Technical data

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CONTROL SOFTWARE FOR SCSI EXTENDER AND SWITCHES
13.2 Troubleshooting Extenders Connected to Tape Devices
Issue: Tape devices not targeting or SCSI bus locks up while in operation.
Resolution(s):
• Make sure the Link Test on the Extenders runs without errors by pressing Link
Test on the front panel. If it fails, then the fiber connection between the two
units is not working properly. This is normally an issue with the fiber cable
connection or excessive fiber or coax length.
• Check to make sure the cable lengths adhere to the SCSI standards.
Single Ended: 3 meters
Differential: 25 meters
• Is termination set properly? The Extenders should have the internal
termination turned ON. This is the factory default when shipped. The last tape
device in the SCSI chain must be terminated.
Example: T = Termination
Figure 13-1. Termination example.
• Are the SCSI cables known to be good? Test several different cables to ensure
that the SCSI cables are functioning properly.
Host Adapter Extender
Extender
DLT Tape
DLT Tape
SCSI
Cable
SCSI
Cable
TT
T
T
Fiber or
Coax Cable