Create a managed disk from a snapshot with PowerShell

This script creates a managed disk from a snapshot. Use it to restore a virtual machine from snapshots of OS and data disks. Create OS and data managed disks from respective snapshots and then create a new virtual machine by attaching managed disks. You can also restore data disks of an existing VM by attaching data disks created from snapshots.

If you don't have an Azure subscription, create a free account before you begin.

Launch Azure Cloud Shell

The Azure Cloud Shell is a free shell that you can run directly within the Azure portal. It has common Azure tools preinstalled and configured to use with your account. Click the Cloud Shell button on the menu in the upper-right of the Azure portal.

Cloud Shell

The button launches an interactive shell that you can use to run all of the steps in this topic:

Screenshot showing the Cloud Shell window in the portal

If you choose to install and use the PowerShell locally, this tutorial requires that you are Azure PowerShell module version 4.0 or later. Run Get-Module -ListAvailable AzureRM to find the version. If you need to install or upgrade, see Install Azure PowerShell. If you are running PowerShell locally, you also need to run Login-AzureRmAccount to create a connection with Azure.

Sample script

#Provide the subscription Id
$subscriptionId = 'yourSubscriptionId'

#Provide the name of your resource group
$resourceGroupName ='yourResourceGroupName'

#Provide the name of the snapshot that will be used to create Managed Disks
$snapshotName = 'yourSnapshotName'

#Provide the name of the Managed Disk
$diskName = 'yourManagedDiskName'

#Provide the size of the disks in GB. It should be greater than the VHD file size.
$diskSize = '128'

#Provide the storage type for Managed Disk. PremiumLRS or StandardLRS.
$storageType = 'PremiumLRS'

#Provide the Azure region (e.g. westus) where Managed Disks will be located.
#This location should be same as the snapshot location
#Get all the Azure location using command below:
#Get-AzureRmLocation
$location = 'westus'

#Set the context to the subscription Id where Managed Disk will be created
Select-AzureRmSubscription -SubscriptionId $SubscriptionId

$snapshot = Get-AzureRmSnapshot -ResourceGroupName $resourceGroupName -SnapshotName $snapshotName 
 
$diskConfig = New-AzureRmDiskConfig -AccountType $storageType -Location $location -CreateOption Copy -SourceResourceId $snapshot.Id
 
New-AzureRmDisk -Disk $diskConfig -ResourceGroupName $resourceGroupName -DiskName $diskName
 

Script explanation

This script uses following commands to create a managed disk from a snapshot. Each command in the table links to command specific documentation.

Command Notes
Get-AzureRmSnapshot Gets snapshot properties.
New-AzureRmDiskConfig Creates disk configuration that is used for disk creation. It includes the resource Id of the parent snapshot, location that is same as the location of parent snapshot and the storage type.
New-AzureRmDisk Creates a disk using disk configuration, disk name, and resource group name passed as parameters.

Next steps

Create a virtual machine from a managed disk

For more information on the Azure PowerShell module, see Azure PowerShell documentation.

Additional virtual machine PowerShell script samples can be found in the Azure Windows VM documentation.