For a SAP HANA scale-out configuration that includes a standby node, a shared file system is required for /hana/shared, /hana/data, and /hana/log to ensure all nodes (including the standby) can access the data volumes in the event of a failover. Azure NetApp Files (ANF) is the recommended high-performance storage solution that supports the necessary NFS protocols and provides the low-latency, high-throughput requirements mandated by SAP HANA's Key Performance Indicators (KPIs) for scale-out architectures on Azure. While Azure shared disks are viable for some clusters, ANF is the primary recommendation for production HANA scale-out deployments involving standby nodes due to its native NFS support and performance tiering.

Microsoft Learn: SAP HANA Azure virtual machine storage configurations - Section: "SAP HANA scale-out with standby node using Azure NetApp Files on Red Hat Enterprise Linux."

SAP Note 1900823: SAP HANA Storage Connector API - Details requirements for shared storage in scale-out scenarios.

Microsoft Learn: Azure NetApp Files for SAP HANA - Documentation on performance limits and architectural requirements for /hana/data and /hana/log in scale-out.

SAP Certified Solutions Portal: Certified and Supported SAP HANA Hardware - Listing Azure NetApp Files as a certified enterprise storage solution for HANA scale-out.