Merge pull request #236307 from MGoedtel/bug87296

Clarify storage tier for CSI Disk StorageClass

Author: prmerger-automator[bot]

articles/aks/azure-disk-csi.md

@@ -1,13 +1,13 @@
 ---
-title: Use Container Storage Interface (CSI) driver for Azure Disks on Azure Kubernetes Service (AKS)
-description: Learn how to use the Container Storage Interface (CSI) driver for Azure Disks in an Azure Kubernetes Service (AKS) cluster.
+title: Use Container Storage Interface (CSI) driver for Azure Disk on Azure Kubernetes Service (AKS)
+description: Learn how to use the Container Storage Interface (CSI) driver for Azure Disk in an Azure Kubernetes Service (AKS) cluster.
 ms.topic: article
 ms.date: 04/19/2023
 ---
 
-# Use the Azure Disks Container Storage Interface (CSI) driver in Azure Kubernetes Service (AKS)
+# Use the Azure Disk Container Storage Interface (CSI) driver in Azure Kubernetes Service (AKS)
 
-The Azure Disks Container Storage Interface (CSI) driver is a [CSI specification](https://github.com/container-storage-interface/spec/blob/master/spec.md)-compliant driver used by Azure Kubernetes Service (AKS) to manage the lifecycle of Azure Disks.
+The Azure Disks Container Storage Interface (CSI) driver is a [CSI specification](https://github.com/container-storage-interface/spec/blob/master/spec.md)-compliant driver used by Azure Kubernetes Service (AKS) to manage the lifecycle of Azure Disk.
 
 The CSI is a standard for exposing arbitrary block and file storage systems to containerized workloads on Kubernetes. By adopting and using CSI, AKS now can write, deploy, and iterate plug-ins to expose new or improve existing storage systems in Kubernetes. Using CSI drivers in AKS avoids having to touch the core Kubernetes code and wait for its release cycles.
 

articles/aks/operator-best-practices-storage.md

@@ -3,7 +3,7 @@ title: Best practices for storage and backup
 titleSuffix: Azure Kubernetes Service
 description: Learn the cluster operator best practices for storage, data encryption, and backups in Azure Kubernetes Service (AKS)
 ms.topic: conceptual
-ms.date: 11/30/2022
+ms.date: 04/28/2023
 
 ---
 
@@ -22,7 +22,7 @@ This best practices article focuses on storage considerations for cluster operat
 ## Choose the appropriate storage type
 
 > **Best practice guidance**
-> 
+>
 > Understand the needs of your application to pick the right storage. Use high performance, SSD-backed storage for production workloads. Plan for network-based storage when you need multiple concurrent connections.
 
 Applications often require different types and speeds of storage. Determine the most appropriate storage type by asking the following questions.
@@ -51,6 +51,8 @@ Both Azure Files and Azure Disks are available in Standard and Premium performan
     - Backed by regular spinning disks (HDDs).
     - Good for archival or infrequently accessed data.
 
+While the default storage tier for the Azure Disk CSI driver is Premium SSD, your custom StorageClass can use Premium SSD, Standard SSD, or Standard HDD.
+
 Understand the application performance needs and access patterns to choose the appropriate storage tier. For more information about Managed Disks sizes and performance tiers, see [Azure Managed Disks overview][managed-disks]. 
 
 ### Create and use storage classes to define application needs
@@ -89,8 +91,6 @@ Work with your application development team to understand their storage capacity
 
 For more information about available VM sizes, see [Sizes for Linux virtual machines in Azure][vm-sizes].
 
-
-
 ## Dynamically provision volumes
 
 > **Best practice guidance**