Re: [BProc] Qn: Slave reboot due to monte protected mode

[Vipul D. <vip...@ya...>]

Thanks Michal.

I used your suggestion, and tried booting directly off
floppy and then disk on slave from phase 2 kernel and
initrd image. However,  as soon as control passes to
this kernel the system resets to the BIOS - I can't
even see the message that gets printed momentarily
before the reset. 

So, it looks like a beoboot issue for generating the
kernel. The same kernel image is running fine on the
master node, of course with a different initrd image.
Has anyone seen this?

Thanks.
Vipul 


--- Michal Jaegermann <mi...@ha...> wrote:

> On Mon, Aug 16, 2004 at 06:58:07PM -0700, Vipul
> Deokar wrote:
> >
> > When beobooting off a floppy, my slave node gets
> into
> > a reboot loop. It manages to boot off the SYSLINUX
> > image, successfully RARPs IP addr off the master,
> and
> > downloads the phase 2 image but then fails with
> the
> > following error message. 
> > 
> > monte: entry point (protected mode): 0x100000
> > ...rebooting in 2 seconds...
> 
> If you can boot from an "external" media, be that a
> floppy, CD, a
> local disk on a node or a network (say via PXE) then
> you can as well
> boot a phase 2 kernels directly.  Just make with
> 'beoboot' script
> separate kernel and its initrd and use that.
> 
> I found on various occasions kmonte hack iffy and/or
> not working at
> all.  In particular at least in its current state it
> does not seem
> to have much chance on 2.6 kernels. There kexec
> mechanism could be
> used instead but this is still a work-in-progress. 
> OTOH on nowadays
> x86 boards a PXE client in BIOS is something to be
> rather expected.
> 
> The main attraction of this two-phase boot is that
> if you change
> your kernel then you do not have to send it to
> nodes, instead of
> loading it as a phase 2 kernel, where such things
> like local disks
> may not even exist (but on Alphas which had to boot
> via ARC/milo
> this was the only way I found to get nodes going). 
> If you can boot
> over a network anyway then what is the difference? 
> Load what
> you really want to run from your boot server and be
> done with it.
> 
> A tip - when PXE-booting that way I am setting up
> DHCP and tftp
> on one network and configure clustermatic to use the
> same
> hardware interface but on an alias on another
> network so these
> two are independent.  DHCP will not run on an alias,
> so there
> is not much choice here, but clustermatic will.
> 
>    Michal
>