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CLarified SSE / temp disks
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includes/virtual-machines-managed-disks-overview.md

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@@ -52,6 +52,8 @@ Managed disks offer two different kinds of encryption. The first is Server Side
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[Azure Server-side Encryption](../articles/virtual-machines/windows/disk-encryption.md) provides encryption-at-rest and safeguards your data to meet your organizational security and compliance commitments. Server-side encryption is enabled by default for all managed disks, snapshots, and images in all the regions where managed disks are available. You can either allow Azure to manage your keys for you, these are platform-managed keys, or you can manage the keys yourself, these are customer-managed keys. Visit the [Managed Disks FAQ page](../articles/virtual-machines/windows/faq-for-disks.md#managed-disks-and-storage-service-encryption) for more details.
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Temporary disks are not managed disks, and are not encrypted by Storage Service Encryption. For more more details, see [Disk Roles: Temporary disk](#temporary-disk).
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### Azure Disk Encryption
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Azure Disk Encryption allows you to encrypt the OS and Data disks used by an IaaS Virtual Machine. This encryption includes managed disks. For Windows, the drives are encrypted using industry-standard BitLocker encryption technology. For Linux, the disks are encrypted using the DM-Crypt technology. The encryption process is integrated with Azure Key Vault to allow you to control and manage the disk encryption keys. For more information, see [Azure Disk Encryption for IaaS VMs](../articles/security/azure-security-disk-encryption-overview.md).
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### Temporary disk
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Every VM contains a temporary disk, which is not a managed disk. The temporary disk provides short-term storage for applications and processes and is intended to only store data such as page or swap files. Data on the temporary disk may be lost during a [maintenance event](../articles/virtual-machines/windows/manage-availability.md?toc=%2fazure%2fvirtual-machines%2fwindows%2ftoc.json#understand-vm-reboots---maintenance-vs-downtime) event or when you [redeploy a VM](../articles/virtual-machines/troubleshooting/redeploy-to-new-node-windows.md?toc=%2Fazure%2Fvirtual-machines%2Fwindows%2Ftoc.json). On Azure Linux VMs, the temporary disk is /dev/sdb by default and on Windows VMs the temporary disk is D: by default. During a successful standard reboot of the VM, the data on the temporary disk will persist.
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Every VM contains a temporary disk, which is not a managed disk. The temporary disk provides short-term storage for applications and processes and is intended to only store data such as page or swap files. Data on the temporary disk may be lost during a [maintenance event](../articles/virtual-machines/windows/manage-availability.md?toc=%2fazure%2fvirtual-machines%2fwindows%2ftoc.json#understand-vm-reboots---maintenance-vs-downtime) event or when you [redeploy a VM](../articles/virtual-machines/troubleshooting/redeploy-to-new-node-windows.md?toc=%2Fazure%2Fvirtual-machines%2Fwindows%2Ftoc.json). On Azure Linux VMs, the temporary disk is /dev/sdb by default and on Windows VMs the temporary disk is D: by default. During a successful standard reboot of the VM, the data on the temporary disk will persist.
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## Managed disk snapshots
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