No – doesnt matter which order you do that  As long as you have space in the pool can just add it to an existing file system or create a new one Internal volume manager will figure out how to distribute the data
We have an array with 16TB of total storage and during our initial setup, the EMC technician created a 10TB NFS Export for use in our UCS/VMWare environment. This will store all of our Virtual Machines. Well, as some may know, ESXi hosts in a cluster now complain when there are not 2 datastore heart beats for HA. I want to create a new NFS Export mainly to solve this issue, but also to house the ISO images we might need to use in our Virtual Environment. If I create a new NFS Export using some of the available space, will this keep me from being able to expand our first NFS export later? I would not be using the other 6TB for this small, new export, probably a few 100 GB.
NFS Export Expansion