If you want to learn more about backup strategies for VMware ESX Server, look no further than this whitepaper from vizioncore. They cover the imortant topic of virtual machine backups and specifically a winning strategy for efficient and effective backup and recovery of VMware guest images on the ESX Server environment.
They write:
Virtualization has enabled companies to manage resources more efficiently and effectively for their mission critical applications and data. Backups, restores and disaster recovery methods are essential responsibilities of managing your virtual infrastructure. Having a hot backup strategy can be difficult to manage without automation. Additionally, without availability in remote locations for the data, applications and physical infrastructures, the business will be at risk. The need for disaster recovery options that support a WAN environment is vital to businesses that wish to operate regardless of the issues that cause outages.
Grab the whitepaper, here.