PT1Xoom, What is the OS on the server? If it is 2008 then you can resize it through disk mgmt, not OMSA.  If you have 2003 you are kind of stuck, as you exceed the 2TB limitations on the array with the addition of the new drive, AS WELL as you can't extend a dynamic disk in 2003. 
I am having some trouble expanding a data drive.  I added a 750 GB drive to an array that already had 3 750 GB drive, so this is the 4th.  I went into Dell OpenManage Server Administrator and reconfigured the array.  In the manager, I see the size is now 2094.38 GB.  In Windows Disk Management, Disk 1 is 1396.24 GB, but I do not see any Unallocated Space.  Disk 1 is a Dynamic disk, not a basic disk.  I ran diskpart, but it does not see the additional space, either.  I ran Gparted, and it sees the additional space; however I receive an error "Parted can't resize partition managed by Windows Dynamic Disk".  Any suggestions to expand the disk?  Thanks.
Problem expanding data drive