HotAdd Restores

HotAdd Restores

HotAdd restores for Amazon provide faster performance than traditional restores. By using a VSA proxy running on an Amazon instance, the restore operation can write directly to Elastic Block Storage (EBS) and inject Amazon drivers that are required for destination instances.

HotAdd restores are used for the following operations:

  • Restores
  • Live sync operations
  • Conversion from VMware to Amazon, for the following VMware guest operating systems:
    • Windows Server 2019, provided that the OS disk uses Master Boot Record (MBR) partitioning
    • Windows Server 2016
    • Windows Server 2012 R2
    • CentOS 7.x
    • RHEL 6.x
    • Ubuntu 18.x

Requirements for HotAdd Restores

  • The Virtual Server Agent proxy selected for the operation must be an Amazon instance in the same zone as the destination instance.

Requirements for VM Conversion and Live Sync Replication Operations when Amazon is the Destination

  • On the VSA proxy, create an Amazon folder under the software_install_path/Commvault/ContentStore folder, and extract the contents of the following zip files in the Amazon folder:
  • Make the following changes to source VMs before performing the backup that is used for conversions:
    • For both Windows and Linux source VMs, set the VMs to use DHCP. VMs with static IP addresses can only be converted or replicated using the import method.
    • Windows source VMs:
      • Install .NET 4.5.
      • Enable Remote Desktop Protocol (RDP).
      • Disable Windows Firewall.
      • Disable User Account Control (UAC).
      • Ensure that there is a minimum of 2 GB free space on the C: drive.
      • Verify that the Windows AutoAdminLogin feature is not disabled on the source VM, so that AWS drivers can be installed on the destination VM during conversion.
      • HotAdd conversion is not supported if the boot OS for the source VM uses GUID Partition Table (GPT) partitioning. Use the import method instead.
      • If the Windows security banner is enabled on the source VM, install the following components so that the converted instances can pass instance status checks:



    • Linux source VMs:
      • Enable Secure Shell (SSH) for remote access.
      • The host firewall (such as Linux iptables) must permit access to SSH.
      • Ensure that Xen drivers are installed on the VM:



        Installing Xen drivers on Linux guest VMs before backing up the VMs enables the required drivers to be in place when the Amazon instances are created, so that the Amazon instance can be started and users can access the instance.

      • Ensure that Linux VMs use GRUB (GRUB legacy) or GRUB 2 as the bootloader.
      • Linux VMs must use one of the following for the root file system: ext2, ext3, ext4, Btrfs, JFS, or XFS.
      • Linux VM /etc/fstab entries should use UUIDs instead of device names, because device names might change on conversion.

HotAdd Restore Process


  1. Create empty EBS volumes.
  2. Attach EBS volumes to proxy.
  3. Restore data to EBS volumes.
  4. Inject AWS components and drivers.
  5. Detach volumes from the VSA proxy.
  6. Create the Amazon instance from the EBS volumes.
  7. Automatically log on to the instance to install PV drivers and EC2 configuration service.


  1. Create empty EBS volumes.
  2. Attach EBS volumes to proxy.
  3. Restore data to EBS volumes.
  4. Detach volumes from the VSA proxy.
  5. Create the Amazon instance from the EBS volumes.

Last modified: 5/17/2019 7:28:03 PM