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.
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 | NOTE: Before using these troubleshooting steps, you must have
installed, configured, and verified the Fibre Channel hardware on
the host and on any devices. |
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Adapter
LEDs |
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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 |
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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 |
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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.
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 | CAUTION: TDUTIL is a powerful diagnostic tool that may cause
problems if used incorrectly. |
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Reading
VPD Information |
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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 |
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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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