HP 3000/9x9KS Series, Service Manual

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Troubleshooting 3-33
HP-UX System Hang
Use the recovery procedure in Table 3-20. to resolve the problem.
Performing a Memory Dump
This section provides procedures for taking a memory dump for both MPE/iX and HP-UX systems.
MPE/iX Memory Dump Summary
To perform a memory dump:
1. Do a Transfer of Control (TC):
A. Type CTRL-B to get
CM>
prompt on console.
B. Type TC and hit RETURN key.
C. If Autoboot is enabled, hit any key to interrupt it.
2. Boot from Primary Boot Path:
A. Type yes to the Interact with IPL prompt.
3.
Perform a memory dump:
A. Mount the appropriate media on the ALTPATH tape drive and put the drive online.
B. At
ISL>
prompt, type DUMP command.
C. Enter appropriate site and problem data at Enter Dump Name prompt.
4. Restart the operating system:
A. At
ISL>
prompt, type START or START NORECOVERY as desired.
B. Resume normal system processing.
If you are reluctant to let users on the system until the Response Center engineer approves further
processing, call the Response Center. Report your concern to the Response Center coordinator and request
a Priority One code.
Table 3-20. HP-UX System Hang Troubleshooting
Symptoms Recovery Procedure
The machine is running, but no one
can access the system. 1. If possible, wait about 15 minutes to see if the computer is really hung or
if it has performance problem. With some performance problems, a
computer may not respond to user input for 15 min. or longer.
2. If the computer is really hung, perform a soft boot on the machine by
issuing a TC command. (Do NOT use the RS command if possible;
RS may destroy important troubleshooting information.)
3. Save the memory dump file (should be automatic) and call the HP
Response Center to have it analyzed.
The system console may or may
not be hung.