I can now confirm Issues with hard drives being recognized by Windows Server 2012 and Hyper-V, while using the 5th SATA port ( RED SATA eSATA 4) on Intel DH67BL & DH67GD motherboards. Windows Server can recognize the drive and will operate properly, but Hyper-V has issues recognizing the hard drive and showing ""any"" folder structure on any hard drive connected to the SATA (eSATA) port on the motherboard.
When in Hyper-V manager or even SCVMM 2012, HYper-V only sees the drive letter, and SCVMM 2012 does even see the drive letter.
This issue is being experienced on two Windows 2012 Servers, using Intel motherboard, and also issues have been experienced with Win 8 Pro with Hyper-V and drives.
So this means there are three Intel motherboards experiencing issues when using the internal 5th SATA (eSATA port - internal Red ëSATA Connector on Board).
I suspect other users who are having VHD creation issues on drives are also working on newer motherboards.
Note: This issue is was not experienced when using Windows Server 2008R2 and SCVMM 2008R2
Hope this helps.......
RF