Home > Storage > PowerFlex > White Papers > Dell APEX Block Storage for AWS: Microsoft SQL Server 2022 on Linux with Multi-AZ Resiliency > Logical architecture
The logical architecture that is described in this section shows the deployment of a three node SQL Server 2022 multi-subnet failover cluster with Pacemaker on Ubuntu 22.04 in a two-layer APEX Block Storage configuration. Where we have SQL Server 2022 Node1 in AZ-1a, SQL Server 2022 Node2 in AZ-1b, and SQL Server 2022 Node3 in AZ-1c. SQL Server Setup classifies this configuration as a multi-subnet cluster. The advantage of an APEX Block Storage deployment across three AZs is its increased resiliency and availability.