StorageTek 9840 - Manual (Page 216)

Fibre Channel Loop Test
8-8 Sixth Edition 95741
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Fibre Channel Loop Test
When you suspect Fibre Channel interface problems, you can conduct a fibre
channel loop test to check the drive’s optical ports as “alive or dead”. This test
will isolate the interface problem to the drive, or to the interface.
Tools Required for the Fibre Channel Loop Test
• Dual SC multi-mode fiber cable
Fibre Channel Loop Test Instructions
1. Take the drive offline to all hosts.
2. Disconnect the Fibre Channel interface cable at the drive end.
3. Connected a known good SC multi-mode fiber cable from Port A to Port B
on the drive.
Note: The ports should see each other and then arbitrate a loop address for
each port.
4. Place drive Online and navigate to the View Cfg ? menu .
5. Press Select to enter View submenus, then navigate to View PrtA?
submenu.
6. Press Select to enter View submenus, then navigate to A_I=xxyyzz
submenu.
Notes:
1. If the drive is operational, the current arbitrated loop address for
Port A will be displayed.
2. If Hard PA was Yes , the loop address will equal the Hard PA.
3. If Hard PA was No , the loop address will vary, typically:
A_I=000001 for Port A and A_I=000002 for Port B.
4. If A_I=...... is displayed, the drive is defective.
(Port A or Port B is not functioning properly; however, this test will
not determine which port is defective.)
7. Disconnect the fiber cable loop from Port A and Port B.
8. If loop test failed, replace drive.
9. If loop test was good, replace interface fiber cable.
Note: If replacing interface fiber cable does not solve the interface problem,
the fault is within the host system components.