I expanded the C partition.  I had been using a tool accessed by choosing Manage after right clicking Computer in windows explorer.  This tool was very different than the Manage tool in WinXP and Win7.  By choosing Computer Management from the Administer menu I got the familiar tool, which allowed me to delete the D partition, and expand C. Sorry to have wasted your time. Next up:  Adding two RAID 1 virtual disks, one 2tb the other 4tb.  That should give me enough storage for quite a while, and leaves two hot bays empty. Thanks.
I have a new Dell Poweredge T320 with the 710 RAID controller.The machine is running Windows Home Server 2012 Essentials. It has two 500gb hard drives in a RAID1 configuration.  80gb is allocated to the C (OS) drive, and the rest to D, a data drive. I want to resize the C drive to 120 GB to have head room. Under WSE I deleted the D partition and tried to extend the C parition, but that did not work.  How should I go about doing this?  A quick look through the Perc manual did not show an obvious way to resize partition.  Thanks in advance, Andrew
Resize C partition in RAID 1 array.