[vox-tech] need to debug boot crash

[eric nelson]

Charles Polisher wrote:

> On Sun, Mar 24, 2002 at 09:49:56PM -0800, eric nelson wrote:
> > ME wrote:
> >
> > > On Sun, 24 Mar 2002, eric nelson wrote:
> > > > Its not panicking.  I'm doing an nfs mount of the os, and something went
> > > > wrong init the initscripts.  The shift-pageup is a really good idea, I didn't
> > > > know about that.  The problem is that so many errors spewed out that I
> > > > coulldn't get far enough back.
> > >
> > > You doing network booting of a client with an NFS root from a server?
> > >
> > > We have about 80 diskless workstations doing net-booting here from the
> > > same "ro" NFS export. What specific errors are being reported?
> >
> > First, something about mount program didn't pass correct address, then
> > RPC: sendmsg returned error 101
> > nfs: RPC call returned error 101
> > .... over and over
> >
> > There are so many errors, that I can't scroll back.  I'll need to redo the kernel
> > w/ the option Peter Jay Salzman mentioned.
> >
> > I'm not doing the kind of mount straight from the bios, but I want to learn how to
> > do that one, later.  I have a boot floppy which loads a kernel, then gets an
> > address from dhcp server, then mounts on nfs.  I'm sure the problem is in init
> > scripts, or fstab or something.
> >
> > It's good to know someone is doing this, it's a great approach.
>
> If you can snoop the wire (from another box), the trace
> might diagnose the problem.  Something like:
>
>         # tcpdump -i eth0 -nvvvxl -s100 host foo
>
> where foo is the troubled host. Etherreal or some such utility might
> be easier to interpret. Anyway, if you can watch the conversation
> taking place between the host and client, the problem sometimes
> jumps right out - eg., if it's an authentication error.
>

I'll be able to set this up at work, once I get through some tasks of a more mundane
nature.  I'm sure that this approach will help understand the whole process.
Appreciate the idea. ;~)

>
> HTH,
>
> Chuck Polisher
> --
> The best way to get information on Usenet is not by asking a question, but
> by posting inaccurate information.
>
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