LVM in domU

LVM in domU

[Stephan Böni]

I've tryed to use LVM in my domU, but the "vgdisplay" says:

  --- Volume group ---
  VG Name               xenvg
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  47
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                45
  /proc/misc: No entry for device-mapper found
  Is device-mapper driver missing from kernel?
  Failure to communicate with kernel device-mapper driver.
  Open LV               0
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               299.97 GB
  PE Size               32.00 MB
  Total PE              9599
  Alloc PE / Size       8928 / 279.00 GB
  Free  PE / Size       671 / 20.97 GB
  VG UUID               S3ER0v-xNyR-oTdc-xKkn-pZed-l6uT-Eyg8Il

Is this a valid idea to use LVM within a domU?

Stephan

Re: LVM in domU

[Chris Bainbridge]

On 19/10/05, Stephan Böni <boeni@bpm.ch> wrote:
> I've tryed to use LVM in my domU, but the "vgdisplay" says:
>
>   /proc/misc: No entry for device-mapper found
>   Is device-mapper driver missing from kernel?
>   Failure to communicate with kernel device-mapper driver.

huh? Did you check for device-mapper in dmesg?

> Is this a valid idea to use LVM within a domU?

Most people use LVM in dom0.

Re: LVM in domU

[Luciano Miguel Ferreira Rocha]

On Wed, Oct 19, 2005 at 07:03:15PM +0200, Stephan Böni wrote:
> I've tryed to use LVM in my domU, but the "vgdisplay" says:
> 
>   --- Volume group ---
>   VG Name               xenvg
>   System ID
>   Format                lvm2
>   Metadata Areas        1
>   Metadata Sequence No  47
>   VG Access             read/write
>   VG Status             resizable
>   MAX LV                0
>   Cur LV                45
>   /proc/misc: No entry for device-mapper found
>   Is device-mapper driver missing from kernel?
>   Failure to communicate with kernel device-mapper driver.
>   Open LV               0
>   Max PV                0
>   Cur PV                1
>   Act PV                1
>   VG Size               299.97 GB
>   PE Size               32.00 MB
>   Total PE              9599
>   Alloc PE / Size       8928 / 279.00 GB
>   Free  PE / Size       671 / 20.97 GB
>   VG UUID               S3ER0v-xNyR-oTdc-xKkn-pZed-l6uT-Eyg8Il
> 
> Is this a valid idea to use LVM within a domU?

I use it. Make sure the kernel you're using as domU has support for
device-mapper/LVM (the default kernels from xen don't).

-- 
lfr
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