HP e3000 Fibre Channel Mass Storage Adapters Service and User Manual > Chapter 4 Troubleshooting

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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 "A6795A LED Indicators" describes the different states 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.

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:


 :tdutil 0/8/0/0

                    Vendor ID is = 0x00103c
                    Device ID is = 0x001029
         XL2 Chip Revision No is = 2.2
     PCI Sub-system Vendor ID is = 0x00103c
            PCI Sub-system ID is = 0x00128c
                        Topology = PTTOPT_FABRIC
                      Link Speed = 1Gb
              Local N_Port_id is = 0x011c00
     N_Port Node World Wide Name = 0x50060b00001000d4
     N_Port Port World Wide Name = 0x50060b00001000d3
                    Driver state = ONLINE
                Hardware Path is = 0/8/0/0
          Number of Assisted IOs = 126053
 Number of Active Login Sessions = 1
              Maximum Frame Size = 960
                  Driver Version = @(#) HP Fibre Channel Tachyon TL/TS/XL2 
                                   Driver B.11.00.10 (AR1201) Jan 9 2002

To know whether the fibre channel link on the adapter card is active, check to see that the Driver state printed in the above output is ONLINE.

CAUTION: TDUTIL is a powerful diagnostic tool that may cause problems if used incorrectly.

Reading VPD Information

You can use TDUTIL with the A6795A adapter to read VPD (Vital Product Data) information on the adapter, which can be useful in troubleshooting problems remotely. The command for retrieving VPD information is:


 :tdutil <adapter hardware path> vpd

Following is an example of the information that displays:


 V I T A L P R O D U C T D A T A
     --------- ------------- -------
     Product Description :'A6795A 2Gbps/1Gbps Fibre Channel 4X PCI HBA'
     Part number :'A6795-62001'
     Engineering Date Code :'A-4142'
     Part Serial number :'A56466014504'
     Misc. Information :'PW=15W'
     Mfd. Date :'A-4142'
     Check Sum : 0x46
     EFI version :'000000'
     Asset Tag :'NA'

Auto Speed Negotiation

The A6795A adapter is capable of transferring data at 1 Gb or 2 Gb per second. The adapter will automatically negotiate to find the highest speed that is common to the port and to the infrastructure connecting the port.

To display the link speed along with other existing adapter information, use the command:


 : tdutil <adapter hardware path>

The current link speed is displayed as part of the output. Once the adapter is operating at a certain speed, it will not attempt to negotiate again unless a link fails, or it detects a chip reset.

Chapter 4 Troubleshooting

HP Support Tools Manager (STM) under MPE/iX

Introduction

MPE documents

Adapter LEDs

TDUTIL

Reading VPD Information

Auto Speed Negotiation