[syslinux] Upgrading PXE initrd.img with new kernel and drivers

[Steven Hajducko]

Quite simply, HOW? :)

I have the pxeboot initrd.img from the RH 3.0 AS CD's.  We need to put a new
cciss.o driver from HP into this initrd.img.  Unforunately, the modules in
the pxeboot initrd.img we have are 2.4.21-4 and our new driver is compiled
for 2.4.21-15, so we have to upgrade everything.

I downloaded the kernel-BOOT-2.4.21-15 RPM and installed that, so I have all
those drivers.  My question is:  Can I use the 2.4.21-4 initrd.img and just
replace the entire modules.cgz with all the modules from the BOOT rpm and
our new cciss.o in there?  I'm not sure what exactly the difference is
between the PXE version of initrd.img and regular boot initrd.img, but a
simple "find ./ -type f" shows that the PXE one has a lot more files and I'm
not too sure whether those are kernel dependant or not and if so, where do I
get them from?  Also, I believe I have to update stage2.img in the base
directory that will be downloaded, but I don't know for sure and if someone
could confirm that, I would appreciate it.

Here's an example of our differences.

2.4.21-15
./init_nonboot/lib/scsi_mod.o
./init_nonboot/lib/sd_mod.o
./init_nonboot/lib/cciss.o
./init_nonboot/lib/lvm-mod.o
./init_nonboot/lib/jbd.o
./init_nonboot/lib/ext3.o
./init_nonboot/bin/nash
./init_nonboot/bin/insmod
./init_nonboot/bin/vgwrapper
./init_nonboot/bin/vgscan
./init_nonboot/bin/vgchange
./init_nonboot/linuxrc

2.4.21-4 ( our PXE initrd.img from the RH3.0AS cd )
./init/modules/module-info
./init/modules/pcitable
./init/modules/modules.dep
./init/modules/modules.pcimap
./init/modules/modules.cgz
./init/sbin/loader
./init/sbin/init
./init/etc/terminfo/l/linux
./init/etc/terminfo/x/xterm
./init/etc/terminfo/v/vt100
./init/etc/terminfo/v/vt100-nav
./init/etc/terminfo/b/bterm
./init/etc/passwd
./init/etc/arch
./init/etc/keymaps.gz
./init/etc/screenfont.gz
./init/etc/lang-table
./init/etc/loader.tr
./init/etc/font.bgf.gz
./init/etc/pcmcia/config
./init/etc/ramfs.img
./init/.buildstamp
./init/.profile

Any help is appreciated.  At the moment, we're prevented from installing RH
on any of our new hardware until this starts working.

Thanks,

sh