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.
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