Re: [Xen-users] Unable to mount LVM - backed VBD

["Christopher G. Stach II" <cgs@xxxxxxxxx>]

rajarshi das wrote:
> All,
>  
> I have a SLES10 system with the following volume groups:
>  
> 1) /dev/volgrplinux :
>                           logvolroot (lv)
>                           logvolswap (lv)
>  
> 2) /dev/volgrpguest :
>                            logvol1 (lv)
>  
> I want to use the logvol1 as a lvm - backed vbd.
>  
> $ xm create -c xmexample.lvm-vbd
> ....
> ......
> xvda: Loading dm-mod
> unknown partition table
> device-mapper: 4.5.0-ioctl (2005-10-04) initialised: dm-devel@xxxxxxxxxx
> <mailto:dm-devel@xxxxxxxxxx>
> Loading dm-snapshot
> Waiting for /dev/mapper/control to appear: ok
> Loading jbd
> Loading ext3
>      Unable to find volume group "logvolroot"
>  Waiting for device /dev/mapper/volgrplinux-logvolroot to appear:
> ........ not found -- exiting to /bin/sh
> $
>  
>  
> Following is the configuration file:
> ---------start of config file------------------------------
> # Kernel image file and (optional) ramdisk (initrd).
> kernel = "/boot/vmlinuz-xenpae"
> ramdisk = "/boot/initrd-xenpae"
> 
> # Initial memory allocation (in megabytes) for the new domain.
> memory = 64
> 
> # A name for your domain. All domains must have different names.
> name = "ExampleDomain1"
> 
> vif = [ '' ]
> 
> disk = [ 'phy:volgrpguest/logvol1,volgrplinux/logvolroot,w' ]
> 
> #dhcp="dhcp"
> # Set netmask.
> #netmask=
> # Set default gateway.
> #gateway=
> # Set the hostname.
> #hostname= "vm%d" % vmid
> 
> # Set root device.
> #root = "/dev/hda1 ro"
> root = "/dev/mapper/volgrplinux-logvolroot ro"
> 
> # Sets runlevel 4.
> extra = "4"
> ----------------end of config file------------------------
>  
> $ ls -l /dev/mapper
>  
> lrwxrwxrwx 1 root root 16 nov 14 18:11 control -> ../device-mapper
> brw------- 1 root root 253,2 nov 15 9:59 volgrpguest-logvol1
> brw------- 1 root root 253,0 nov 14 18:11 volgrplinux-logvolroot
> brw------- 1 root root 253,1 nov 14 18:11 volgrplinux-logvolswap
>  
>  
>  
>  
> Is there something in the configuration that prevents the logvolroot
> from being found?
>  
> Also, are there any additional modules that need to be modprobed (apart
> from dm-mod and dm-snapshot) when a domU starts up?
>  
> Please suggest how to fix this.
>  
> Thanks,
> Rajarshi
> 

Your disk and root lines are bad, to start with.

-- 
Christopher G. Stach II

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