Update disk-encryption-linux.md

Author: msmbaldwin

articles/virtual-machines/linux/disk-encryption-linux.md

@@ -235,7 +235,7 @@ Use the [az vm encryption enable](/cli/azure/vm/encryption#az-vm-encryption-enab
 -  **Encrypt a running VM using EncryptFormatAll:**
 
      ```azurecli-interactive
-     az vm encryption enable --resource-group "MyVirtualMachineResourceGroup" --name "MySecureVM" --disk-encryption-keyvault "MySecureVault" --encrypt-format-all
+     az vm encryption enable --resource-group "MyVirtualMachineResourceGroup" --name "MySecureVM" --disk-encryption-keyvault "MySecureVault" --volume-type "data" --encrypt-format-all
      ```
 
 ### Use the EncryptFormatAll parameter with a PowerShell cmdlet
@@ -252,7 +252,7 @@ $KeyVault = Get-AzKeyVault -VaultName $KeyVaultName -ResourceGroupName $KVRGname
 $diskEncryptionKeyVaultUrl = $KeyVault.VaultUri;
 $KeyVaultResourceId = $KeyVault.ResourceId;
 
-Set-AzVMDiskEncryptionExtension -ResourceGroupName $VMRGName -VMName $vmName -DiskEncryptionKeyVaultUrl $diskEncryptionKeyVaultUrl -DiskEncryptionKeyVaultId $KeyVaultResourceId -EncryptFormatAll
+Set-AzVMDiskEncryptionExtension -ResourceGroupName $VMRGName -VMName $vmName -DiskEncryptionKeyVaultUrl $diskEncryptionKeyVaultUrl -DiskEncryptionKeyVaultId $KeyVaultResourceId -VolumeType "data" -EncryptFormatAll
 ```