It appears that the Microsoft HPC Pack setup in Beta2 doesn't prompt for a location for the REMINST share, and wants to put it on C:. This requires substanial free space on the primary drive. It seems that the Data directory is controlled by a registry key, but changing that seems to break a number of things.
At first glace, being able to use WDS from a single-drive headnode would seem to a plus oven CCS V1, which required two partitions. But what if I had the two partitions already and acutally want to use the second one for deployment (for example, in upgrade scenarios?)