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Re: Debian on Power 740: yaboot can't open device




Make sure, you select Power6 compat mode in Processing TAB for this LPAR.
Otherwise, installer will install 32-bit kernel, which produces errors like this.

After installation, you can revert back to Power7 mode.

Gasha

On 09/12/2011 04:25 PM, Benedikt Wegmann wrote:
Thanks everybody for you quick replies.
I think I understand the problem better now.

I followed the guids and instructions on how to update yaboot from
within the installation process. It has worked in so far as that yaboot
now gives a version of 1.3.16 when booting the lpar. It now also seems
to find and read the kernel image.
However, as soon as Linux starts booting the console gets filled with
error messages like the ones below (two messages each from different
boots).

I have never seen this kind of error with Linux before can't make heads
or tail whether it is related to yaboot, the kernel the hardware or
whatnot. Any ideas?
As always, booting rescue64 from the Debian install disk and chroot in
the system is all fine, no problems. This is the most confusing aspect.

Thanks for all the advise and help.
It would benefit my project a lot if I could put this Linux server on an
lpar instead a seperate machine.

Best regards,
Benedikt


*****
error messages:
**

Detected bad memory access to address: ffffffffff0f8b98
Package path = /aliases
Return Stack Trace
------------------
@  - c3e530
find-method  - c48b9c
(poplocals)  - c3c9e8
$call-method  - c48c54
(poplocals)  - c3c9e8
key-fillq  - c491dc
?xoff  - c492e8
(poplocals)  - c3c9e8
(stdout-write)  - c49914
(emit)  - c49a14
space  - c47970
quit  - c4cc98
quit  - c4cb40
_syscatch  - c50720
_syscatch  - c50720
invalid pointer - 388600017d484378
invalid pointer - 5508043eb10316b8
invalid pointer - 7d0c29ae81230008
invalid pointer - a14316b8554ac23e
invalid pointer - 7d4931ae90830014


Detected bad memory access to address: ffffffffff0f8b98
Package path = /packages/boot-mgr
Return Stack Trace
------------------
@  - c3e530
find-method  - c48b9c
(poplocals)  - c3c9e8
$call-method  - c48c54
(poplocals)  - c3c9e8
key-fillq  - c491dc
?xoff  - c492e8
(poplocals)  - c3c9e8
(stdout-write)  - c49914
(emit)  - c49a14
space  - c47970
quit  - c4cc98
quit  - c4cb40
_syscatch  - c50720
_syscatch  - c50720
invalid pointer - 388600017d484378
invalid pointer - 5508043eb10316b8
invalid pointer - 7d0c29ae81230008
invalid pointer - a14316b8554ac23e
invalid pointer - 7d4931ae90830014


*****






Am Mittwoch, den 07.09.2011, 16:27 +0300 schrieb Gasha:
short:
install yaboot 1.3.16 (from latest/unstable)

long:
see e-mail from 24.08.2011 in list archives
subject:
Debian 6.0.2 on Power7 LPAR - it work - little howto

Gasha

On 09/07/2011 03:56 PM, Benedikt Wegmann wrote:
Hello everybody!

I'm in the process of installing Debian Stable on a Power 740 system.
I'm familiar with the installation on x86 systems and the installation
process of Debian ppc thus looked familiar.

I installed using the "install64" option. Disk partition was "guided -
use whole disk, with separate /home". Installation concluded
successfully but after a reboot yaboot loads and offers the choice of
"Linux" and "old" - as per standard configuration I learned - but
booting "Linux" fails:

Config file read, 4096 bytes

Welcome to yaboot version 1.3.13
Enter "help" to get some basic usage information
boot:
    Linux                      old
boot:
Please wait, loading kernel...
Can't open device</vdevice/v-scsi@30000002/@1:0>
/vdevice/v-scsi@30000002/@1:2,/boot/vmlinux: Unable to open file, Invalid device
boot:

The device however is valid - I can see it in the SMS menu - and I can
successfully boot into the rescue system via the Debian cd ("rescue64")
and subsequently chroot into my installed system, no problem.
However, I can never boot straight into it with yaboot.

Some information about the system:

root@debian:/# cat /proc/partitions
major minor  #blocks  name

     8        0    6291456 sda
     8        1       7168 sda1
     8        2    1902592 sda2
     8        3          1 sda3
     8        5     262144 sda5
     8        6    4115456 sda6


root@debian:/# cat /etc/yaboot.conf
## yaboot.conf generated by debian-installer
##
## run: "man yaboot.conf" for details. Do not make changes until you have!!
## see also: /usr/share/doc/yaboot/examples for example configurations.
##
## For a dual-boot menu, add one or more of:
## bsd=/dev/hdaX, macos=/dev/hdaY, macosx=/dev/hdaZ

boot="/dev/disk/by-id/scsi-SAIX_VDASD_00f6c18700004c0000000130f6e6a926.4-part1"
device=/vdevice/v-scsi@30000002/@1
partition=2
root="UUID=1017dfc6-257e-433f-9247-6676b732630a"
timeout=50
install=/usr/lib/yaboot/yaboot
enablecdboot

image=/boot/vmlinux
          label=Linux
          read-only
          initrd=/boot/initrd.img

image=/boot/vmlinux.old
          label=old
          read-only
          initrd=/boot/initrd.img.old
root@debian:/#


root@debian:/# mount
/dev/sda2 on / type ext3 (rw,relatime,errors=remount-ro,data=ordered)
/dev/sda6 on /home type ext3 (rw,relatime,errors=continue,data=ordered)
tmpfs on /dev type tmpfs (rw,relatime,mode=755)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)


root@debian:/# ls -lR /boot/
/boot/:
total 18364
-rw-r--r-- 1 root root  1214811 Jun 14 14:44 System.map-2.6.32-5-powerpc-smp
-rw-r--r-- 1 root root    93218 Jun 14 14:44 config-2.6.32-5-powerpc-smp
lrwxrwxrwx 1 root root       31 Sep  7 09:44 initrd.img ->   initrd.img-2.6.32-5-powerpc-smp
-rw-r--r-- 1 root root 10216212 Sep  7 09:44 initrd.img-2.6.32-5-powerpc-smp
lrwxrwxrwx 1 root root       28 Sep  7 09:44 vmlinux ->   vmlinux-2.6.32-5-powerpc-smp
-rw-r--r-- 1 root root  7233739 Jun 14 14:44 vmlinux-2.6.32-5-powerpc-smp


root@debian:/# uname -a
Linux debian 2.6.32-5-powerpc64 #1 SMP Tue Jun 14 11:04:52 UTC 2011 ppc64 GNU/Linux


I'm at a loss as to what the problem might be. The installation looks
fine within the chroot environment, I just can't get it to boot.

I also tried an install as per the wiki site
(https://www.ibm.com/developerworks/mydeveloperworks/wikis/home?lang=en#/wiki/Debian%206%20on%20Power7%20LPAR/page/Start%20installation) with updating yaboot during the install as described but without lick. The only aspect where my install differs is with regard to the use of multipath. I use a plain old scsi disk and only have one VIOS in the machine.

Any suggestions would be much appreciated.
Thanks!






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