Reason 2 A lack of SCSI termination will disrupt SCSI bus integrity. The first
and last devices on the SCSI bus should be terminated.
Termination is used so that signals and data can be transmitted
successfully to and from all devices on the SCSI bus. By default,
most SCSI host adapters are already terminated. Active terminators
also recommended over passive terminators.
Step 1: Turn off the power to your PC and all peripherals.
Step 2: Verify that only the first and last devices are properly
terminated with terminator switches or by external terminators.
Step 3: If you are not sure about a device being terminated, refer to
the device’s manual for details.
Step 4: Power on all peripherals first and then your PC.
Step 5: If you still have problems, power off all peripherals and the
PC, disconnect all peripherals from the host adapter and
begin attaching one peripheral at a time. Power on all
peripherals first and then your PC. By process of elimination,
you can find the peripheral which is causing the problem.
Reason 3 Exceeding the maximum SCSI bus length. It is recommended that
the overall maximum SCSI bus length (sum of internal & external
cable lengths) should not exceed 6 meter (19.7 feet).
Step 1: Turn off the power to your PC and all peripherals.
Step 2: Verify that the overall SCSI bus length does not exceed 6
meters (19.7 feet). If it does, remove some SCSI peripherals
so that less cable is used or replace longer SCSI cables with
shorter length cables.
Step 3: Power on all peripherals first and then your PC.
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