[gPXE] Booting FreeDOS - beginner question

[Ruzsinszky Attila]

Hi,

I want to test, setup, learn, use a virtual environment.

I've got a very simple scenario. Booting a simple FreeDOS.

FreeDOS is on an iSCSI target which comes from FreeNAS.
DHCP server is a SuSE 9.3 Linux.
Client is a 4.x Virtualbox which is running under WinXP.

Almost everything is ready but when I try to boot FreeDOS,
I got: Error loading operating system.
Of course I'm not sure the iSCSI target image is correct. I
did it half a year before.

The messages when the system is booting:

Loading ROM image .......
gPXE initialising devices...

gPXE 1.0.1 -- Open Source Boot Firmware -- http://etherboot.org
Feature: AoE HTTP iSCSI DNS TFTP bzImage COMBOOT ELF Multiboot NBI PXE PXEXT

net0: 08:00:27:2c:61:a6 on PCI00:03:0 (open)
   [Link:up, TX:0 TXE:0 RX:0 RXE:0]
DHCP (net0 08:00:27:2c:61:a6).... ok
net0: 192.168.52.22/255.255.255.0 gw 192.168.52.254
Booting from root path
"iscsi:192.168.52.60::::iqn.2010-12.hu.mavrt.bbf.fc:fdos-disk"
Registered as BIOS drive 0x80
Booting from BIOS drive 0x80
Error loading operating system

I "mounted" that disk under XP with iSCSI initiator without problem.
The image was create from balder10 image and there are just a KERNEL.SYS and
some inrelevant files and directories. I think the problem is related to the
disk image which was created from balder10 image.
The question: how can I make a bootable FreeDOS image under Linux and
how can I check it in a virtual environment?

The further goal would be a boot server setup installing Linuxes and other
OSs from network with PXE.

TIA,
Ruzsi