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Update how-to-managed-cluster-managed-disk.md
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articles/service-fabric/how-to-managed-cluster-managed-disk.md

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title: Select managed disk types for Service Fabric managed cluster nodes
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description: Learn how to select managed disk types for Service Fabric managed cluster nodes and configure in an ARM template.
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ms.topic: how-to
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ms.date: 5/10/2021
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ms.date: 11/19/2021
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---
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# Select managed disk types for Service Fabric managed cluster nodes
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Azure Service Fabric managed clusters use managed disks for all storage needs, including application data, for scenarios such as reliable collections and actors. Azure managed disks are block-level storage volumes that are managed by Azure and used with Azure Virtual Machines. Managed disks are like a physical disk in an on-premises server but, virtualized. With managed disks, all you have to do is specify the disk size, the disk type, and provision the disk. Once you provision the disk, Azure handles the rest. For more information about managed disks, see [Introduction to Azure managed disks
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](../virtual-machines/managed-disks-overview.md).
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>[!NOTE]
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> After node type deployment you cannot modify the managed disk type or size in place. Instead, you can easily deploy a new node type with with required configuration in your cluster and migrate your workloads.
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## Managed disk types
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Azure Service Fabric manged clusters support the following managed disk types:
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* Standard HDD
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* Standard HDD locally redundant storage. Best for backup, non-critical, and infrequent access.
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* Standard SSD *Default*
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* Standard SSD locally redundant storage. Best for web servers, lightly used enterprise applications and dev/test.
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* Premium SSD *Compatible with specific VM sizes* for more information see [Premium SSD](../virtual-machines/disks-types.md#premium-ssds)
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* Standard SSD locally redundant storage. Best for web servers, lightly used enterprise applications, and dev/test.
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* Premium SSD *Compatible with specific VM sizes* for more information, see [Premium SSD](../virtual-machines/disks-types.md#premium-ssds)
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* Premium SSD locally redundant storage. Best for production and performance sensitive workloads.
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>[!NOTE]
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> Any temp disk associated with VM Size will *not* be used for storing any Service Fabric or application related data
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## Specifying a Service Fabric managed cluster disk type
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To specify a Service Fabric managed cluster disk type you must include the following value in the managed cluster resource definition.
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To specify a Service Fabric managed cluster disk type, you must include the following value in the managed cluster resource definition.
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* The value **dataDiskType** property, which specifies what managed disk type to use for your nodes.
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Possible values are:
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* "Standard_LRS"
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* "StandardSSD_LRS"
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* "Premium_LRS"
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>[!NOTE]
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> Not all managed disk types are available for all vm sizes, for more info see [What disk types are available in Azure?](../virtual-machines/disks-types.md)
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