HPE Support in Ukraine After End of Life

Synchronous Means Every Write Pays the Distance

A synchronous copy is one where the write is not acknowledged to the application until both sites hold it. That guarantee is exactly why it is chosen, and it means every single write carries the round-trip latency to the second site. Latency follows distance, and distance is bounded by physics rather than by equipment quality.

The Trade Cannot Be Engineered Away

A more distant second site survives a wider class of event and costs more write latency. A closer one is faster and shares more risk with the primary. There is no configuration that delivers both, and choosing where to sit on that line is a business judgement about what the estate must survive — not a technical problem awaiting a better product.

Asynchronous Is a Different Guarantee, Not a Worse One

Removing the latency cost means accepting that the second copy can be behind by some interval. For many estates that is the right answer. What matters is choosing it deliberately, because the alternative is an estate that believes it is synchronous and discovers during a failure how much recent data was in flight.

The Link Hardware Fails Silently

Losing the adapters or optics carrying replication does not stop the primary site. It stops the protection, quietly, while every application continues normally — which makes those inexpensive components the ones most worth holding. ICD supplies them alongside array and ProLiant components for generations past HPE end of support, tested and covered for one to three years. Enquiries here are handled case by case.