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**Applies to:**:heavy_check_mark: Linux VMs :heavy_check_mark: Windows
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There are five disk types of Azure managed disks: Azure Ultra Disks, Premium SSD v2, premium SSD, Standard SSD, and Standard HDD. You can easily switch between Premium SSD, Standard SSD, and Standard HDD based on your performance needs. Premium SSD and Standard SSD are also available with [Zone-redundant storage](disks-redundancy.md#zone-redundant-storage-for-managed-disks). For most cases, you can't yet switch from or to an Ultra Disk or a Premium SSD v2, you must deploy a new one with a snapshot of an existing disk. However, you can signup for a preview and then you can switch from existing disks to a Premium SSD v2. See [Migrate to Premium SSD v2 or Ultra Disk](#migrate-to-premium-ssd-v2-or-ultra-disk) for details.
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There are five disk types of Azure managed disks: Azure Ultra Disks, Premium SSD v2, premium SSD, Standard SSD, and Standard HDD. You can easily switch between Premium SSD, Standard SSD, and Standard HDD based on your performance needs. Premium SSD and Standard SSD are also available with [Zone-redundant storage](disks-redundancy.md#zone-redundant-storage-for-managed-disks). For most cases, you can't yet switch from or to an Ultra Disk or a Premium SSD v2, you must deploy a new one with a snapshot of an existing disk. However, you can signup for a preview and then you can switch from existing disks to a Premium SSD v2. See [Migrate to Premium SSD v2 or Ultra Disk using snapshots](#migrate-to-premium-ssd-v2-or-ultra-disk-using-snapshots) for details.
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This functionality isn't supported for unmanaged disks. But you can easily convert an unmanaged disk to a managed disk with [CLI](linux/convert-unmanaged-to-managed-disks.md) or [PowerShell](windows/convert-unmanaged-to-managed-disks.md) to be able to switch between disk types.
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- You can only change disk type twice per day.
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- You can only change the disk type of managed disks. If your disk is unmanaged, convert it to a managed disk with [CLI](linux/convert-unmanaged-to-managed-disks.md) or [PowerShell](windows/convert-unmanaged-to-managed-disks.md) to switch between disk types.
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## Premium SSD v2 migration (preview)
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## Convert Premium SSD v2 disks (preview)
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As a public preview, you can switch existing disks to Premium SSD v2 disks the same way you do for other disk types. Use [this survey](https://aka.ms/SeamlessMigrationCustomerSurvey) to sign up for the preview. Premium SSD v2 disks have some limitations, see the [Premium SSD v2 limitations](disks-deploy-premium-v2.md#limitations) section of their article to learn more.
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The preview allowing direct switching to Premium SSD v2 disks has some additional limitations and regional restrictions:
@@ -39,8 +39,8 @@ The preview allowing direct switching to Premium SSD v2 disks has some additiona
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- If your existing disk is using host caching, you must set it to none before changing to Premium SSD v2.
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- If your existing disk is using bursting, you must disable it before changing to Premium SSD v2.
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- If your existing disk is using double encryption, you must switch to one of the single encryption options before changing to Premium SSD v2.
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- You can't directly switch from a Premium SSD v2 to another disk type. If you want to change a Premium SSD v2 to another disk type, you must migrate using [snapshots](#migrate-to-premium-ssd-v2-or-ultra-disk).
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- You can't directly switch from Ultra Disks to Premium SSD v2 disks, you must migrate using [snapshots](#migrate-to-premium-ssd-v2-or-ultra-disk).
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- You can't directly switch from a Premium SSD v2 to another disk type. If you want to change a Premium SSD v2 to another disk type, you must migrate using [snapshots](#migrate-to-premium-ssd-v2-or-ultra-disk-using-snapshots).
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- You can't directly switch from Ultra Disks to Premium SSD v2 disks, you must migrate using [snapshots](#migrate-to-premium-ssd-v2-or-ultra-disk-using-snapshots).
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- If you're using the rest API, you must use an API version `2020-12-01` or newer for both the Compute Resource Provider and the Disk Resource Provider.
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This preview is currently only available in the following regions:
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## Migrate to Premium SSD v2 or Ultra Disk
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## Migrate to Premium SSD v2 or Ultra Disk using snapshots
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@@ -4,9 +4,9 @@ description: include file
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author: roygara
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ms.service: azure-disk-storage
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ms.topic: include
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ms.date: 07/15/2024
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ms.date: 07/24/2024
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ms.author: rogarana
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ms.custom: include file
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---
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> [!NOTE]
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> As a public preview, you can change the type of an existing disk to a Premium SSD v2 disk the same way you'd for other disk types. To sign up for the preview see [Premium SSD v2 migration (preview)](#premium-ssd-v2-migration-preview).
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> As a public preview, you can change the type of an existing disk to a Premium SSD v2 disk the same way you'd for other disk types. To sign up for the preview see [Premium SSD v2 migration (preview)](#convert-premium-ssd-v2-disks-preview).
Copy file name to clipboardExpand all lines: includes/managed-disks-ultra-disks-GA-scope-and-limitations.md
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@@ -15,7 +15,7 @@ The following list contains Ultra Disk's limitations:
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- Currently, Ultra Disks only support Single VM and Availability zone infrastructure options.
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- Ultra Disks don't support availability sets.
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- The size of an Ultra Disk can't be expanded without either deallocating the VM or detaching the Ultra Disk.
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- Existing disks currently can't change their type to an Ultra Disk. They must be [migrated](../articles/virtual-machines/disks-convert-types.md#migrate-to-premium-ssd-v2-or-ultra-disk).
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- Existing disks currently can't change their type to an Ultra Disk. They must be [migrated](../articles/virtual-machines/disks-convert-types.md#migrate-to-premium-ssd-v2-or-ultra-disk-using-snapshots).
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- Currently, Azure Government and Azure China don't support [customer-managed keys](../articles/virtual-machines/disk-encryption.md#customer-managed-keys) for Ultra disks.
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- Azure Disk Encryption isn't supported for VMs with Ultra Disks. Instead, you should use encryption at rest with platform-managed or customer-managed keys.
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- Azure Site Recovery isn't supported for VMs with Ultra Disks.
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