HP StorageWorks 4000 Compaq StorageWorks Fibre Channel Troubleshooting Guide - Page 65

Determining a Bad Link

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5-6 Compaq StorageWorks Fibre Channel Troubleshooting Guide Determining a Bad Link Begin Are Fibre Channel Tape Controllers Missing? Yes Were FC-AL errors detected? No No Yes Done Determine which loop has the errors by highlighting one Host Controller at a time and looking at the Error Histogram. Are all Fibre Channel Tape Controllers missing on a particular FC-AL? No Determine which Tape Controller are missing by highlighting the server. The Fibre Channel LED on each Yes 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. 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.

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5-6
Compaq StorageWorks Fibre Channel Troubleshooting Guide
Determining a Bad Link
Begin
Are Fibre Channel Tape
Controllers Missing?
Are all Fibre Channel Tape
Controllers missing on a
particular FC-AL?
Determine which loop has the
errors by highlighting one Host
Controller at a time and looking
at the Error Histogram.
No
No
Go to Checking the Link
between the Storage Hub 12
and the Host Bus Adapter flow
chart.
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.
Yes
Yes
No
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.
Were FC-AL errors
detected?
Done
Yes