Recovery Services Vault Storage Replication Comparison

A Recovery Services vault is a centralized storage entity in Azure used to protect workloads like virtual machines, SQL databases, and on-premises assets. During vault creation, administrators must select a storage replication type to define how data is protected. This critical choice must align with the disaster recovery plan because the setting becomes locked and cannot be changed once backup items are protected. Administrators can choose from the following storage options:

• Locally-redundant storage (LRS) to provide a low-cost option within a single data center.
• Zone-redundant storage (ZRS) to replicate data across multiple availability zones in the same region.
• Geo-redundant storage (GRS) to replicate data to a secondary paired region for maximum protection.