Update data protection options article

Added information on on-disk data protection features.

Author: netapp-manishc

articles/azure-netapp-files/data-protection-disaster-recovery-options.md

@@ -5,14 +5,18 @@ services: azure-netapp-files
 author: b-ahibbard
 ms.service: azure-netapp-files
 ms.topic: concept-article
-ms.date: 05/12/2025
+ms.date: 08/28/2025
 ms.author: anfdocs
 # Customer intent: "As a data administrator, I want to assess the data protection and disaster recovery options available in Azure NetApp Files, so that I can choose the most effective solutions to ensure data integrity and availability for my organization's needs."
 ---
 # Understand data protection and disaster recovery options in Azure NetApp Files
 
 Learn about the different data protection and disaster recovery features in Azure NetApp Files and understand what solutions best serve your needs.  
 
+## On-Disk Data Protection
+
+Azure NetApp Files Flexible, Standard, Premium and Ultra service levels are built on a [fault-tolerant bare-metal fleet powered by ONTAP®](https://learn.microsoft.com/en-us/azure/azure-netapp-files/azure-netapp-files-introduction#simplicity-and-availability), delivering enterprise-grade resilience, and uses RAID-DP® (Double Parity RAID) to safeguard data against disk failures. This mechanism distributes parity across multiple disks, enabling seamless data recovery even if two disks fail simultaneously. RAID-DP has a long-standing presence in the enterprise storage industry and is recognized for its proven reliability and fault tolerance.
+
 ## Snapshots 
 
 The foundation of data protection solutions including volume restores and clones and cross-region replication, Azure NetApp Files snapshot technology delivers stability, scalability, and swift recoverability without impacting performance.