6
Connecting External SCSI Devices
Your system has a single-channel Symbios 8952U low-voltage differential signaling (LVDS) Wide
Ultra2 SCSI controller card. The system’s internal SCSI devices connect to the card’s internal
connector. You can connect Fast, Ultra, or Ultra 2 SCSI devices to the card’s external port.
To ensure data integrity and promote optimum performance:
♦
The maximum speed of a SCSI bus is limited to the speed of the slowest device on that bus.
♦
Use the shortest cables possible to connect SCSI peripheral devices.
♦
Use high-quality SCSI cables to ensure adequate shielding (impedance of 110 to 135 ohms).
To connect external SCSI devices:
1.
If the system is connected to AC power and operating, shut down the system and unplug the
system power cord from its AC power outlet.
2.
Connect one end of a SCSI cable to the SCSI port on the system.
3.
Connect the other end of the SCSI cable to a SCSI peripheral device.
4.
Connect a SCSI cable between SCSI ports on any additional SCSI peripheral devices.
5.
Set the SCSI ID of each peripheral device to a unique SCSI ID number. Do not use any SCSI
ID numbers already used by the system.
6.
For each SCSI peripheral device connected to the port, if the device is:
−
The last or only device on the SCSI chain, enable SCSI termination
−
Not the last or only device on the SCSI chain, disable or remove SCSI termination
7.
Ensure that the power switch on each peripheral device is in the off position; then connect the
power cord from each peripheral device to an AC power outlet.
8.
Turn on power to all connected SCSI peripheral devices and then start the system.
9.
If necessary, install software drivers and configure the peripheral devices according to the
vendor’s instructions.
Most SCSI controllers do not recognize a hard disk drive formatted using a different brand of
controller. You must use Symbios-formatted hard disk drives with a Symbios SCSI controller.
See Chapter 3, “Configuring the System,” for information on the SCSI Configuration Utility.
SCSI Port
