Problem booting on IBM e Server (xSeries 22)

Problem booting on IBM e Server (xSeries 22)

[Ky Srinivasan]

I am having trouble booting domain 0 on this IBM hadware (SCSI 
disk controller - aic7xxx). On the way up,  domain 0 is failing to 
mount root. This happens with both the 2.4 as well as the 2.6 
kernel. The xen tree (along with the 2.4/2.6 kernels) is a few days 
old. I have  SuSe 9.0 installed on this box. Following are the lines
from my grub configuration file:

title Xen 2.0 / XenoLinux 2.6.7
        kernel (hd0,1)/boot/xen.gz dom0_mem=431072 com1=115200,8n1
        module (hd0,1)/boot/vmlinuz-2.6.7-xen0 root=/dev/sda2
console=tty0  console=ttys0

Any help would be greatly appreciated.

Regards,

K. Y


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Re: Problem booting on IBM e Server (xSeries 22)

[Ian Pratt]

> I am having trouble booting domain 0 on this IBM hadware (SCSI 
> disk controller - aic7xxx). On the way up,  domain 0 is failing to 
> mount root. This happens with both the 2.4 as well as the 2.6 
> kernel. The xen tree (along with the 2.4/2.6 kernels) is a few days 
> old. I have  SuSe 9.0 installed on this box. Following are the lines
> from my grub configuration file:
> 
> title Xen 2.0 / XenoLinux 2.6.7
>         kernel (hd0,1)/boot/xen.gz dom0_mem=431072 com1=115200,8n1
>         module (hd0,1)/boot/vmlinuz-2.6.7-xen0 root=/dev/sda2
> console=tty0  console=ttys0
> 
> Any help would be greatly appreciated.

I think you need a capital 's' in ttyS0 if you want serial
output. Also, I've noticed that linux 2.6 seems to ignore
multiple console= atributes, so I'd stick to just one.

The default 2.6.7 xen/linux kernel build has an aic7xxx driver
in, but I'm not sure how much testing its had. The 2.4.26 kernel
has received much wider testing, so you may want to stick with
that to get things up and running.

If you're using the unstable tree you'd be well advised to 'bk
pull; make world' to sync with the repository as there's been a
number of bug fixes in the last couple of days.

You might want to try adding 'ignorebiostables' or 'noacpi' to
the xen command line to see if that makes a difference. 

The other thing to watch out for is that we don't support devfs,
so your fstab must contain proper /dev/sdXX entries rather than
LABEL=/. (We plan to add udev functionality in due course.)

If you can connect something to the machine's serial port and
capture the boot messages we'll be in a much better position to
see what's going wrong. Capturing the output of booting an
equivalent native linux kernel for comparison can be useful too.

I'd be very surprised if we couldn't get this machine going.

Ian



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