Resizing System Partition with PERC 6/i

The perc isn't presenting partitions.  It presents two different logical devices.  It is as if you have 2 disk drives, and no raid controller, where one is C and the other is D, and you are trying to "resize" C.   You can't.

Backup using acronis or ghost. then blow away the configuration, build it the new way, then restore.  

How can you tell that without looking at the RAID config or in disk management?

Just playing the odds .. because if it wasn't configured that way, then it wouldn't be "causing some troubles" for a sysadmin who is obviously more than capable of resizing partitions.

I understand that RAID presents a logical device, I'm just unsure what role the RAID card will play in partition resizing; as it is possible to resize partitions in single hard drive setups. (ie a Desktop machine with one physical drive.)

Theoretically the RAID card should be a mute point in this scenario and I should be able to resize the partition with no problem, but if that's the case and the RAID controller is simply presenting disk drives, then why does windows need special drivers to install on the logical devices that are setup on the RAID card?

Note:  I don't think there are any partition resizing tools that run in windows, I'm just using Windows as an example of something that is using special drivers, when theoretically it shouldn't need them.

Windows needs a special driver to talk to the controller for speed really, it could use INT13H which most RAID controllers support, indeed you've probably installed Windows without the correct driver in the past and seen it copy everything to the disk, reboot and then complain nothing's there. (We've all done that in the past too). During the copy phase from the Windows DVD it's using the basic INT13H BIOS extension.

There are partitioning tools that run while Windows is running, although most are offline CDs. Windows itself has diskpart that extends volumes online (not C: though in win2003), and 2008 exposes shrink and grow in the disk manager GUI.

Any chance of a screenshot from disk manager?

Ask and you shall receive:

 
The goal is to steal from E: and give to C: as its contiguous space.  Its not currently empty, but I can move everything out of it if need be.

I have done it with Paragon Partition Manager many times. You will need to shrink D: partition then shrink extended partition thus to take space out of Extended partition and finally assign it to C: partition.