Which technology provides real-time data replication for mission-critical applications?

Disk-to-disk backup solutions are designed to enable real-time data replication, which is crucial for mission-critical applications. Unlike traditional backup methods such as tape backups, which often involve time-consuming processes and can lead to significant data loss between backup intervals, disk-to-disk solutions allow for immediate copying of data from one disk to another. This ensures that data is continuously updated and is available for immediate recovery in case of a failure.

In mission-critical environments where downtime can result in significant operational disruption or financial loss, the ability to have near-instantaneous access to up-to-date information is vital. Disk-to-disk replication technologies typically utilize various techniques such as snapshots or continuous data protection to keep data synchronized between primary and secondary storage, thus providing a robust solution for businesses needing high availability and resilience.

While other options may offer data storage or backup capabilities, they do not provide the same level of immediacy and efficiency in data replication necessary for mission-critical applications.