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#1 (**permalink**) 01-17-2008, 05:33 AM

Situation is this: HP c3700 workstation with two 18GB disks. HP-UX 11i
v1 has been installed with VERITAS VxFS striped over both disks. I
removed some kernel drivers, and after a kernel rebuild and the
following reboot the machine crashes.

I bootet of the HP-UX installation CD and tried to do a recovery
(replace the kernel). But the recovery script only lets me choose
between both disks, it doesn't recognize that this is a stripe set.

Can anyone give me a helping hand here?

Benjamin

#2 (**permalink**) 01-17-2008, 05:33 AM

Benjamin Gawert wrote:
> Situation is this: HP c3700 workstation with two 18GB disks. HP-UX 11i
> v1 has been installed with VERITAS VxFS striped over both disks. I
> removed some kernel drivers, and after a kernel rebuild and the
> following reboot the machine crashes.
>
> I bootet of the HP-UX installation CD and tried to do a recovery
> (replace the kernel). But the recovery script only lets me choose
> between both disks, it doesn't recognize that this is a stripe set.
>
> Can anyone give me a helping hand here?

Did you save the previous kernel when you build a new one?
If so, tell the bootloader to boot that one instead (i.e.
if you saved it to /stand/vmunix.prev do "hpux vmunix.prev"
at the ISL prompt.

Don

(I thought mk_kernel does this by default - so if even if
you didn't explicitly do it.. try "hpux ls" at the boot
loader and see if there's a vmunix other than the rebuilt
kernel...)

#3 (**permalink**) 01-17-2008, 05:34 AM

* Don Morris:

> Did you save the previous kernel when you build a new one?

Yes.

> If so, tell the bootloader to boot that one instead (i.e.
> if you saved it to /stand/vmunix.prev do "hpux vmunix.prev"
> at the ISL prompt.

That did the trick, thank you very much!

Benjamin

#4 (**permalink**) 01-17-2008, 05:36 AM

Benjamin Gawert <bgawert@gmx.de> writes:

> * Don Morris:
>
> > Did you save the previous kernel when you build a new one?
>
> Yes.
>
> > If so, tell the bootloader to boot that one instead (i.e.
> > if you saved it to /stand/vmunix.prev do "hpux vmunix.prev"
> > at the ISL prompt.
>
> That did the trick, thank you very much!

You know you were dammed lucky? ,_) Otherwise you'd have to reinstall or
connect the disks to another system. BTW: I wonder how kernel boot from
stzriped disks works if the needed drivers are in the kernel that has to be
loaded first...

>
> Benjamin

#5 (**permalink**) 01-17-2008, 05:36 AM

* Ulrich Windl:

>> That did the trick, thank you very much!
>
> You know you were dammed lucky? ,_) Otherwise you'd have to reinstall or
> connect the disks to another system.

Well, since this machine is just a personal toy (I'd never ever mess
around with something like that on a production machine, especially not
w/o a proper backup) a reinstall would not have been too bad. But
getting it fixed saved me downloading the latest HP-UX patch sets again ;-)

> BTW: I wonder how kernel boot from
> stzriped disks works if the needed drivers are in the kernel that has to be
> loaded first...

Me, too. At least the recovery part of the installation media doesn't
seem to be able to access striped disks...

Benjamin

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How to recover HP-UX system with broken kernel