Convert Premium SSD to Standard HDD in Azure

Powershell script to convert Premium SSD disk to standard HDD 


# Name of the resource group that contains the VM
$rgName = 'MYResourceGroupName'

# Name of the your virtual machine
$vmName = 'MyVirtualMachineName'

# Choose between Standard_LRS and Premium_LRS based on your scenario
$storageType = 'Standard_LRS'

# Premium capable size
# Required only if converting storage from Standard to Premium
#$size = 'Standard_DS2_v2'


#Provide the subscription Id where Managed Disks will be created
$subscriptionId = 'd7x2bxx8-62xe-4xdx-xa8x-20x0x3x2x5xx'

Select-AzSubscription -SubscriptionId $SubscriptionId



# Stop and deallocate the VM before changing the size
Stop-AzVM -ResourceGroupName $rgName -Name $vmName -Force

$vm = Get-AzVM -Name $vmName -resourceGroupName $rgName

# Change the VM size to a size that supports Premium storage
# Skip this step if converting storage from Premium to Standard
#$vm.HardwareProfile.VmSize = $size
#Update-AzVM -VM $vm -ResourceGroupName $rgName

# Get all disks in the resource group of the VM
$vmDisks = Get-AzDisk -ResourceGroupName $rgName 

# For disks that belong to the selected VM, convert to Premium storage
foreach ($disk in $vmDisks)
{
if ($disk.ManagedBy -eq $vm.Id)
{
$diskUpdateConfig = New-AzDiskUpdateConfig –AccountType $storageType
Update-AzDisk -DiskUpdate $diskUpdateConfig -ResourceGroupName $rgName `
-DiskName $disk.Name
}
}

Start-AzVM -ResourceGroupName $rgName -Name $vmName