HP AA979A - StorageWorks SAN Switch 2/8V, Administrator'S Manual, Page: 296 / 465

308 Troubleshooting
Gathering information for technical support
If you are troubleshooting a production system, you need to gather data quickly. As soon as a problem is
observed, perform the following tasks (if using a dual CP system, run the commands on both CPs):
1. Enter the
supportSave
command to save RASLOG, TRACE, and
supportShow
(active CP only)
information for the local CP to a remote FTP location. On a dual CP system, only the local CP
information is saved and
supportShow
information is not available on the active CP.
NOTE: It is recommended that you use the
supportFtp
command to set up the supportSave
environment for automatic dump transfers and the use of the
-n -c
options; this will save you from having
to enter (or know) all the required FTP parameters needed to successfully execute a supportSave operation.
For details about the supportSave command, refer to ” Setting up automatic trace dump transfers ” on
page 298.
2. Enter the
pdShow
command to display data from a panic dump file. The panic dump file contains
information that might be useful to determine the cause of the system panic.
3. Enter the
saveCore
command to save or remove core files created by daemons.
For more details about these commands, refer to the Fabric OS Command Reference Manual .
Troubleshooting questions
Common steps and questions to ask yourself when troubleshooting a system problem are as follows:
1. What is the current Fabric OS level?
2. What is the switch hardware version?
3. Is the switch operational?
4. Impact assessment and urgency:
• Is the switch down?
• Is it a standalone switch?
• Are there VE, VEX or EX ports connected to the 4/256 SAN Director?
• How large is the fabric?
• Is it a secure fabric?
• Is the fabric redundant?
5. Run the
supportSave
command. (Refer to ” Viewing and saving diagnostic information ” on page 304
and ” Setting up automatic trace dump transfers ” on page 298).
6. Document the sequence of events by answering the following questions:
• What happened just prior to the problem?
• Is the problem reproducible?
• If so, what are the steps to produce the problem?
• What configuration was in place when the problem occurred?
7. Did a failover occur?
8. Was security enabled?
9. Was POST enabled?
10. Are serial port (console) logs available?
11. Which CP blade was active? (only applicable to the SAN Director 2/128 and 4/256 SAN Director)
12. What and when were the last actions or changes made to the system environment?