I am a new IT Manager, learning on the job you could say. We are upgrading servers and looking to add speed. We want to add a SCSI hard drive to our file server. The server is nothing more than a Gateway 800 mhz desktop running Red Hat 7.2 Professional Server. How do you go about purchasing and installing a SCSI hard drive? Is there an expansion card to buy first? Does that mean we will have an external drive?