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articles/sap/workloads/high-availability-guide-suse-nfs.md

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ms.service: sap-on-azure
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ms.subservice: sap-vm-workloads
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ms.topic: article
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ms.date: 06/19/2024
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ms.date: 03/07/2026
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ms.author: radeltch
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## Set up a highly available NFS server
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Use the following steps to deploy and configure a highly available NFS infrastructure for SAP workloads on SLES. Complete each subsection in order, because later steps depend on resources created in earlier steps.
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### Deploy Linux manually via Azure portal
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This document assumes that you've already deployed a resource group, [Azure Virtual Network](../../virtual-network/virtual-networks-overview.md), and subnet.
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### Configure Cluster Framework
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After you complete the DRBD and NFS base configuration, add Pacemaker resources for each SAP system and define the required ordering and colocation constraints.
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1. **[1]** Add the NFS drbd devices for SAP system NW1 to the cluster configuration
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> [!IMPORTANT]

articles/sap/workloads/sap-ascs-ha-multi-sid-wsfc-file-share.md

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articles/sap/workloads/sap-high-availability-guide-wsfc-shared-disk.md

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- Use [Azure shared disks](/azure/virtual-machines/disks-shared) to attach Azure managed disks to multiple VMs simultaneously.
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- Use [SIOS DataKeeper Cluster Edition](https://us.sios.com/products/sios-datakeeper/) to create a mirrored storage that simulates cluster shared storage.
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When you're selecting the technology for shared disks, keep in mind the following considerations about Azure shared disks for SAP workloads:
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When you select a technology for shared disks, keep in mind the following considerations about Azure shared disks for SAP workloads:
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- Use of Azure shared disks with [Azure Premium SSD](/azure/virtual-machines/disks-types#premium-ssds) disks is supported for SAP deployment in availability sets and availability zones.
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- [Azure Ultra Disk Storage disks](/azure/virtual-machines/disks-types#ultra-disks) and [Azure Standard SSD disks](/azure/virtual-machines/disks-types#standard-ssds) are not supported as Azure shared disks for SAP workloads.
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#### Prerequisites and limitations
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Currently, you can use Azure Premium SSD disks as Azure shared disks for the SAP ASCS/SCS instance. The following limitations are currently in place:
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You can use Azure Premium SSD disks as Azure shared disks for the SAP ASCS/SCS instance. Consider the following limitations:
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- [Azure Ultra Disk Storage disks](/azure/virtual-machines/disks-types#ultra-disks) and [Standard SSD disks](/azure/virtual-machines/disks-types#standard-ssds) are not supported as Azure shared disks for SAP workloads.
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- [Azure Shared disks](/azure/virtual-machines/disks-shared) with [Premium SSD disks](/azure/virtual-machines/disks-types#premium-ssds) are supported for SAP deployment in availability sets and availability zones.
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- If you're using PPGs for an SAP system deployed in a region, all virtual machines that share a disk must be part of the same PPG.
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- If you're using PPGs for an SAP system deployed across zones, as described in [Proximity placement groups with zonal deployments](proximity-placement-scenarios.md#proximity-placement-groups-with-zonal-deployments), you can attach `Premium_ZRS` storage to virtual machines that share a disk.
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For more information, review the [Limitations](/azure/virtual-machines/disks-shared#limitations) section of the documentation for Azure shared disks.
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For more information, see the [Limitations](/azure/virtual-machines/disks-shared#limitations) section of the documentation for Azure shared disks.
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#### Important considerations for Premium SSD shared disks
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articles/sap/workloads/sap-high-availability-infrastructure-wsfc-file-share.md

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# Customer intent: As a cloud architect, I want to prepare Azure infrastructure for SAP high availability using Windows failover clustering and file shares, so that I can ensure robust performance and reliability for SAP ASCS/SCS instances.

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