Create a Fusion Drive with an SSD Partition

Ah, so its just create the partitions, then use diskutil with Identifier 1 for the SSD partition and Identifier 2 for the HDD partition, CreateVolume and job done. Thanks!

Well I am quite sure, I would just like one Apple expert to confirm it and perhaps remind us of the process of how to do it, as its not standard, you have to do some particular method to get the software to use an SSD partition, as AFAIK the default is to use the full SSD, although with the HHD part, having only a partition of it is not a problem.

I'm sure it is. I remember seeing it on here, on this same Apple support forum. It was being discussed how to do it. I understand that its not standard form but you can do it.