Xen users - Nov 2006 - root filesystem missing loading Debian Sarge DomU

hello everybody,

i have a problem running my domU which is a debian sarge. i did the
following things to get it so far as i am now:

host system: fedora core 5 dom0 with xen 3.0.3 and the xen 2.6.18-1.2200
kernel for the host fedora machine.
virtual xen machine: downloaded on a debian sarge with debootstrap the
needed files (/etc/../boot/.../proc/ etc.)
and copy´d everything except the /dev (because there were a lot of
errors by coping it to the fedora system) to the fedora system in a
image (3gb). i also have a swapimage for the virtual machine (512mb).

the configuration file (vm01.cfg) has the following entries:
-----------
kernel = "/boot/vmlinuz-2.6.18-1.2200.fc5xenU"
memory = 128
root = "/dev/hda1"
name = "vm01"
vif = [ '''' ]
dhcp = "dhcp"
disk
[''file:/vserver/vm01/diskimage,hda1,w'',''file:/vserver/vm01/swapimage,hda2,w''
]
-------------
i also tried to replace the hda1 with sda1 (also in the fstab of the
virtual machine!)

the fstab in the virtual machine consists of the following lines:
------------
/dev/hda1 / ext3 errors=remount-ro 0 1
/dev/hda2 none swap sw 0 0
proc /proc proc defaults 0 0
-------------

i also made manually a /dev directory in the imagefile for the virtual
machine.created with this script:

for i in console null zero ; do /mnt/vm01/dev/MAKEDEV -d /mnt/dev -x $i ; done


so when i start the virtual machine i get the following output (cutted
out only the important things):

---------------------------------
EXT3 FS on hda1, internal journal
EXT3-fs: recovery complete.
EXT3-fs: mounted filesystem with ordered data mode.
VFS: Mounted root (ext3 filesystem).
Freeing unused kernel memory: 144k freed
Write protecting the kernel read-only data: 258k
INIT: version 2.86 booting
Activating swap.

The device node /dev/hda1 for the root filesystem is missing,
incorrect, or there is no entry for the root filesystem
listed in /etc/fstab.

The system is also unable to create a temporary node in
/dev/shm to use as a work-around.

This means you have to fix this manually.

CONTROL-D will exit from this shell and REBOOT the system.

Press enter for maintenance
---------------------------------------------

so i dont know why i get this errors...the startsequence says that there
is an ext3 system in /dev/hda but why cant i get into the system...when
i type enter i see all the folders (/etc/.../src/ etc.)

can anybody help me?

thanks a lot
Alexandros


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Hi!

I think your debian-system is missing the device-file for hda1 in /dev
You can either create one by mounting your filesystem in dom0 and do a

    mknod <path_to_debian_dev>/hda1 b 3 1

or better chroot into your debian-system and do a

    apt-get install udev


Patrick
> hello everybody,
>
> i have a problem running my domU which is a debian sarge. i did the
> following things to get it so far as i am now:
>
> host system: fedora core 5 dom0 with xen 3.0.3 and the xen 2.6.18-1.2200
> kernel for the host fedora machine.
> virtual xen machine: downloaded on a debian sarge with debootstrap the
> needed files (/etc/../boot/.../proc/ etc.)
> and copy´d everything except the /dev (because there were a lot of
> errors by coping it to the fedora system) to the fedora system in a
> image (3gb). i also have a swapimage for the virtual machine (512mb).
>
> the configuration file (vm01.cfg) has the following entries:
> -----------
> kernel = "/boot/vmlinuz-2.6.18-1.2200.fc5xenU"
> memory = 128
> root = "/dev/hda1"
> name = "vm01"
> vif = [ '''' ]
> dhcp = "dhcp"
> disk >
[''file:/vserver/vm01/diskimage,hda1,w'',''file:/vserver/vm01/swapimage,hda2,w''
> ]
> -------------
> i also tried to replace the hda1 with sda1 (also in the fstab of the
> virtual machine!)
>
> the fstab in the virtual machine consists of the following lines:
> ------------
> /dev/hda1 / ext3 errors=remount-ro 0 1
> /dev/hda2 none swap sw 0 0
> proc /proc proc defaults 0 0
> -------------
>
> i also made manually a /dev directory in the imagefile for the virtual
> machine.created with this script:
>
> for i in console null zero ; do /mnt/vm01/dev/MAKEDEV -d /mnt/dev -x $i ;
done
>
>
> so when i start the virtual machine i get the following output (cutted
> out only the important things):
>
> ---------------------------------
> EXT3 FS on hda1, internal journal
> EXT3-fs: recovery complete.
> EXT3-fs: mounted filesystem with ordered data mode.
> VFS: Mounted root (ext3 filesystem).
> Freeing unused kernel memory: 144k freed
> Write protecting the kernel read-only data: 258k
> INIT: version 2.86 booting
> Activating swap.
>
> The device node /dev/hda1 for the root filesystem is missing,
> incorrect, or there is no entry for the root filesystem
> listed in /etc/fstab.
>
> The system is also unable to create a temporary node in
> /dev/shm to use as a work-around.
>
> This means you have to fix this manually.
>
> CONTROL-D will exit from this shell and REBOOT the system.
>
> Press enter for maintenance
> ---------------------------------------------
>
> so i dont know why i get this errors...the startsequence says that there
> is an ext3 system in /dev/hda but why cant i get into the system...when
> i type enter i see all the folders (/etc/.../src/ etc.)
>
> can anybody help me?
>
> thanks a lot
> Alexandros
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>   

_______________________________________________
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Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Hi Patrick,

this helped me out of this problem. Thanks a lot!!!
i have now another problem :(

while the system boots (debian sarge domU) it stops (hangs) after the
loading of the cron daemon...i tried to disable hwclock and the cron at
startup but it didn´t worked out...so if anybody has a sollution for
this problem please answer :)

thanks!!
Alexandros

Patrick Scharrenberg schrieb:
> Hi!
>
> I think your debian-system is missing the device-file for hda1 in /dev
> You can either create one by mounting your filesystem in dom0 and do a
>
>     mknod <path_to_debian_dev>/hda1 b 3 1
>
> or better chroot into your debian-system and do a
>
>     apt-get install udev
>
>
> Patrick
>
>   
>> hello everybody,
>>
>> i have a problem running my domU which is a debian sarge. i did the
>> following things to get it so far as i am now:
>>
>> host system: fedora core 5 dom0 with xen 3.0.3 and the xen
2.6.18-1.2200
>> kernel for the host fedora machine.
>> virtual xen machine: downloaded on a debian sarge with debootstrap the
>> needed files (/etc/../boot/.../proc/ etc.)
>> and copy´d everything except the /dev (because there were a lot of
>> errors by coping it to the fedora system) to the fedora system in a
>> image (3gb). i also have a swapimage for the virtual machine (512mb).
>>
>> the configuration file (vm01.cfg) has the following entries:
>> -----------
>> kernel = "/boot/vmlinuz-2.6.18-1.2200.fc5xenU"
>> memory = 128
>> root = "/dev/hda1"
>> name = "vm01"
>> vif = [ '''' ]
>> dhcp = "dhcp"
>> disk >>
[''file:/vserver/vm01/diskimage,hda1,w'',''file:/vserver/vm01/swapimage,hda2,w''
>> ]
>> -------------
>> i also tried to replace the hda1 with sda1 (also in the fstab of the
>> virtual machine!)
>>
>> the fstab in the virtual machine consists of the following lines:
>> ------------
>> /dev/hda1 / ext3 errors=remount-ro 0 1
>> /dev/hda2 none swap sw 0 0
>> proc /proc proc defaults 0 0
>> -------------
>>
>> i also made manually a /dev directory in the imagefile for the virtual
>> machine.created with this script:
>>
>> for i in console null zero ; do /mnt/vm01/dev/MAKEDEV -d /mnt/dev -x $i
; done
>>
>>
>> so when i start the virtual machine i get the following output (cutted
>> out only the important things):
>>
>> ---------------------------------
>> EXT3 FS on hda1, internal journal
>> EXT3-fs: recovery complete.
>> EXT3-fs: mounted filesystem with ordered data mode.
>> VFS: Mounted root (ext3 filesystem).
>> Freeing unused kernel memory: 144k freed
>> Write protecting the kernel read-only data: 258k
>> INIT: version 2.86 booting
>> Activating swap.
>>
>> The device node /dev/hda1 for the root filesystem is missing,
>> incorrect, or there is no entry for the root filesystem
>> listed in /etc/fstab.
>>
>> The system is also unable to create a temporary node in
>> /dev/shm to use as a work-around.
>>
>> This means you have to fix this manually.
>>
>> CONTROL-D will exit from this shell and REBOOT the system.
>>
>> Press enter for maintenance
>> ---------------------------------------------
>>
>> so i dont know why i get this errors...the startsequence says that
there
>> is an ext3 system in /dev/hda but why cant i get into the system...when
>> i type enter i see all the folders (/etc/.../src/ etc.)
>>
>> can anybody help me?
>>
>> thanks a lot
>> Alexandros
>>
>>
>> _______________________________________________
>> Xen-users mailing list
>> Xen-users@lists.xensource.com
>> http://lists.xensource.com/xen-users
>>   
>>     
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>   

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