How to boot from yaboot 'boot' prompt

Nathan Lynch ntl at
Wed Sep 27 03:27:09 EST 2006

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.

More information about the Yaboot-users mailing list