Compaq SCSI Hard Drive in Non-Compaq

Does anyone know how to get a Non-Compaq system to use a Compaq SCSI hard drive. I have acquired a large number of Compaq Hot-Plug hard drives and external storage systems and would like to use these on a couple of servers that I have. I have connected these to the servers, but the SCSI controller does not ID any of the drives, however if I connect them to a Compaq server, they work as advertised.