First time FreeNAS

[iliak]

ZFS can take all the drives and map them into a single pool:
https://www.ixsystems.com/documentation/freenas/11.2/storage.html#pools
You said 'raid 5' which in ZFS terms would be RAIDz1. From your storage pool you can create datasets that are dedicated to various purposes.
https://www.ixsystems.com/documentation/freenas/11.2/storage.html#adding-datasets

The datasets can be can be separate shares with totally different properties.
https://www.ixsystems.com/documentation/freenas/11.2/sharing.html#sharing
The following is a fairly good guide for configuring the NAS, even though it was written for a previous version of the GUI, most of the information in the guide is still very useful and appropriate for configuring a new system.

Uncle Fester's Basic FreeNAS Configuration Guide
https://www.familybrown.org/dokuwiki/doku.php?id=fester:intro

The guide suggests doing a 'burn-in' test on the drives, but that is not needed with solid state drives. If you review the other links in the "Useful Links" button in my signature and the information in the guide, I think it will get you up and running. If you have any questions, please ask. It is better to ask than to have problems later.

Thanks. I will post here my updates as soon as i finish, ( or stuck on something ).

 

[iliak]

we might need to add a fast network temporary folder , no redundancy is needed at all (we will clean its content daily weekly),
does the freenass will work with extra pci nvme card one of:

• Intel P4500 Series NVMe Solid State Storage Cards (might be from another brand)
• nvme over pci with samsung pro 960 nvme (cost much less)

@Chris Moore