Resilience in a data centre comes from redundancy at every layer that matters to your business — not just the layer that's easiest to specify on a datasheet.
Power and cooling redundancy get the most attention because they're visible, but storage and backup architecture decide whether an incident is a minor interruption or a genuine crisis. A hyperconverged platform without a tested, verified backup process isn't resilient — it's just consolidated risk.
Recovery objectives should be defined before architecture, not after. Knowing your actual recovery time and recovery point objectives changes which backup topology and replication strategy make sense, and how much they cost to achieve.
Resilience also means documentation. A data centre that only one engineer understands is fragile no matter how much redundant hardware sits in the rack. Runbooks, as-built diagrams and tested failover procedures are part of the design, not paperwork to produce afterward.
