Extend system drive on a 2008R2 server. From Google basically I found where everyone said it takes a third-party software to accomplish this task. This morning in a desire to practice using some of this software I set up a lab server 2008R2. Partitioned the first drive (300GB) into a 100 GB partition and a 200GB partition which I installed the OS to the first 100 GB partition. Installed some drivers, rebooted server. Formatted the 200GB partition copied a few files over to it and rebooted again. All looked good and was ready to download 3rd party software to begin testing.
However on a whim I went into Disk Management, deleted the second partition click on the C: (system) drive and the extend button was available. I extended the 100GB C: to a total of 300GB now.
Is this a fluke, am I missing something