Microsoft Monday tweaked its virtualization strategy by unveiling a stand-alone virtualization server that won’t require users to run the Windows Server 2008 operating system.

The announcement came at the company’s annual TechEd IT Forum conference in Barcelona, Spain, where Microsoft also outlined pricing, packaging and licensing for Windows Server 2008 and the availability of management tools that address needs of virtualized environments.

Microsoft’s virtualization announcement, however, is just a placeholder since the technology likely won’t be available until August 2008. Microsoft’s Hyper-V technology, formerly code-named Viridian and Windows Server Virtualization, will ship no more than 180 days following the release of Windows Server 2008, which is now slated between Jan. 1 and March 31, 2008.
Microsoft’s stand-alone hypervisor technology is called Hyper-V Server. It is hypervisor virtualization technology that is installed on the “bare metal” of a hardware platform without the need for a Windows operating system.

In fact, the Hyper-V Server could be the only piece of Microsoft technology running on the hardware given that Hyper-V supports virtual machines running operating system other than Windows, including Linux.

Microsoft rival VMWare has an enterprise-focused virtualization product it currently ships called ESX that also installs on bare metal.

Microsoft has been marketing virtualization as a feature of the operating system, but critics say the company is bending to the reality that OEMs will likely include a hypervisor virtualization layer as part of their hardware.

Dell, Fujitsu Siemens Computers, Fujitsu, Hitachi, HP, IBM, Lenovo, NEC and Unisys have all signed up to include Microsoft’s Hyper-V server on their platforms.

Microsoft, however, also plans to sell Hyper-V directly to corporate users who could wipe a server clean and install Hyper-V Server, which is priced at $28 and allows an unlimited number of virtual machines on a single box.

“Microsoft had clearly been very much in the hypervisor-virtualization-is-a-feature-of-the-operating-system camp,” says Gordon Haff, an analyst with Illuminata. “I don't think Microsoft would phrase it this way, but clearly this is a step back from you can only get virtualization in the OS.”