Technical data

12. Troubleshooting the Extender

Issue: Self-Test is failing.

Resolution:

• Make sure the DB9 loopback adapter shipped with the Extender is connected

if you’re using fiber to connect the two units. If this device is not connected,

the self-test will always fail.

• If you’re using coax to connect the two Extenders, make sure you have not

exceeded the length specifications of the coax cable.

Issue:

Link Test is failing.

Resolution:

• A failed Link Test may indicate a bad connection between the two Extenders.

Make sure the fiber cable lengths or coax cable lengths are within the

specifications of the unit.

The maximum fiber cable lengths are as follows:

• 2 km (1.2 mi.) with 8/125-µm single-mode fiber (SMF).

• 550 meters (1800 feet) with 62.5/125-µm multimode fiber (MMF).

Issue:

SCSI bus errors showing in the Control Software.

Resolution:

• If the errors are infrequent and occur randomly, make sure the SCSI cables

connecting the devices to the Extenders are within the SCSI distance

specifications and are proven to be good cables. Often, switching out a cable

will solve this issue.

• Make sure the Extender at the other end of the connection has not been

disconnected or turned off.

• Make sure the fiber or coax cable lengths are within the specifications of the

Extender.

CHAPTER 12: Troubleshooting the Extender