HP e3000 Fibre Channel Mass Storage Adapters Service and User Manual (32650-90910)

Chapter 4
Troubleshooting
Introduction
22
Introduction
Troubleshooting Fibre Channel problems can be difficult because a variety of hardware and software
components may be involved. Also, the problem affecting the system may originate in another part of the
Fibre Channel mass storage interconnect. A systematic approach to troubleshooting is helpful.
If you cannot solve the problem on your own, contact your Hewlett-Packard representative.
NOTE Before using these troubleshooting steps, you must have installed, configured, and verified the
Fibre Channel hardware on the host and on any devices.
Adapter LEDs
The status LEDs on the fibre channel mass storage adapter indicates the state of the adapter. The following
Table 4-1 describes the different states for the A6795A adapter.
TDUTIL
TDUTIL is an MPE/iX utility, available for troubleshooting fibre channel host bus adapters, supported on HP
e3000 systems. This utility provides the ability to display information such as the N_Port ID, Node
World-Wide Name, Port World-Wide Name, link speed, chip revision number, VPD (Vital Product Data)
information and more.
The utility can be run from the MPE/iX CI command prompt by giving the FC adapter hardware path as
parameter.
:tdutil <adapter hardware path>
TDUTIL supports usage of the options while invoking the utility, but these options are meant to be used only
by HP Support Representatives for troubleshooting. Customers are advised to use TDUTIL only by
specifiying the adapter path and not make use of any of the options. For detailed information on this utility,
refer to the article on TDUTIL in the MPE/iX 7.5 Communicator document.
A sample output of TDUTIL utility is shown below for the A6795A adapter:
Table 4-1 A6795A LED Indicators
PWR/ACT
(green)
LNK/SPD
(green/amber)
Probable Cause
Recommended
Action
Off Off Machine not powered On Power on machine
On Off During power up During link
Initialization
No action required
On Green Fibre Channel link is at 2Gb speed No action required
On Amber Fibre Channel link is at 1Gb speed No action required
Flashing On After initialization, flashes only
when there is I/O activity.
No action required
If the LNK/SPD LED remains off, check cable connections, or call your HP representative.