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Azure VM Selective Disk Backup


Hey Folks





Recently Microsoft has announched that, Azure now supports VM Selective backups.





What is this selective backup??. This will allow the admins/customers to backup only the selected disks in a VM to Azure backup. But at the moment we can only perform the following scnearios





Example





We have a Linux VM which has OS Disk and 2 data disks as mention below









What we can do is





  1. Backup All Data disks (Typical option)
  2. Backup only the OS disk
  3. Backup OS Disk + Disk 1
  4. Backup OS Disk + Disk 2




What we cannot do is back up on the data disks without the OS disk.





I will talk about option 2 and 3 ( 4 is same as 3). Basically I will be covering the new options. Alos on this to note, at the moment option 3 only can be set from powershell. There is no GUI option for it.





Backup OS Disk + Data Disk 1





Get VM Disk Details




Get-AzDisk -ResourceGroupName AE-DEV-LINUX









Get Azure VM Datadisk details




$Vm = Get-AzVM -ResourceGroupName AE-DEV-LINUX -Name LinuxVm01





Determine Datadisk lun details




$vm.StorageProfile.DataDisks









Specify the data disk lun numbers seperated with a comma




$disks = ("0")
$targetVault = Get-AzRecoveryServicesVault -ResourceGroupName AE-DEV-LINUX -Name LinuxRecovery









Setting the vault content




Set-AzRecoveryServicesVaultContext -Vault $targetVault









GetBackup policy details to a variable




$pol = Get-AzRecoveryServicesBackupProtectionPolicy -Name "Linux"









Enable Protection




Enable-AzRecoveryServicesBackupProtection -Policy $pol -Name "LinuxVm01" -ResourceGroupName "AE-DEV-LINUX" -InclusionDisksList $disks -VaultId $targetVault.ID









check the Backup status




$item= Get-AzRecoveryServicesBackupItem -BackupManagementType "AzureVM" -WorkloadType "AzureVM" -VaultId $targetVault.ID -FriendlyName "LinuxVm01"









Backup OS Disk Only





To backup the OS disk only, we can achive this from GUi. Simply browse torecovery services vault.





Azure VM Backup Page




Azure Backup select Server




Once you select the VM, you can simply tick the option to backup OS only









Or what you can do is powershell use the below parameer to exclude all data disks









Hope this helps someone (y)


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