One must verify that the Operating System you wish to run is supported on your UCS hardware.
You can check this via the Hardware and Software Interoperability Matrix which contains a Operating System Interoperability Matrix.
Review the linked document for the latest information, however for the B200-M1 the supported operating systems are currently.
- Microsoft Windows Server 2003 x86 SP2
- Microsoft Windows Server 2003 R2 x86 SP2
- Microsoft Windows Server 2003 x64 SP2
- Microsoft Windows Server 2003 R2 x64 SP2
- Microsoft Windows Server 2008 x64 SP1w/Hyper-V
- Red Hat Enterprise Linux 4.8 64bit
- Red Hat Enterprise Linux 5.3 64bit
- Novell SUSE Linux Enterprise Server 1164bit
- Oracle Enterprise Linux release 4 64bit
- Oracle VM server release 2.1.5 64bit
- VMware ESX 3.5 Update 4
- VMware vSphere 4
- VMware vSphere 4i
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