Installing on the EX490 is blind, having no graphics output. I do know that when I tried to install the first time it failed (alternating red/aqua activity light) though after pulling the drive the partitions were set up as I posted earlier. I then deleted the partitions and tried again, but this time I added a $WinPEDriver$ folder to the root of the USB stick with the install media. Into that folder I put the drivers for the Intel/Silicon-Image SATA controllers and the Realtek LAN drivers. Then everything worked perfectly.
NOTE: If the SSD is bigger than 104GB you will have to change “WindowsPartitionSize=” from “MAX” to a number less than 104132 – “MAX” will not work if your SSD is bigger than 104GB!
So, your HDD or SSD has to be less than 104GB for MAX to work otherwise you'll need to set "WindowsPartitionSize=" to a number less than 104132 -- else your response file will not work.
@Joe, I'm not saying that you're wrong, but I had a completely different experience when I installed 2011 on my EX490. I didn't use an SSD, but I used an old 160GB Seagate to test on and the installer used the entire 160GB drive.
(Optional) Specifies the size in GB of the system partition. The size must be in the range of 20480 MB to 102400 MB. A value of MAX can be specified. If not specified, a value of 61440 MB is used. If the specified value is MAX, the Windows partition uses the entire disk.
It doesn't mention a limit on the 'max' setting, only that it will use the entire drive.
Also, when you're setting up 2011, it's best to make sure that all the partitions on the target drive are deleted (not formatted).
I just verified the partition map on the 160GB 2011 drive and it has a 100MB hidden system drive and a 148.95GB C: (system) drive.
Here's the contents of the cfg.ini file that I used (unique info sanitized):
If you're trying to extend the C: partition after the OS is installed, just pop the system drive in another machine and use disk-management to delete any D: partition and extend C: to use the rest. I don't think you can extend the C: partition of the system disk while the OS is running. You need to use a 2nd system to do it safely.