You may need to run a setup program or configuration utility to configure a new adapter. On ISA and some MCA bus machines, you may need to change the interrupt vector and I/O addresses set on the host adapter to avoid conflicts with existing adapters. You should also disable the BIOS on secondary controllers that you install. See ``Using the manufacturer's setup program'' and refer to your hardware documentation for detailed instructions.
A host adapter is configured into the system when you first install one of the peripheral devices connected to the SCSI bus that it controls. See ``Adding a SCSI peripheral device''.
The number of different SCSI host adapters that can be configured for use with your system should be specified in the hardware documentation. See SCO OpenServer Features and Limitations for information about supported mass storage drivers.
Information on diagnosing and fixing problems is presented in ``Troubleshooting SCSI host adapters''.