less simple. If
Mike> you are going to end up with a long term SAS disk footprint,
Mike> then if it were me, i'd rather be using those SAS disks for my
Mike> root than SSDs. Sounds like you're going to have at least
Mike> 20x900G SAS disks in your end-state configuration, so you might
Mike> want to evaluate buying another some more SAS disk to hold
Mike> that.

Mike> I haven't looked at the latest changes, but historically you had
Mike> the choice of AFF or flash-pool \ hybrid aggregates. Are you
Mike> sure that you are going to be able to have an all-flash shelf on
Mike> the same system as hybrid \ spinning-disk shelves? As of 6
Mike> months ago, this didn't fly. *

I don't know why you think so. I've been running an 8060 four node
cluster with a shelf of SSDs with most of them in an aggregate, along
with a couple or three disks (I forget) were setup in a FlashPool.
But since we also had FlashCache, it was explained to us that they
didn't really work like we thought/wanted, so we just nuked the
FlashPools and added the disks back into the SSD aggregate.

John