Syslinux - Apr 2006 - Booting Live Cd over PXElinux - need help

Hi,

Normally i doesn't choose this way to solve problems, but i need a fast 
and good help because it's really important to me.
I would like to boot a LIVE CD, called SLAX (depending on SLACKWARE) 
over PXElinux.

So i've got a server with dhcp,tftp and pxelinux. In the tftp folder are 
the  SLAX files. Now i would like to boot from a client this LIVE CD. 
Because this is a LIVE CD i can't tell pxelinux.cfg that it should boot 
the kernel and append initrd or? All works fine but during booting there 
appends a kernel panic error taht he can'f mount a root FS.....

This is a short example of my config:

LABEL Test
kernel /test/boot/vmlinuz
append initrd=/test/boot/initrd.gz

I also tried with kernel memdisk. But there it hangs up.
But i think it can't work as i'm doing now.
As i have seen that SLAX is generated with ISOlinux, it this would help.
I also heard that there is a way over NFS.....

So i'm really glad about all help and examples that this will work fine.
And sorry again for choosing this way.

Markus Humm

justStormY wrote:
> Hi,
> 
> Normally i doesn't choose this way to solve problems, but i need a fast
> and good help because it's really important to me.
> I would like to boot a LIVE CD, called SLAX (depending on SLACKWARE) 
> over PXElinux.
> 
> So i've got a server with dhcp,tftp and pxelinux. In the tftp folder
are
> the  SLAX files. Now i would like to boot from a client this LIVE CD. 
> Because this is a LIVE CD i can't tell pxelinux.cfg that it should boot
> the kernel and append initrd or? All works fine but during booting there 
> appends a kernel panic error taht he can'f mount a root FS.....
> 
There isn't a single way to do that, because it's depends on how the 
initrd on the livecd is constructed.  I suggest talking to the SLAX people.

	-hpa

> -----Original Message-----
> From: syslinux-bounces at zytor.com 
> [mailto:syslinux-bounces at zytor.com] On Behalf Of H. Peter Anvin
> Sent: 22 April 2006 18:42
> To: justStormY
> Cc: syslinux at zytor.com
> Subject: Re: [syslinux] Booting Live Cd over PXElinux - need help
> 
> justStormY wrote:
> > Hi,
> > 
> > Normally i doesn't choose this way to solve problems, but i need a
> > fast and good help because it's really important to me.
> > I would like to boot a LIVE CD, called SLAX (depending on 
> SLACKWARE) 
> > over PXElinux.
> > 
> > So i've got a server with dhcp,tftp and pxelinux. In the 
> tftp folder 
> > are the  SLAX files. Now i would like to boot from a client 
> this LIVE CD.
> > Because this is a LIVE CD i can't tell pxelinux.cfg that it should
> > boot the kernel and append initrd or? All works fine but during 
> > booting there appends a kernel panic error taht he can'f 
> mount a root FS.....
> > 
> 
> There isn't a single way to do that, because it's depends on how
the
> initrd on the livecd is constructed.  I suggest talking to 
> the SLAX people.
> 
> 	-hpa
> 
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> 
Look at the initrd, and the linuxrc script.

It probably contain some code to find the cdrom and mount it by doing something
like this:

	for x in hda hdb hdc hdd                        
		do  
        		mount -t iso9660 /dev/${x} /cdrom
		        if [ "$?" == "0" ]                          
		        then            
		                CDROM=${x}                          
		                break                     
		        fi          
		done    




If the Kernel support NFS, you can probably replace the first part where it
looks for the CDROM with code that mount an NFS share SLAX files in it.


//
Harald Jens?s