I'm going to install FAS252 with 4 SSDs and 20 SAS in the base and 24 SAS in the external shelf. As I understand it the ADP is done only on the disks in the base. I want to create only one data aggregate for each node. I see as a good idea not to mix data partiotions from the base and the disks from the shelf. So I would like to create data aggregate for the first node only from the data partitions from the base and the data aggregate for the second node from the disks from the external shelf.
My question is if it is a good idea or if there could be any issues. Is there any better recommendation for this setup?
I have setup multiple systems as you have described and it has worked well. You can also create a storage pool with the SSD and split them between the two aggregates. Unless you have a specific workload that you need to design against that is the route that i would go.