Merge pull request #275880 from roygara/minUp

Clarifying disk roles

Author: prmerger-automator[bot]

articles/virtual-machines/disks-high-availability.md

@@ -3,7 +3,7 @@ title: Best practices for high availability with Azure VMs and managed disks
 description: Learn the steps you can take to get the best availability with your Azure virtual machines and managed disks.
 author: roygara
 ms.author: rogarana
-ms.date: 05/10/2024
+ms.date: 05/21/2024
 ms.topic: conceptual
 ms.service: azure-disk-storage
 ---
@@ -16,7 +16,7 @@ Azure offers several configuration options for ensuring high availability of Azu
 
 |Configuration  |Recommendation  |Benefits  |
 |---------|---------|---------|
-|[Applications running on a single VM](#recommendations-for-applications-running-on-a-single-vm)     |[Use Ultra Disks, Premium SSD v2, and Premium SSD disks](#use-ultra-disks-premium-ssd-v2-or-premium-ssd).         |Single VMs using only Ultra Disks, Premium SSD v2, or Premium SSD disks have the highest uptime service level agreement (SLA), and these disk types offer the best performance.         |
+|[Applications running on a single VM](#recommendations-for-applications-running-on-a-single-vm)     |[Use Ultra Disks, Premium SSD v2, and Premium SSD disks](#use-ultra-disks-premium-ssd-v2-or-premium-ssd).         |Single VMs using only Premium SSD disks as the OS disks, and either Ultra Disks, Premium SSD v2, or Premium SSD disks as data disks have the highest uptime service level agreement (SLA), and these disk types offer the best performance.         |
 |     |[Use zone-redundant storage (ZRS) disks](#use-zone-redundant-storage-disks).         |Access to your data even if an entire zone experiences an outage.         |
 |[Applications running on multiple VMs](#recommendations-for-applications-running-on-multiple-vms)    |Distribute VMs and disks across multiple availability zones using a [zone redundant Virtual Machine Scale Set with flexible orchestration mode](#use-zone-redundant-virtual-machine-scale-sets-with-flexible-orchestration) or by deploying VMs and disks across [three availability zones](#deploy-vms-and-disks-across-three-availability-zones).        |Multiple VMs have the highest uptime SLA when deployed across multiple zones.         |
 |     |Deploy VMs and disks across multiple fault domains with either [regional Virtual Machine Scale Sets with flexible orchestration mode](#use-regional-virtual-machine-scale-sets-with-flexible-orchestration) or [availability sets](#use-availability-sets).         |Multiple VMs have the second highest uptime SLA when deployed across fault domains.         |
@@ -41,7 +41,7 @@ Legacy applications, traditional web servers, line-of-business applications, dev
 
 ### Use Ultra Disks, Premium SSD v2, or Premium SSD
 
-Single VMs using only [Ultra Disks](disks-types.md#ultra-disks), [Premium SSD v2](disks-types.md#premium-ssd-v2), or [Premium SSD disks](disks-types.md#premium-ssds) have the [highest single VM uptime SLA](https://www.microsoft.com/licensing/docs/view/Service-Level-Agreements-SLA-for-Online-Services?lang=1), and these disk types offer the best performance.
+Single VMs using only [Premium SSD disks](disks-types.md#premium-ssds) as the OS disk, and either [Ultra Disks](disks-types.md#ultra-disks), [Premium SSD v2](disks-types.md#premium-ssd-v2), or [Premium SSD disks](disks-types.md#premium-ssds) as data disks have the [highest single VM uptime SLA](https://www.microsoft.com/licensing/docs/view/Service-Level-Agreements-SLA-for-Online-Services?lang=1), and these disk types offer the best performance.
 
 ### Use zone-redundant storage disks