system panic, and can't into single user mode,what can i doo<x

[tigerjaz]

system panic, and can't into single user mode,what can i do???

[Peter Kloetgen]

Hi Tigerjaz,

did you allready try to boot an alternative kernel? During boot sequence, discontinue it, then in IPL> hpux /stand/vmunix.prev
...or whatever the name of your old kernel is.
Did you do any changes to your system? Use your installation CD and try to fix the problem with a repair shell. Is your system disk bad? Then use a mirror copy or a backup.

Allways stay on the bright side of life!

Peter

[Ravi_8]

Hi,

If you had kernel(vmunix file) backup, you can boot from backup file.
(from ISL.
isl> hpux /stand/backup file)

if u don't have use the install CD, get into maintenence mode restore only the files under /stand.

If you have ignite baackup then u can recover using make_recovery

if you doesn't have any of these, reinstall is the only solution

[Bill McNAMARA_1]

try hpux -lm -is

there are some cases where is will not work without lm.
ie when lvlnboot/lvmheaders on the disk are screwed.
Use lvlnboot and vgcfgrestore to repair on reboot.

Logs would be insteresting on boot.. it is possibly a hardware issue.. something failed. (do you have external scsi devices?) What do you have in the GSP logs, last log output, BCH SER HPMC info?

Later,
Bill

[Duncan Beattie]

Hi Tigerjaz

I have seen something similar before on an NClass sever running HPUX 11 where the system will not boot into single user mode, seems to hang and the terminal appears shut out.

Try looking at the contents of /etc/ioctl.syscon this file might be corrupt, or contain the wrong data. You can either remove the file and try to boot into single user mode, or compare its contents with the same file on a similarly spec'd system that WILL boot into single user mode OK..

Not sure if this is the same problem, but I hope it helps.

Duncan

[Duncan Beattie]

sorry, I meant to make it clear that there is no harm done by deleting /etc/ioctl.syscon 'cos the system creates it on boot up

D

[Martin Johnson]

You can boot of a maintenance CD, then check out your system.

HTH
Marty

[doug hosking]

Yes, knowing a little more about the configuration in question would be helpful. What release of HP-UX, what model system, what does the panic message say? Did you change something just before the panics started? If so, what and why? The best advice for you may vary depending on the answers to these and similar questions.