Adaptec AHA-2940AU User Guide - Page 2

2 Installing the Host Adapter Follow these instructions to install the host adapter: 1 Turn OFF power to the computer and peripheral devices and disconnect the power cords. 2 Remove the cover from the computer case. 3 Locate an unused 32-bit PCI expansion slot (the slot must support Bus Master data transfers); unscrew and remove the metal bracket that covers the card-slot opening. (Save the screw to use when securing the host adapter in your computer.) PCI slots are shorter than ISA or EISA slots and are typically white. One of these may be a shared slot into which you can insert either an ISA/EISA board or a PCI board. 4 Insert the host adapter in the PCI expansion slot. Press it down firmly so that the contacts are securely seated in the slot. 5 When the host adapter is firmly seated in the expansion slot, secure the metal bracket of the host adapter with the screw you removed in step 3. Do not replace the computer cover or reconnect your computer and peripherals to their power sources yet! 3 SCSI Configuration Guidelines Before installing your SCSI devices, you should understand the basic SCSI concepts described in this section. The information will help you set up your host adapter and devices so they function properly. SCSI ID Numbers Each device attached to the host adapter, as well as the host adapter itself, must have a unique SCSI ID number (0 to 7 for the AHA-2940Ultra, and 0 to 15 for the AHA-2940Ultra Wide). We recommend that you leave the host adapter set to its default setting of SCSI ID 7. If you need to change the host adapter SCSI ID, see Configuring the Host Adapter on page 7. To change the SCSI ID on 2