Unable to mount /dev/root

[Igor V. Ruzanov]

Adam,

> i.e. add 'ioport [ 0x0cf8, 0x0cff ]' to the loader config script
> to allow access to the PCI ports. That should fix it. For other devices
> this works equally.
>

I've allmost won at the problem after 'learning' of 'weird' strings
loader  | vmlinuz-2.6.24-l4,#f: WARNING: Can't map I/O space, ROOT denies page
loader  : (result=00004000)
loader  | vmlinuz-2.6.24-l4,#f: Not allowed to perform any I/O

for some time and remember about Fiasco configuration. There is the 
interesting option:
[ ] Enable I/O port protection

that i activated it before. And when i unset this option (as it looks like 
above) and rebuild Fiasco, sd_mod had determined partinions on sda 
drive during L4Linux boot. Now everything is going fine untill boot 
process gets stuck when the system perfoms some I/O on ata-channels. But i 
think this problem lays in plane of more simple tracings of right 
solutions.. at least i hope;)

Thank you for your HELP!!!