Altos 1100E Series User’s Guide
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4.4 SCSI Troubleshooting Checklist
The AHA-3950UB SCSI controller has been tested for compatibility with a wide
range of SCSI devices. Most problems that occur during installation result from
errors in preparing and connecting devices on the SCSI bus.
Answer these questions first if a problem occurs during installation:
• Are the power cables and SCSI interface cables properly connected?
Connect internal SCSI devices to your computer's power supply. Connect the
power cables of external SCSI devices to a grounded line power outlet. Follow
the instructions in the computer and SCSI device documentation.
• Is pin-1 orientation maintained throughout the SCSI bus?
• Are the PCI bus and slot parameters set correctly in your computer's Setup
program?
The PCI bus is designed to assign IRQ, port address, and BIOS address settings
automatically to the SCSI controller. But you may need to assign some of these
values manually in the Setup program.
• Is each SCSI device, including the SCSI controller, set to a unique SCSI ID?
• Is SCSI termination set correctly?
If your problem is still not resolved, continue with the next section.