Western Digital WD Sentinel DX4000 8TB Small Office Storage Server

The RAID 5 build out-of-the box is going to be 6 or 7 days. 

Just FYI, We probably won’t recommend this product to customers because of that long rebuild time (and slow performance during the rebuild).

After the initial setup is completed the Sentinel delivers a great performance. Now if you need a product to be used out of the box, and cannot wait until the initial setup is completed, maybe is not the right product for you.