How to boot from yaboot 'boot' prompt

[Nathan Lynch]

Shuqing Yang wrote:
> Hi all,
> 
> I'm using an IBM p-series machine. Because of yaboot configuration
> file error, the machine can not boot. Now I only can get a "boot:'
> prompt. I know where the kernel and initrd image locate.
> 
> I tried as following:
> 
> boot:/pci at 8000000f8000000/pci at 1/pci1014,028C at 1/scsi at 0/sd at 1,0:2,/vmlinuz-2.6.16-1.2289_FC6
> root=/dev/sda3
> 
> This can load the kernel but can not identify /dev/sda3. I think this
> is due to lack of some drivers. So I append
> 'initrd=/initrd-2.6.16-1.2289_FC6.img' after the command line. But it
> doesn't work either. Kernel doesn't load ramdisk at all.
> 
> How do I load them from the yaboot prompt ?

I don't believe that you can specify an initrd at the boot: prompt.
Yaboot will pass kernel arguments such as "root=...", but "initrd=..."
is not a kernel argument.

Looks like you have to recover the system some other way.

It would be nice if yaboot allowed the user to specify an initrd on
the command line.