Microsoft Azure Administrator (AZ104) Practice Exam

Which type of Azure storage account could be converted to zone-redundant storage through live migration?

1. Premium storage with GRS replication

2. Standard storage with LRS replication

3. Premium storage with RA-GRS replication

4. Standard storage with LRS replication and Hot access tier

The correct answer is: Standard storage with LRS replication

Zone-redundant storage (ZRS) is designed to provide high availability by replicating your data across multiple availability zones within a region. For Azure storage accounts, the ability to perform live migration and conversion to zone-redundant storage is contingent upon the type of replication the account uses. Standard storage accounts with locally redundant storage (LRS) replication provide a single-region replication that is cost-effective and ensures data is replicated three times within a data center. However, converting from LRS to zone-redundant storage through live migration is supported, as LRS is seen as a baseline storage option that can readily be adapted to a higher redundancy such as ZRS. On the other hand, premium storage accounts, which are optimized for high-performance workloads, often have specific replication mechanisms (such as GRS or RA-GRS) that do not support live migration to ZRS. These are typically geared towards different applications and workloads that might not require the flexibility offered by standard storage accounts. Thus, a standard storage account with LRS replication is the right option for being able to convert to zone-redundant storage through live migration, making it the most suitable choice among the options provided.