The Sentinel is a “special bird” :) The software is Windows Storage Server 2008 R2 Essentials and is an OEM Embeded product. (Why we never could get the software from Newegg for example) As such I was told it would be supported till 2023 or 2024, I forget which. Though I actually have no clue what level of support that means.
We keep pushing Microsoft for a “workgroup” product like the DX has or the Home Server was, but they do not listen. The DS series software costs about 8 times as much as the DX
But your hard drives have what a 5 year life span? It will be time to upgrade when support gives out.
