1 HV Installation and Operations Guide

194 Diagnosing Problems Chapter 8

Cannot Confirm Connection Through a Fibre Channel Switch

1. Check the LED indicators on each switch port.

— Steady green indicates that the port is online (connected with a device

over FC).

— Flickering green indicates frames are being transferred through the

port.

— Yellow indicates port is not online, is disabled, or in fault.

2. No light indicates no module, no cable, or power is off.

3. Telnet into the switch using instructions provided with the switch.

4. Using the

SwitchShow command, confirm that the ports connected to the

FC HBA and the bridge are online.

5. Using the

nsShow command, confirm that the FC HBA and the bridge

have logged into the name server.

6. Refer to the FC switch documentation for service procedures.

Cannot Confirm the Library or MO Jukebox Connection (HP-UX)

1. Confirm the library or MO jukebox connection by using the ioscan

command.

2. Before powering-on the bridge, make sure the library or MO jukebox and

drives are configured for SCSI. This can be done through the library’s front

panel.

3. Make sure the library or MO jukebox, drives, bridge, and switch are

powered-on and connected properly.

4. Verify SCSI bus configuration: Check all appropriate devices for the

following conditions:

— Termination: Problems with termination can cause intermittent or hard

failure. Terminate the SCSI bus on both ends of the bus. By default, the

bridge provides internal termination at the end of each SCSI bus.

Check each terminator and connector for bent pins.

— Bus Type: Single-ended devices cannot be combined with differential

devices on the same bus. The FC 4/1 HV bridge provides only HVD

SCSI buses. SE or LVD SCSI devices cannot be supported on this

bridge. Verify that all devices hooked up to each bus of the FC 4/1

HV are HVD SCSI devices.