Boot into Maintenance Mode

[MikeL_4]

We have a system that we added some SCSI disk to, and was copying data to when after about 2 hours the server locked up..
I have not been able to reboot the server, or to reboot into single user mode successfully, the server starts the load of the kernel, then locks up again....
Is there a way to boot the server into some sort of maintenance mode, or from CDROM and then mount file systems to try and find what is causing the problem ??

[Andrew Rutter · Accepted solution]

hi,

it all depends upon which server model you have and which the OS is to help much further

have you tried LVM maintenance mode

from isl on parisc machine

ISL>hpux -lm

or ISL on integrity

ISL>boot lm

Andy

[Andrew Rutter]

hi again,

this may help you further too, there is a trouble shooting section.

http://docs.hp.com/en/5992-4589/index.html

Andy

[Andrew Rutter]

hi,

do you know if you have abackup kernal to boot from?

you could try this too

ISL>hpux /stand/vmunix.prev

Andy

[MikeL_4]

The server is running 11.11 and is PA-RISC server.... It is also using Veritas VXVM for the OS and NOT LVM.....

I didn't try the previous kernel, not thinking it could be a kernel problem as a kernel hasn't been created sine the last maintenance patches were applied about 3 months ago..

[Patrick Wallek]

>>I have not been able to reboot the server,
>>or to reboot into single user mode
>>successfully, the server starts the load of
>>the kernel, then locks up again....

Do you get any errors? Does it do a crash dump?

What model server?

[Khairy]

from isl, try:

ISL> hpux -vm

this will get vrts vol mgr up and running for maintenance.

rgds

[Armin Kunaschik]

Boot with vmunix -vm!

Then use vx_emerg_start to start the diskgroup. It might be necessary to clean a volume/group state with vxmend etc.

My 2 cents,
Armin

PS: Please assign points if you find answers useful!

[subodhbagade]

Hi,

(1) Try to login with your console ip.
(2) Depending upon your model you will get "MP" and "GSP" prompt, select the "CO" option and reboot the server.
(3) Interrupt the booting sequence.
(4)Intereact with IPL > y
(5) ISL> hpux -lm (you will be in Maintenance mode.

Regards,
Subodh.

[MikeL_4]

Something must of clobered the server... I can't get into Single user mode, backup kernel, or into hpux -vm....

I guess it's rebuild time...

[MikeL_4]

When I went to rebuild the server I noticed that the DVDrom drive was not showing up in the boot search...
Ended up finding the cable for the drive was broken, replaced cable, and I was actually able to boot the server up without having to restore.....