HP 9000 V-Class, Operator'S Manual

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70 Chapter 7
Recovering from failures
System hangs
System hangs
System hangs are characterized by users unable to access the system,
although the LCD display and attention light may not indicate a problem
exists. The system console may or may not be hung.
Use the following procedure to troubleshoot a system hang:
Step 1. Press
Enter
at a terminal several times and wait for a response.
Step 2. Press
Ctrl-C
at a terminal to abort an executing command.
Step 3. Check another terminal to verify that the problem is not just a console
hang.
Step 4. At the console window of the teststation, use one or both of the following
utilities to communicate with the server:
•
ping
•
telnet
See the
ping
and
telnet
man pages for more information about options
and usage.
Step 5. If possible, wait about 15 minutes to see if the computer is really hung or
if it has a performance problem. With some performance problems, a
computer may not respond to user input for 15 minutes or longer.
Step 6. If the computer is really hung, reset the server by issuing a
do_reset
command from the console window of the teststation.
do_reset
[node] [level]
node node to reset. Default is all nodes connected to the
teststation.
level level to reset. There are four:
1
Jtag controller—core utility board
reset, hard reset, clear option bits
and send messages to
ccmd
. (default)
2
Jtag controller—core utility board
reset and system soft reset