Determining A Bad Link - Compaq StorageWorks 4000 - RAID Array Troubleshooting Manual

5-6 Compaq StorageWorks Fibre Channel Troubleshooting Guide

Determining a Bad Link

Are Fibre Channel Tape
Controllers Missing?
Are all Fibre Channel Tape
Controllers missing on a
particular FC-AL?
Determine which Tape
Controller are missing by
highlighting the server. The
Fibre Channel LED on each
Tape Controller will blink on
all working Tape Controller.
To troubleshoot the missing
Tape Controller, go to
Checking the Link between the
Fibre Channel Storage Hub 12
and Fibre Channel Tape
Controller flow chart.
Begin
Yes
No
Yes
Were FC-AL errors
detected?
No
Determine which loop has the
errors by highlighting one Host
Controller at a time and looking
at the Error Histogram.
Once the FC-AL is determined
find the failing device by
unplugging one device at a time
from the Fibre Storage Hub 12.
Watch for errors to clear from
the histogram.
Depending on the failing
device found, refer to the
Checking the Link between
The Storage Hub 12 and the
Tape Bus Adapter flow chart or
Checking the Link between
the Storage Hub 12 and the
Host Bus Adapter flow chart.
Go to Checking the Link
between the Storage Hub 12
and the Host Bus Adapter flow
chart.
No
Done
Yes