v-magine install blocked on [sda] attached SCSI disck

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Hello, I just download, je zip file and launch the exe file. But now I am just waiting for [sda] attached SCSI disk in the PXE booting openStack controller VM.

The console out put is : .... [ 81.609231] sd 2:0:0:0 [sda] write cache: enabled, read cache : enabled, doesn't support DPO or FUA [ 81.620570] sda: unknown partition table [ 81.626681] sd 2:0:0:0 [Attached SCSI disk

is there any specific configuration for installation on an 2012R2 box ?

Thanks for any help.

Jean marie