I setup a task to run Diskpart and reference an answer file. Microsoft has this well documented.
I am using PXE boot with WinPE 2.1 and DS 6.9
I came up with this solution because we where getting HDD's with no partition table from the Manufacture and the image wouldn't lay down using rdeploy.
My commands are:
diskpart.exe /s Z:\Scripts\Diskpart.txt
(Z: is mapped to my express share and Diskpart should be part of WinPE)
Commands in the text file
select disk 0
clean
create partition primary
select partition 1
active
format FS=NTFS Quick
assign LETTER=C
exit