In recent versions of Windows®, volumes are recognized by a serial number assigned by Windows. When VMs are cloned, the serial number for each VM volume is cloned as well. During normal operations, this cloning is not an issue; however, when vRanger is cloned from the same source or template as a VM being backed up, the vRanger volume has the same serial number as the source volume.
For backup operations using HotAdd, source disk volumes are mounted to the vRanger VM. If the source VM volumes have the same disk serial number as the vRanger volume, which is the case with cloned VMs, the source VM’s serial number is changed by Windows when mounted to the vRanger VM. When restoring from these backups, the boot manger does not have the expected serial number, causing the restored VM not to boot until the boot information is corrected.
Installing vRanger on a physical server provides a method to off-load backup resource consumption from the VMware® ESXi™ host and network. While you can perform Machine-based LAN in this configuration, LAN-free backups are the primary driver for using vRanger in a physical server. For more information, see and .
• VA-based HotAdd: This transport mounts the source VM’s disk to the vRanger VA deployed on the source host or cluster. This method allows vRanger — through the VA — to have direct access to the VM data through the VMware® I/O stack rather than the network. In this configuration, data is sent directly from the VA to the repository.
This method is the recommended transport option due to the simplicity and flexibility of the configuration. To use this option, you must have a vRanger VA deployed on every host or cluster for which you want to configure backups. For more information on HotAdd, see .
• Machine-based SAN: This transport option uses your fibre-channel infrastructure or iSCSI network to transport backup data to the vRanger machine.
To perform machine-based SAN backups, vRanger must be installed on a physical system attached to your SAN environment. This setup is a high performance configuration that requires vRanger to be connected to your fibre or iSCSI network. In addition, the VMFS volumes containing the VMs to be protected must also be properly zoned and mapped to the vRanger server.
Click Start > All Programs, and enter diskpart.
Run the automount disable command to disable automatic drive letter assignment.
• Run the automount scrub command to clean any registry entries pertaining to previously mounted volumes.
• Only one vRanger server should see a set of VMFS LUNs at one time. For backups only, The vRanger server should have only read-only access to the LUNs. To perform LAN-free restores, ensure that the vRanger server has Read + Write access to any zoned VMFS LUNs to which you want to restore.