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Re: [Xen-users] Xen HDD failure - Migration

To: Mihai Tanasescu <mihai@xxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Xen HDD failure - Migration
From: Alexander Hoßdorf <xen-users@xxxxxxxxxxx>
Date: Wed, 13 Aug 2008 07:38:56 +0200
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Mihai Tanasescu schrieb:
Hello all,



I just started experimenting with XEN and ran into problems 1 month afterwards.

I had it on a single hard-disk system and the disk started failing.
I managed to copy /etc/xen and /home/xen (with the image files for each virtual machine I had) to some remote storage.


Now I reinstalled the machine on a RAID 1 enabled system and copied the files back.

Configuration looks the following in /etc/fstab:

[root@robu076pps mnt]# cat /etc/fstab
/dev/VolGroup00/LogVol00 / ext3 defaults 1 1 LABEL=/boot /boot ext3 defaults 1 2 tmpfs /dev/shm tmpfs defaults 0 0 devpts /dev/pts devpts gid=5,mode=620 0 0 sysfs /sys sysfs defaults 0 0 proc /proc proc defaults 0 0 /dev/VolGroup00/LogVol01 swap swap defaults 0 0


but if I try to start one of the old virtual machines (after modifying initrd and kernel parameters to the actual xen ones in this system) I get:

Scanning and configuring dmraid supported devices
no block devices found
failed to stat() /dev/mapper/nvidia_adcabaef
Scanning logical volumes
  Reading all physical volumes.  This may take a while...
  No volume groups found
Activating logical volumes
  Volume group "VolGroup00" not found
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.

Afterwards the Virtual Machine stops.


Can someone help me on how to troubleshoot this ?
I'm trying to avoid reinstalling the affected systems completely.



Thanks,
Mihai


Hi,

could you show us your VM configuration file please?

Cheers,
Alex

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