HP-UX 10.20 system down

[Anand_30]

Hi,

We have a HP-UX 10.20 server. It was working fine till yesterday but all of a sudden is not working. The server initially went unpingable but I found that it is in in the rebooting state.

The sytem administrator tried rebooting the machine but each reboot is taking close to an hour. The SA feels that there might be some system level probem.

Can anyone please help me out in this problem.

Thanks,
Andy

[Steven E. Protter]

If the NIC failed that could be it. Network related stuff like NFS would hang.

What does the console says. Boot from a serial console and see where it stops.

If the kernel boots thats good, check the syslog and see what the error is.

At this point, I would lean toward a NIC card. Those are not always terribly expensive.

SEP

[SS_6]

Try booting it into single user mode first.
At the bgenning of boot process intrupt within 10 sec when prompted.
Intrect with IPl--- Y
ISL> hpux -is
you will go to single user mode.
once you are in single user mode see message in systems logs, you may have to mount few vg00 filesystems manually
#/usr/sbin/mountall or mount one by one manually.
do init 3 to go to multiuser mode.
If you have some problem with Unix kernel try to boot it from another copy of kernel.

ISL> hpux /stand/vmunix.prev

[Shaikh Imran]

Hi,
The system going down can be because of many reasons:

1) Temperature
2) Power Problems
3) O.S panic
4) Core Dump by O.S. due to software failure
5) Failure of FRU/s in the system
6) NIc
7) Addition of any incompatible software or Patch
8) Root Disk etc..,
For this the very first thing is you should attacke the last major change made to the system ..,
In your case you can try to boot the system in the single user mode and see if you are able to start the system properly.
Then change the init levels one by one to know where the problem is
If you are not able to boot in the single user Mode it may be your kernel got corrupted
or etc then try to boot with the different kernel...
Better give the control to your SA,he is the best person to deal with at this situation,or if required call an HP representative..

Regards,

[PVR]

Pl give some more inputs.

If the reboot is taking close to an hour and you are getting login prompt, pls check /var/adm/syslog/syslog.log and dmesg outputs. If it is not booting at all botting try booting to single user mode (hpux -is from ISL prompt). IS there any error message appearing on the screen??

[Sanjiv Sharma_1]

Hi Anand,

The best option is to connect a serial(direct) console to the server and boot it in a single user mode.
ISL> hpux -is

Once booted,
#mount -a
# init 3

Check where it comes to a halt and then post it to this forum. Then it will easier for us to help you better.

hth.

[kamal_9]

Hi Anand
Connect the console and see whr the system getting more time to shutdown.and see the syslog.log,OLDsyslog.log*shutdown.log
regds
kamal

[Sarvesh A Dhuri]

Hi

when system is not booting , then the best option is to boot the systme in single user mode

at ISL> hpux -is

it will bring the system in single user mode , check for the disk status and file sytems , if system doesnt boot , if it is giivn the kernel level errors , then try to boot the system with older version of kernel