Swap Disk for Azure VM

$resourceGroupName = 'rg-OMS'
$location = 'eastus2'
$vmName = 'x007'
$snapshotName = 'snapX007disk' 

$diskAccountType='Premium_LRS'
$osDiskName = 'newX007fromSnapshot'

$vm = get-azurermvm  -ResourceGroupName $resourceGroupName   -Name $vmName

$snapshot =  New-AzureRmSnapshotConfig   -SourceUri $vm.StorageProfile.OsDisk.ManagedDisk.Id   -Location $location   -CreateOption copy -SkuName $diskAccountType

# create a snapshot
New-AzureRmSnapshot -Snapshot $snapshot -SnapshotName $snapshotName -ResourceGroupName $resourceGroupName


$snapshot = Get-AzureRmSnapshot -ResourceGroupName $resourceGroupName -SnapshotName $snapshotName

$diskConfig = New-AzureRmDiskConfig -Location $snapshot.Location -SourceResourceId $snapshot.Id -CreateOption Copy -SkuName $diskAccountType

$disk = New-AzureRmDisk -Disk $diskConfig -ResourceGroupName $resourceGroupName -DiskName $osDiskName



# list all disks
Get-AzureRmDisk -ResourceGroupName $ResourceGroupName | Format-Table -Property Name

# Get the VM
$vm = Get-AzureRmVM -ResourceGroupName $resourceGroupName -Name $vmName

# Make sure the VM is stopped\deallocated
Stop-AzureRmVM -ResourceGroupName $resourceGroupName -Name $vm.Name -Force

# Get the new disk that you want to swap in
$disk = Get-AzureRmDisk -ResourceGroupName $resourceGroupName -Name $osDiskName

# Set the VM configuration to point to the new disk 
Set-AzureRmVMOSDisk -VM $vm -ManagedDiskId $disk.Id -Name $disk.Name

# Update the VM with the new OS disk
Update-AzureRmVM -ResourceGroupName $resourceGroupName -VM $vm

# Start the VM
Start-AzureRmVM -Name $vm.Name -ResourceGroupName $resourceGroupName