VMware and Hyper-V

 The two major players in the virtual machine market are Microsoft and VMware. VMware was actually first and now offers its products for free as well. Microsoft's Hyper-V platform recently gained a crucial advantage over VMware in that it offers better live backups via Volume Shadow Service
In the past, VMware was the leader and already offered technology to make use of all CPU cores and processors. After some time passed, Microsoft has worked on its own code to compete with VMware and now also has this feature implemented Hyper-V Server. In Hyper-V you can install a virtual machine directly to a physical drive and bypass VHD files altogether.
Therefore there is no need to have these slow VHD files anymore if you don't want to. Reading and writing directly to the disk is a major speed factor and needs to be considered when you have either many VMs on the same host or very hard-drive active VMs.
Some have suggested that Hyper-V is strong as it has many features to offer the user. Only time will really tell who is the champion in this market.

BackupChain VMware and Hyper-V software will ensure your  software and files are properly backed up. Map a Drive Letter to an FTP site with BackupChain DriveMaker. It connects any FTP site and assigns a virtual drive letter to it.