RE: trouble with pygrub after upgrade

[John Hayward <john.hayward%wheaton.edu@localhost>]

This is now resolved.
pygrub was unable to read the disk images which were ext4.  Dumping the ext4 
disk images and restoring to ext2 disk images allowed pygrub to be able to read 
these disk images.

You can go back to your regularly scheduled program.
johnh...
________________________________________
From: port-xen-owner%NetBSD.org@localhost [port-xen-owner%NetBSD.org@localhost] 
on behalf of John Hayward [john.hayward%wheaton.edu@localhost]
Sent: Monday, July 09, 2012 1:11 PM
To: port-xen%netbsd.org@localhost
Subject: trouble with pygrub after upgrade

Dear NetBSD-Xeners,
Yesterday I did an upgrade to NetBSD-5.1.2 and had a few issues along the way:

The netbsd-XEN3_DOM0 kernel did not automatically find the wd0a disk as root - 
I had to build a kernel with root on wd0a.

My bigger problem is that some of my linux vms did not come up - those which 
did not have pygrub specified came up fine.  Those which used pygrub did not 
come up.

The error in terminal was:
xm create bio-Ubuntu64-10.04
Using config file "./bio-Ubuntu64-10.04".
Error: Boot loader didn't return any data!

The errorr in xend.log was:
[2012-07-09 12:13:58 213] DEBUG (XendDomain:449) Adding Domain: 14
[2012-07-09 12:13:58 213] DEBUG (XendDomainInfo:2149) 
XendDomainInfo.initDomain: 14 2
56
[2012-07-09 12:13:58 1764] DEBUG (XendBootloader:113) Launching bootloader as 
['/usr/
pkg/bin/pygrub', '--args=root=/dev/hda1 ro ip=:127.0.255.255::::eth0:dhcp 
fastboot ra
id=noautodetect', '--output=/var/run/xend/boot/xenbl.5941', '-q', 
'/BioXen/fs/BioRoot
64.fs'].
[2012-07-09 12:13:58 213] ERROR (XendBootloader:213) Boot loader didn't return 
any da
ta!
[2012-07-09 12:13:58 213] ERROR (XendDomainInfo:467) VM start failed
Traceback (most recent call last):
  File "/usr/pkg/lib/python2.7/site-packages/xen/xend/XendDomainInfo.py", line 
447, i
n start
    XendTask.log_progress(31, 60, self._initDomain)
  File "/usr/pkg/lib/python2.7/site-packages/xen/xend/XendTask.py", line 209, 
in log_
progress
    retval = func(*args, **kwds)
  File "/usr/pkg/lib/python2.7/site-packages/xen/xend/XendDomainInfo.py", line 
2151,
in _initDomain
    self._configureBootloader()
  File "/usr/pkg/lib/python2.7/site-packages/xen/xend/XendDomainInfo.py", line 
2604,
in _configureBootloader
    bootloader_args, kernel, ramdisk, args)
  File "/usr/pkg/lib/python2.7/site-packages/xen/xend/XendBootloader.py", line 
214, i
n bootloader
    raise VmError, msg
VmError: Boot loader didn't return any data!

Any hints on how to proceed would be appreciated.

johnh...