windows NT

I have 5 compaq servers. PDC and BDC with 3 9.1 GB hard drives in a raid 5 config. Each has a C & D partition. I have 3 Citrix servers each with 2 9.1 GB drives in a mirrowed config. I want to expand the array in my PDC by adding another 9.1 GB drive. But I don’t want to create another partition, I want to extend the D partition. I have a 221 smart- array controller which does not allow me to do this. Does anyone has any suggestions.

pdc