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articles/storage/files/files-smb-protocol.md

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title: SMB file shares in Azure Files
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description: Learn about file shares hosted in Azure Files using the Server Message Block (SMB) protocol, including features, security, and SMB Multichannel for premium file shares.
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description: Learn about file shares hosted in Azure Files using the Server Message Block (SMB) protocol, including features, security, and SMB Multichannel.
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author: khdownie
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ms.service: azure-file-storage
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ms.topic: conceptual
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This article covers SMB Azure file shares. For information about NFS Azure file shares, see [NFS Azure file shares](files-nfs-protocol.md).
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## Applies to
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| Management model | Billing model | Media tier | Redundancy | SMB | NFS |
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|-|-|-|-|:-:|:-:|
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| Microsoft.Storage | Provisioned v2 | HDD (standard) | Local (LRS) | ![Yes](../media/icons/yes-icon.png) | ![No](../media/icons/no-icon.png) |
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| Microsoft.Storage | Provisioned v2 | HDD (standard) | Zone (ZRS) | ![Yes](../media/icons/yes-icon.png) | ![No](../media/icons/no-icon.png) |
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| Microsoft.Storage | Provisioned v2 | HDD (standard) | Geo (GRS) | ![Yes](../media/icons/yes-icon.png) | ![No](../media/icons/no-icon.png) |
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| Microsoft.Storage | Provisioned v2 | HDD (standard) | GeoZone (GZRS) | ![Yes](../media/icons/yes-icon.png) | ![No](../media/icons/no-icon.png) |
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| Microsoft.Storage | Provisioned v1 | SSD (premium) | Local (LRS) | ![Yes](../media/icons/yes-icon.png) | ![Yes](../media/icons/yes-icon.png) |
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| Microsoft.Storage | Provisioned v1 | SSD (premium) | Zone (ZRS) | ![Yes](../media/icons/yes-icon.png) | ![Yes](../media/icons/yes-icon.png) |
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| Microsoft.Storage | Pay-as-you-go | HDD (standard) | Local (LRS) | ![Yes](../media/icons/yes-icon.png) | ![No](../media/icons/no-icon.png) |
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| Microsoft.Storage | Pay-as-you-go | HDD (standard) | Zone (ZRS) | ![Yes](../media/icons/yes-icon.png) | ![No](../media/icons/no-icon.png) |
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| Microsoft.Storage | Pay-as-you-go | HDD (standard) | Geo (GRS) | ![Yes](../media/icons/yes-icon.png) | ![No](../media/icons/no-icon.png) |
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| Microsoft.Storage | Pay-as-you-go | HDD (standard) | GeoZone (GZRS) | ![Yes](../media/icons/yes-icon.png) | ![No](../media/icons/no-icon.png) |
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## Common scenarios
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SMB file shares are used for a variety of applications including end-user file shares and file shares that back databases and applications. SMB file shares are often used in the following scenarios:
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- AD domain join and discretionary access control lists (DACLs).
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- Integrated serverless backup with Azure Backup.
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- Network isolation with Azure private endpoints.
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- High network throughput using SMB Multichannel (premium file shares only).
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- High network throughput using SMB Multichannel (SSD file shares only).
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- SMB channel encryption including AES-256-GCM, AES-128-GCM, and AES-128-CCM.
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- Previous version support through VSS integrated share snapshots.
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- Automatic soft delete on Azure file shares to prevent accidental deletes.
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### SMB Multichannel
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SMB Multichannel enables an SMB 3.x client to establish multiple network connections to an SMB file share. Azure Files supports SMB Multichannel on premium file shares (file shares in the FileStorage storage account kind). There is no additional cost for enabling SMB Multichannel in Azure Files. SMB Multichannel is now enabled by default in all Azure regions.
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SMB Multichannel enables an SMB 3.x client to establish multiple network connections to an SMB file share. Azure Files supports SMB Multichannel on SSD file shares. There is no additional cost for enabling SMB Multichannel in Azure Files. SMB Multichannel is now enabled by default in all Azure regions.
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# [Portal](#tab/azure-portal)
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To view the status of SMB Multichannel, navigate to the storage account containing your premium file shares and select **File shares** under the **Data storage** heading in the storage account table of contents. You should see the status of SMB Multichannel under the **File share settings** section. If you don't see it, make sure your storage account is of the FileStorage account kind.
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To view the status of SMB Multichannel, navigate to the storage account containing your SSD file shares and select **File shares** under the **Data storage** heading in the storage account table of contents. You should see the status of SMB Multichannel under the **File share settings** section. If you don't see it, make sure your storage account is of the FileStorage account kind.
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:::image type="content" source="media/files-smb-protocol/smb-multichannel-enabled.png" alt-text="A screenshot of the file shares section within the storage account highlighting the SMB Multichannel setting." lightbox="media/files-smb-protocol/smb-multichannel-enabled.png":::
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## Regional availability
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SMB Azure file shares are available in every Azure region, including all public and sovereign regions. Premium SMB file shares are available in [a subset of regions](https://azure.microsoft.com/global-infrastructure/services/?products=storage).
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SMB Azure file shares are available in every Azure region, including all public and sovereign regions. SSD file shares are available in [a subset of regions](https://azure.microsoft.com/global-infrastructure/services/?products=storage).
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## Next steps
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