topic Re: Boot Problem in Operating System - Tru64 Unix

Boot Problem

A Lakshmanan — Thu, 23 Jul 2009 19:40:20 GMT

Tru64 v 5.1B

Changed kernel parameter for oracle10g R2 and rebooted the system.

Got numerous errors : like Sysconfig tab attributes not set in subsystem ipc...and more..

I am able to login to single user mode now.
Replaced the original sysconfigtab file.
Still I got the same problem.

I tried bcheckrc and
got the following error:

Checking device naming:
Passed.
Checking local filesystems
Mounting / (root)
Cannot find boot filesystem mount point
mountroot: Please correct the mount problem and reboot

I tried running bcheckrc and got the same error message. The following is my /etc/fstab file:

root_domain#root / advfs rw 0 0
/proc /proc procfs rw 0 0
usr_domain#usr /usr advfs rw 0 0

The root domain is currently mounted and I could successfully mount the usr domain as well.

Any ideas on how I can fix this?

Please let me know if i need to try anything else,its very urgent for me to get this system up.Thank you.

Re: Boot Problem

A Lakshmanan — Thu, 23 Jul 2009 19:58:03 GMT

In addition to that I am getting the following error:
INIT: Command is respawning too rapidly. Check for possible errors.
id: esmd "/usr/sbin/esmd /dev/null 2>&1"

INIT: Command is respawning too rapidly. Check for possible errors.
id: cons "/usr/sbin/getty console console vt100"

Re: Boot Problem

A Lakshmanan — Thu, 23 Jul 2009 22:18:24 GMT

Have anyone tried to rebuild a new kernel ?
In single user mode, sysconfig -s - shows nothing. sysconfigtab and sysconfigdb -l are perfect, but while booting both both vmunix and genvmunix are not able to get these attribute values.

Re: Boot Problem

Rob Leadbeater — Thu, 23 Jul 2009 23:06:25 GMT

Hi,

Go back to the beginning...

Exactly what did you change when you "changed kernel parameter" ?

The errors "...attributes not set in subsystem..." should not stop the system booting. They're just an indication of typos in /etc/sysconfigtab.

What's the hardware configuration ? Clustered ?

Cheers,

Rob

Re: Boot Problem

A Lakshmanan — Fri, 24 Jul 2009 06:29:46 GMT

Hi thanks for your response.
The system is not clustered.I have replaced it with the original sysconfigtab.All I have is usuable single user mode.
I believe syconfig with wrong parameters changed the setting of running kernel.I dont have a log to tell you the exact parameters,sorry.
When the system boots it checks ./vmunix or /gemvmunix as per the selection and both kernel are not allowing me to login.
/vmunix or /gemvmunix are not updating the current information from sysconfigtab.
Do you think is it possible for me to replace these two files from tape or to build a new kernel ?

Re: Boot Problem

Rob Leadbeater — Fri, 24 Jul 2009 11:40:03 GMT

Hi,

I'm not entirely sure what's gone wrong, but you might want to try booting from the generic kernel, and rebuilding a new one.

P00>>> b -fl s -fi genvmunix

Once at single user,

# mountroot
# mount /usr
# mount /var
# doconfig

Once the kernel has been built, you will need to copy it to /

Hope this helps,

Regards,

Rob

Re: Boot Problem

A Lakshmanan — Fri, 24 Jul 2009 14:22:42 GMT

Just done a rebuild, same issue.It looks like problem is not with the kernel.
Mounting / ( root )
Cannot find boot filesystem mount point.
mountroot:please correct the mount problem and reboot.I am not sure how to fix this issue.

did

#dn_setup â sanity_check - passed
#dn_setup â init
#dsfmgr â K
#dsfmgr â v is successful
#disklabel â r dsk0 and dsk1 are fine.
#/etc/fstab and inittab looks fine.

Re: Boot Problem

A Lakshmanan — Fri, 24 Jul 2009 15:11:38 GMT

From the single user mode I found the important consvar attributes are not set.
I tried
consvar -g booted_dev
booted_dev =
consvar -s boot_dev dsk0
consvar -a
No idea these changes are not effective after a boot.

Re: Boot Problem

Ninad_1 — Fri, 24 Jul 2009 15:30:29 GMT

Hi Alagappan,

Not sure if this could be a cause ?
Have you checked /etc/fdmns ? Are the links pointing correctly to the proper device names ?

Regards,
Ninad

Re: Boot Problem

A Lakshmanan — Fri, 24 Jul 2009 16:23:54 GMT

Hi Nindad

I have tried that.Its same.Thanks

Re: Boot Problem

Rob Leadbeater — Fri, 24 Jul 2009 18:17:06 GMT

Hi,

I don't think you can set booted_dev. That variable is set as the system boots to tell you what device the system booted from.

The important one is bootdef_dev (Default Boot Device).

Can you post the output of

P00>>> show dev
P00>>> show boot*

Cheers,

Rob

Re: Boot Problem

A Lakshmanan — Sat, 25 Jul 2009 06:17:34 GMT

Hi Rob

I work straight from the console, so cant provide the output.But I can tell you this, I have two internal disk, dka0 is the OS disk.And that is set bootdef_dev as default.
When the OS loads, it says found valid boot block. And /etc/fdmns root_domain points to dsk0a which is correct.

Thanks
AL

Re: Boot Problem

A Lakshmanan — Sat, 25 Jul 2009 06:27:25 GMT

Checking local filesystems
expr: syntax error
Mounting Filesystem
Cannot find boot filesystem mount point
mountroot: Please correct the mount problem and reboot

After checking local filesystem, there is an error, not sure whether this is stopping.

Re: Boot Problem

Rob Leadbeater — Sat, 25 Jul 2009 11:39:55 GMT

Hi,

Based on "expr: syntax error" I'll take a guess that there's a typo in /etc/fstab

Cheers,

Rob

Re: Boot Problem

A Lakshmanan — Mon, 27 Jul 2009 14:45:59 GMT

I have recovered the OS from the tape.Its fixed now.Thanks.