topic Kernel build in Operating System - HP-UX

Kernel build

Yann Lambret — Tue, 21 Mar 2006 10:53:41 GMT

Hi all,

I need to generate a new kernel on a HP-UX 11.11 server.

I'd like to know if it's safe enough to save both /stand/vmunix and /stand/system or if I have to backup more files in order to put things back the way they were. I checked HP docs and I couldn't get accurate information about this specific point.

Thanks for your help.
Yann

Re: Kernel build

Deoncia Grayson_1 — Tue, 21 Mar 2006 10:59:39 GMT

Making sure you have a copy of /stand/vmunix and /stand/system before you make any changes because if you cannot boot off your newly compiled kernel then you can always boot off the old one by interrupting the boot process and interacting with your IPL to boot off your saved copy of /stand/vmunix.prev.

Re: Kernel build

Arunvijai_4 — Tue, 21 Mar 2006 11:01:39 GMT

Hello Yann,

You can check this thread for how to rebuild the kernel, read Michael Tully's reply,

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=63788

-Arun

Re: Kernel build

A. Clay Stephenson — Tue, 21 Mar 2006 11:08:15 GMT

Normally, yes, those two files are all you need; however, if in your kernel build you also have custom device drivers (not common these days) then you would also need the system.d directory and possibly the build directory.

In general, as long as you have a vmunix.prev that is known to be bootable, you can safely boot if things go terribly wrong. Normally, vmunix.prev gets overwritten with each kernel build so its a good idea to have something like "vmunix.SAFE" as a known good fallback. Once you have copied your current vmunix to vmunix.SAFE, the best possible way of insuring that you can put things back just like they were is to tar or cpio the entire /stand directory tree.

Re: Kernel build

Yann Lambret — Tue, 21 Mar 2006 11:19:42 GMT

Thanks for your answers. I close this thread.

Re: Kernel build

Yann Lambret — Tue, 21 Mar 2006 11:23:03 GMT

Ok, this time I REALLY close this thread :)