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Re: [Xen-users] Volume group "VolGroup00" not found


  • To: Abdul Qadeer <qadeer.qadeer@xxxxxxxxx>, Brian Krusic <brian@xxxxxxxxxx>
  • From: Boris Derzhavets <bderzhavets@xxxxxxxxx>
  • Date: Wed, 11 Feb 2009 11:37:55 -0800 (PST)
  • Cc: Matt Vliet <mvliet@xxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Wed, 11 Feb 2009 11:38:46 -0800
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--- On Wed, 2/11/09, Brian Krusic <brian@xxxxxxxxxx> wrote:
From: Brian Krusic <brian@xxxxxxxxxx>
Subject: Re: [Xen-users] Volume group "VolGroup00" not found
To: "Abdul Qadeer" <qadeer.qadeer@xxxxxxxxx>
Cc: "Matt Vliet" <mvliet@xxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
Date: Wednesday, February 11, 2009, 2:15 PM

One last thing, I'm pretty conservative and my network designs always work so I suggest keeping with the version of Xen shipping with your distro.

I run Centos 5.2 which ships with Xen 3.2 or something like that
 
***************************************************************
CentOS 5.2 ships with Xen 3.1.2 Hypervisor, kernel is still 3.0.3
Looks like you want http://gitco.de to go out of business ,
but they are pretty much in ;)
***************************************************************

which runs smoothly w/o fail.

I would only go outside the box if requiring a feature not found in your shipped sw or running into a documented bug which is addressed in a later version.

Of course, required features depend on your system design which depend on your business requirements but thats just my suggestion to you.

- Brian




On Feb 11, 2009, at 10:55 AM, Abdul Qadeer wrote:

On Wed, Feb 11, 2009 at 11:43 PM, Matt Vliet <mvliet@xxxxxxx> wrote:
Abdul Qadeer wrote:
Hi,

I am compiling Xen from source on FC9.  On booting the
Xen dom0 kernel it gives the following error:

Volume group "VolGroup00" not found

and ultimately the error that switchroot: mount failed: No such file or directory

So my question is that why it fails to detect logical volumes?


Your initrd is probably missing some drivers.
Something along this should fix your problem:

# depmod 2.6.18.8-xen
# mkinitrd -v -f --with=dm-mod --with=dm-mirror --with=dm-snapshot --with=dm-zero /boot/initrd-2.6.18.8-xen.img 2.6.18.8-xen

you may also need to load specify some sata drivers for your system.

If that doesn't work, then do an 'lsmod' on your system(non-xen kernel) and add any driver listed there that seems related to storage(scsi, sata, ata, etc..) to the initrd as well.
 

I did that.  But a few of the drivers (e.g. ata_general) are absent in Xen based kernel so mkinitrd fails to include it (this driver is otherwise present in my FC9 system).  So now the question is how do I include this ata_general in xen kernel?

Thanks,
Abdul Qadeer

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