We are about to start using VMWare Esxi on 4 physical servers.
We want to do backups to a NAS unit.
I see the free version of ESXi doesn't support backup.
We are small company with a small budget.
What is the most cost effective way to backup our VMDK image files without shutting down the virtual machines, which are a combination of Linux and Windows.
I addition to the ESXi hosts we also have a dedicated WindowsXP computer to run vSphere which is currently running Retrospect Professional for local backups plus a few key workstations.