This is a mixture of W2K and W2K3 DCs AD environment. There are two domain, a.com, and b.a.com respectively; one W2K Dc and one W2K3 DC are located at a.com, and one W2K3 dc located at b.a.com.
My boss wants me to upgrade the only W2K DC located at a.com. There are 3 sites, W2K Dc is located at site a, W2K3 at site b, and another W2K3 at site c. W2K dc is also file server with up to 120GB files and folders.
Can I directly upgrade to W2K3 for the w2k dc? What are those considerations I have to take to prepare this dc for upgrading? Any better solutions with less risk are welcome!