Merging Hot Swap(SCSI) into Drive C: in Windows Server 2003

I’m new in handling Windows Server 2003 and i need help in expanding the storage of my Server.
My drive C:(SCSI) has 80GB space the problem is that now it only has 10Gb sapce left…
Is there a way on how to merge hot swap disk(300GB SCSI) into my drive C:(80GB SCSI). Is this possible or not?

Yes the server supports SCSI hotswappable.

The server is an xSeries 236.

Thanks..