Whereever you got this file from, see what it says about the exact meaning of autopartition and repartition. Generally, 1 = yes and 0 = no.
I am having one hard disk with 3 partitions C: D: E: respectively. I am doing unattended windows installation. In winnt.sif file if i select AutoPartition=1 and Repartition=Yes, then it will remove all the existing partition and create one (C for windows installation.
My question is HOW can i format and install windows in the C: drive only with unattended installation. I dont want to touch D: E: drive during new installation .. Is it possible.. Below is my winnt.sif details