User manual

Basic troubleshooting
Warning. Always turn off the system before changing jumpers or
unplugging cables and cards.
If your drive does not respond or function properly when you turn
the power on following the hardware installation, perform these
basic checks:
• Check all cards. Make sure all cards are seated securely in
their slots on the motherboard.
• Check all cables. Make sure all cables are securely con-
nected. A damaged ribbon cable or connector strain relief can
cause the SCSI bus to fail.
Verify that the pins 1 of each device on the cable are aligned.
Use the edge-stripe on the cable to denote pin 1.
Caution. Improperly aligning or reverse-plugging pin 1 of one
device with the other devices on the cable can
damage that device or other devices.
• Check the SCSI ID. Make sure the drive’s SCSI ID does not
conflict with that of another device.
• Check the terminator configuration. If the drive is at the end
of the bus and external termination is not used, the drive’s
terminator must be enabled. Disable or remove termination on
all devices between the drive and the device at the other end
of the bus.
If the drive is not the last device on the bus or if external
termination is used, be sure to remove the jumper that enables
the drive’s termination.
16 Medalist 1080sl SCSI Installation Guide, August 1995