Thanks for your reply Eric.
Speed is fairly important. Some transcoding is done over the network but this will be changing soon to be done locally. Everything is working fine at the moment. We just need to add a lot more space.
The current setup is a Mac Pro 5.1 (file server) & Axus Y3-12S6ES6-D 22tb raid.
New Mac’s have lost the ability to use sas (apart from using a thunderbolt/sas converter from sonnet which isnt something i really want to use). This is why i’d like to move away from using sas.
A solution is to keep the current sas raid to house our originals video files on (15tb) and move the rest to a Mac mini file server (since there’s only one thunderbolt & Ethernet port i wont be able to use a lag- it might be possible to use thunderbolt hub though).
Another solution is to buy another sas raid, but this is become redundant once the server is upgraded.
Ben