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Update faq.yml and storage concepts
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articles/azure-vmware/concepts-storage.md

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@@ -4,7 +4,7 @@ description: Learn about storage capacity, storage policies, fault tolerance, an
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ms.topic: conceptual
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ms.custom: contperf-fy21q4
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ms.service: azure-vmware
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ms.date: 08/09/2022
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ms.date: 12/08/2022
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---
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# Azure VMware Solution storage concepts
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## vSAN clusters
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Local storage in each cluster host is claimed as part of a vSAN datastore. All diskgroups use an NVMe cache tier of 1.6 TB with the raw, per host, SSD-based capacity of 15.4 TB. The size of the raw capacity tier of a cluster is the per host capacity times the number of hosts. For example, a four host cluster provides 61.6-TB raw capacity in the vSAN capacity tier.
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Local storage in each cluster host is claimed as part of a vSAN datastore. For the AV36 SKU, all diskgroups use an NVMe cache tier of 1.6 TB with the raw, per host, SSD-based capacity of 15.4 TB. The size of the raw capacity tier of a cluster is the per host capacity times the number of hosts. For example, a four host cluster provides 61.6-TB raw capacity in the vSAN capacity tier. Check the hardware specification for the [AV36P and AV52 SKU](introduction.md) storage device details.
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Local storage in cluster hosts is used in the cluster-wide vSAN datastore. All datastores are created as part of private cloud deployment and are available for use immediately. The **cloudadmin** user and all users assigned to the CloudAdmin role can manage datastores with these vSAN privileges:
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- Datastore.UpdateVirtualMachineMetadata
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>[!IMPORTANT]
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>You can't change the name of datastores or clusters. You can select a cluster name other than "Cluster-n" where n > 1 when provisioning from somewhere other than the portal (AzureCLI or PowerShell).
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>You can't change the name of datastores or clusters. Azure CLI and PowerShell support changing the name of the resource clusters (Cluster-2 to Cluster-12), however this should not be used, because it creates a meta-data mismatch between the Azure portal resource cluster name and the vSphere cluster name.
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## Storage policies and fault tolerance
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The default storage policy is set to RAID-1 (Mirroring) FTT-1, with Object Space Reservation set to Thin provisioning. Unless you adjust the storage policy or apply a new policy, the cluster grows with this configuration. This is the policy that will be applied to the workload VMs. To set a different storage policy, see [Configure storage policy](configure-storage-policy.md).
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The default storage policy is set to **RAID-1 FTT-1**, with Object Space Reservation set to Thin provisioning. Unless you adjust the storage policy or apply a new policy, the cluster grows with this configuration. This is the policy that will be applied to the workload VMs. To set a different storage policy, see [Configure storage policy](configure-storage-policy.md).
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In a three-host cluster, FTT-1 accommodates a single host's failure. Microsoft governs failures regularly and replaces the hardware when events are detected from an operations perspective.
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> [!NOTE]
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> When you log on to the vSphere Client, you may notice a VM Storage Policy called **vSAN Default Storage Policy** with **Object Space Reservation** set to **Thick** provisioning. Please note that this is not the default storage policy applied to the cluster. This policy exists for historical purposes and will eventually be modified to **Thin** provisioning.
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>[!NOTE]
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>When you log on to the vSphere Client, you may notice a VM Storage Policy called **vSAN Default Storage Policy** with **Object Space Reservation** set to **Thick** provisioning. Please note that this is not the default storage policy applied to the cluster. This policy exists for historical purposes and will eventually be modified to **Thin** provisioning.
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> [!NOTE]
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> All of the software-defined data center (SDDC) management VMs (vCenter, NSX manager, NSX controller, NSX edges, and others) use the **Microsoft vSAN Management Storage Policy**, with **Object Space Reservation** set to **Thick** provisioning.
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>[!NOTE]
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>All of the software-defined data center (SDDC) management VMs (vCenter Server, NSX-T Manager, NSX-T Data Center Edges, and others) use the **Microsoft vSAN Management Storage Policy**, with **Object Space Reservation** set to **Thick** provisioning.
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>[!TIP]
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>If you're unsure if the cluster will grow to four or more, then deploy using the default policy. If you're sure your cluster will grow, then instead of expanding the cluster after your initial deployment, we recommend deploying the extra hosts during deployment. As the VMs are deployed to the cluster, change the disk's storage policy in the VM settings to either RAID-5 FTT-1 or RAID-6 FTT-2. In reference to [SLA for Azure VMware Solution](https://azure.microsoft.com/support/legal/sla/azure-vmware/v1_1/), note that more than 6 hosts should be configured in the cluster to use an FTT-2 policy (RAID-1, or RAID-6). Also note that the storage policy is not automatically updated based on cluster size. Similarly, changing the default does not automatically update the running VM policies.
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## Datastore capacity expansion options
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The vSAN datastore capacity can be expanded by connecting Azure storage resources such as [Azure NetApp Files volumes as datastores](./attach-azure-netapp-files-to-azure-vmware-solution-hosts.md). Virtual machines can be migrated between vSAN and Azure NetApp Files datastores using storage vMotion.
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The existing cluster vSAN storage capacity can be expanded by connecting Azure storage resources such as [Azure NetApp Files volumes as additional datastores](./attach-azure-netapp-files-to-azure-vmware-solution-hosts.md). Virtual machines can be migrated between vSAN and Azure NetApp Files datastores using storage vMotion.
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Azure NetApp Files is available in [Ultra, Premium and Standard performance tiers](../azure-netapp-files/azure-netapp-files-service-levels.md) to allow for adjusting performance and cost to the requirements of the workloads.
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## Azure storage integration
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<!-- LINKS - internal -->
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[tutorial-scale-private-cloud]: ./tutorial-scale-private-cloud.md
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[concepts-identity]: ./concepts-identity.md
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[concepts-identity]: ./concepts-identity.md

articles/azure-vmware/faq.yml

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ms.topic: faq
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ms.date: 09/29/2021
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ms.date: 12/08/2022
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title: Common questions about Azure VMware Solution
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summary: This article answers commonly asked questions about Azure VMware Solution.
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answer: For general questions on pricing, see the Azure VMware Solution [pricing](https://azure.microsoft.com/pricing/details/azure-vmware) page.
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- question: Is VMware HCX Enterprise available, and if so, how much does it cost?
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answer: VMware HCX Enterprise is availble on Azure Vmware Solution at no additional cost. If you plan to use VMware HCX Enterprise, make sure you've enabled the VMware HCX Enterprise add-on through a [support request](https://rc.portal.azure.com/#create/Microsoft.Support).
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answer: VMware HCX Enterprise is available on Azure Vmware Solution at no additional cost. If you plan to use VMware HCX Enterprise, make sure you've enabled the VMware HCX Enterprise add-on through a [support request](https://rc.portal.azure.com/#create/Microsoft.Support).
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- question: Will traffic between on-premises and Azure VMware Solution over ExpressRoute incur any outbound data transfer charge in the metered data plan?
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answer: |
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- question: Do private clouds use VMware NSX Data Center? If so, which version is supported?
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Yes, NSX-T Data Center is the only supported version of NSX Data Center.
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Yes, NSX-T Data Center is the only supported version of VMware network virtualization software.
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NSX-T [!INCLUDE [nsxt-version](includes/nsxt-version.md)] is used for the software-defined networking in Azure VMware Solution private clouds.
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answer: The Sentinel Management tab provides you access to download the Sentinel software. It appears in the HCX Interconnect interface when an HCX Enterprise license is activated, and you have deployed a service mesh with a Sentinel Gateway (SGW) and Sentinel Data Receiver (SDR) pair deployed. Also, in traditional on-premises to cloud deployments, the Sentinel tab is only visible in the Connector, not cloud manager.
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- question: If we migrate a VM created with thick provisioning on the on-premises side to Azure VMware Solution, will the VM remain thick?
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answer: You can specify the type of format you want when you migrate a VM to Azure VMware Solution. However, vSAN is primarily the datastore you will use in Azure VMware Solution, so it depends on the storage policy that's selected. The datastore default storage policy is the *vSAN default storage policy*, which is thick provisioned; however, the other storage policy options are thin. You can use Run commands to change the default datastore storage policy.
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answer: You can specify the type of format you want when you migrate a VM to Azure VMware Solution. However, vSAN is primarily the datastore you will use in Azure VMware Solution, so it depends on the storage policy that's selected. The datastore default storage policy is the RAID-1 FTT-1, which is thin provisioned. You can use Run commands to change the default datastore storage policy.
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- question: What are the CPU specifications in each type of host?
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answer: The servers have dual 18 core 2.3 GHz Intel CPUs.
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answer: The AV36 SKU servers have dual 18 core 2.3 GHz Intel CPUs, AV36P SKU servers have dual 18 core 2.6 GHz Intel CPUs and AV52 SKU servers have dual 26 core 2.7 GHz Intel CPUs.
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answer: The servers have 576 GB of RAM.
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answer: The AV36 SKU servers have 576 GB of RAM, AV36P SKU servers have 768 GB of RAM and AV52 SKU servers have 1,536 GB of RAM.
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- question: Does Azure VMware Solution support running ESXi as a nested virtualization solution?
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> [!NOTE]
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> A T0 gateway is created and configured as part of a private cloud deployment.
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> Any modification to that logical router or the NSX-T Data Center edge node VMs could affect connectivity to your private cloud.
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> Any modification to that logical router or the NSX-T Data Center edge node VMs could affect connectivity to your private cloud and should be avoided.
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- question: Do I need to restrict access from the internet to VMs on logical networks in a private cloud?
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answer: No. Network traffic inbound from the internet directly to private clouds isn't allowed by default. However, you're able to expose Azure VMware Solution VMs to the internet through the [Public IP](./enable-public-ip-nsx-edge.md) option in your Azure portal for your Azure VMware Solution private cloud.
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answer: Microsoft provides alerts when capacity consumption exceeds 75%. Alternatively, you can also monitor capacity consumption metrics that are integrated into Azure Monitor.
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- question: How many 1.6-TB NVMe drives make up the disk groups to provide the 15.4 TB of raw SSD storage per host?
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answer: The [AV36 SKU](https://azure.microsoft.com/pricing/details/azure-vmware/) includes 2 1.6 TB NVMe Cache and 8 1.9TB raw storage capacity. These are then split into two disk groups.
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answer: The [AV36 SKU](https://azure.microsoft.com/pricing/details/azure-vmware/) includes two 1.6 TB NVMe Cache and eight 1.9TB raw storage capacity. These are then split into two disk groups. Check the AV36P and AV52 SKUs for their [hardware specifications](introduction.md).
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You'll have full administrator privileges on NSX-T Data Center and can manage vSphere role-based access control as you would with NSX-T Data Center on-premises. For more information, see [Access and Identity Concepts](concepts-identity.md).
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You'll have CloudAdmin role privileges. For more information, see [Access and identity Concepts](concepts-identity.md).
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> [!NOTE]
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> A T0 gateway is created and configured as part of a private cloud deployment. Any modification to that logical router or the NSX-T Data Center edge node VMs could affect connectivity to your private cloud.
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> A T0 gateway is created and configured as part of a private cloud deployment. Any modification to that logical router or the NSX-T Data Center edge node VMs could affect connectivity to your private cloud and should be avoided.
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- question: How can I change my credentials?
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answer: For information on resetting your credentials, see [Rotate the cloudadmin credentials for Azure VMware Solution](rotate-cloudadmin-credentials.md).

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