The Acronis Backup for VMware (Acronis vmProtect) 9 Bare Metal Recovery of the ESXi host feature provides a functionality that helps to minimize the recovery time if the ESXi server crashes, fails to start or doesn’t work properly after a patch update. The feature allows you to restore ESXi server binaries and patches, ESXi configuration, and missing VMs (VMs present in backups, but missing on the datastores; VMs should be backed up separately) after the ESXi server is recovered and started.
ESXi host configuraiton backup creation procedure:
When the backup is started the software enables the SSH connection to the ESXi host and the software runs the special script on the ESXi host that backs up the content of ESXi server folders and stores it in a .tar archive. After that the archive is copied to the backup location. The virtual machines and datastores are not backed up.
ESXi host configuraiton recovery procedure:
The ESXi host configuraiton recovery can be performed only using Acronis Bootable Media. When the ESXi host configuration recovery is started the software chooses the first HDD (by BIOS order) to create ESXi system partitions, recovers the data to these partitions and then the system will be rebooted into the ESXi environment.
Upon boot-up, the ESXi executes a special script which configures the vSwitches and datastores according to the settings specified in the ESXi configuration recovery wizard.
After that Acronis Agent (Virtual Appliance) is deployed into the newly created datastore. Then, it executes the recovery of the missing virtual machines from the backup locations specified in the ESXi configuration recovery wizard. It also scans these backup locations for the source ESXi host VMs backed up after the ESXi configuration backup and restores these virtual machines.
A virtual machine is considered “missing”, if it is not detected in any of the datastores currently recognized by the restored ESXi host. The virtual machines are restored to all the detected datastores steadily filling them up and leaving there at least 10% of the free space.