-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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