[syslinux] Syslinux with two-disk set (boot+root )

Mike Jones mjj9 at email.byu.edu
Thu Aug 22 17:19:44 PDT 2002

> prompt_ramdisk is a kernel option, not a SYSLINUX option.  The kernel
> should support it if suitable configured.

What I meant was, if I add "prompt_ramdisk=1" to my append options in
syslinux.cfg, the boot fails (unable to locate my ramdisk file) before I get
a prompt for the disk.  Using the same kernel and the same append options
with lilo works, however.

> I had this problem too, but got round it by using etherboot roms
> on non-pxe
> clients (or an etherboot disk).  Using ISC's dhcpd 3.x you can put in
> conditionals which offer a PXE (pxelinux) image or a tagged image
> (made using
> mknbi-linux) for etherboot.

Unfortunately for me, I can't use etherboot -- I'm using a Win2k DHCP
server, and I understand that Microsoft DHCP doesn't know how to talk to

RGBF.exe (Remote Boot Floppy Generator) might work.  It's actually from
Microsoft (win2k), though it was meant to work with RIS and I'm not sure if
I can get it to work with my TFTP server...  We'll see.

Yes, I could (and probably will) just use lilo.  I was hoping to use
syslinux, though <sigh>.  But I appreciate the fact that you have other
things on your plate.


> -----Original Message-----
> From: H. Peter Anvin [mailto:hpa at zytor.com]
> Sent: Thursday, August 22, 2002 3:39 PM
> To: Mike Jones
> Cc: syslinux at zytor.com
> Subject: Re: [syslinux] Syslinux with two-disk set (boot+root )
> Mike Jones wrote:
> > Hello there.
> >
> > I use (and love!) your syslinux software - also pxelinux and
> soon isolinux.
> > I have been using it for build deployment purposes for some time now,
> > however I recently updated my kernel and added some additional
> drivers to
> > it, making it too large to fit on a floppy along with my
> ramdisk.  This is
> > no problem for my PXE-enabled clients, of course, but for those machines
> > that do not support PXE, I can no longer use syslinux because
> it apparently
> > does not support the "prompt_ramdisk" option so that I can swap
> in my second
> > floppy disk.
> >
> > Do you have any plans to include this functionality in a later release?
> >
> prompt_ramdisk is a kernel option, not a SYSLINUX option.  The kernel
> should support it if suitable configured.
> I have been considering implementing some kind of multi-floppy support
> in syslinux, but realistically, it probably won't happen unless someone
> ends up paying me to get it done (I have too many projects on my hands
> right now, which are more interesting and therefore higher
> priority to me.)
> This is yet another reason why I'd like to see a PXE-on-a-floppy
> implementation.  Someone said there is actually a way to coax one out of
> W2K, but that obviously isn't acceptable for most users.
> 	-hpa

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