Htykuut

I am developing a script to copy data disks from one Azure VM to another Azure VM. Below is the task:

1. Create SNAPSHOTS of existing data disks from source VM


2. Create new DATADISKS from the SNAPSHOTS created from step 1


3. Attach the new DATADISKS to the destination VM

I have written the complete code. However Step 3 is throwing an error.

## Create Snapshot from a Managed Disk ##



$resourceGroupName = 'manju_copy_disk' 

$location = 'east us 2' 

$source_vm_name = 'server1'

$destination_vm_name = 'server3'



$source_vm_object = get-azurermvm -ResourceGroupName $resourceGroupName -Name $source_vm_name



$data_disk_list = Get-AzureRmDisk | where {$_.ManagedBy -match $source_vm_name -and $_.OsType -eq $null}



$snapshot_list = New-Object System.Collections.ArrayList($null)



foreach($data_disk_list_iterator in $data_disk_list){



    $snapshotName = $destination_vm_name + "_Snapshot_" + $data_disk_list_iterator.Name



    $snapshot_config = New-AzureRmSnapshotConfig -SourceUri $data_disk_list_iterator.id -Location $location -CreateOption copy



    $snapshot_object = New-AzureRmSnapshot -Snapshot $snapshot_config -SnapshotName $snapshotName -ResourceGroupName $resourceGroupName



    $snapshot_list.Add($snapshot_object.Id)



}





## Create Managed disk from snap shot created above ##

$storageType = 'StandardLRS'





$count=0



$destination_datadisk_list = New-Object System.Collections.ArrayList($null)

#$destination_datadisk_Name_list = New-Object System.Collections.ArrayList($null)



foreach($snapshot_list_iterator in $snapshot_list){





    $disk_name = $destination_vm_name + "_datadisk_" + $count

    $count += 1



    $diskConfig = New-AzureRmDiskConfig -AccountType $storageType -Location $location -CreateOption Copy -SourceResourceId $snapshot_list_iterator



    $datadisk_object = New-AzureRmDisk -Disk $diskConfig -ResourceGroupName $resourceGroupName -DiskName $disk_name



    $destination_datadisk_ID_list.Add($datadisk_object.Id)



}







## Attach Managed disk to destination vm



$destination_vm_object = Get-AzureRmVM -Name $destination_vm_name -ResourceGroupName $resourceGroupName 



$lun_count = 1



foreach($destination_datadisk_list_iterator in $destination_datadisk_list){

    $destination_datadisk_name = $destination_vm_name + "_datadisk_"+$lun_count

    $destination_vm_object = Add-AzureRmVMDataDisk -VM $destination_vm_object -Name $destination_datadisk_name -CreateOption Attach -ManagedDiskId $destination_datadisk_list_iterator -Lun $lun_count

    $lun_count += 1

}



Update-AzureRmVM -VM $destination_vm_object -ResourceGroupName $resourceGroupName  ## --> LINE CODE NOT WORKING

Below is the error:

Update-AzureRmVM : Changing property 'dataDisk.name' is not allowed.

ErrorCode: PropertyChangeNotAllowed

ErrorMessage: Changing property 'dataDisk.name' is not allowed.

StatusCode: 409

ReasonPhrase: Conflict

OperationID : e8a0a8de-0cdd-4ba0-90bc-883d37e374af

At line:1 char:1

+ Update-AzureRmVM -VM $destination_vm_object -ResourceGroupName $resou ...

+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

    + CategoryInfo          : CloseError: (:) [Update-AzureRmVM], ComputeCloudException

    + FullyQualifiedErrorId : Microsoft.Azure.Commands.Compute.UpdateAzureVMCommand

When you attach the data disks which you create from the snapshot, you can not change the name again. Take a look at this.

So I suggest you can create the data disk from the snapshot and attach them to the destination VM in the same foreach loop with the same names.