Re: [Xen-users] missing logical device

[SpiegelEiXXL <spiegeleixxl@xxxxxxxxxxxxxxx>]

Do a pvscan.
It prolly will say that the parititon is INACTIVE.
If this is the case, try:

vgchange -ay XVG

if it isn't, try activating the partitions by hand:

lvchange -ay /dev/XVG/{root,swap,MGT,r}

After this you should see the 4 partitios in /dev/XVG and /dev/mapper/XVG*


If you installed the LVM from a package manager, it usually should install a init.d script that does

	/sbin/vgscan
	/sbin/vgchange -ay

Can you check if a script exists that does something like that?
If it doesn't, did you try rebooting and see if they are still inactive?

(Maybe this will help you: http://www.faqs.org/docs/Linux-HOWTO/LVM-HOWTO.html)


Best

On 01.10.2010 14:38, kibirango moses wrote:

There is'nt any device dev/XVG Lvscan command gives me that:

[root@virtualintranet dev]# lvscan
  inactive          '/dev/XVG/MGT' [4.00 MB] inherit
  inactive          '/dev/XVG/root' [80.00 GB] inherit
  inactive          '/dev/XVG/swap' [1.00 GB] inherit
  inactive          '/dev/XVG/r' [80.00 GB] inherit

On Fri, Oct 1, 2010 at 2:29 PM, SpiegelEiXXL <spiegeleixxl@xxxxxxxxxxxxxxx> wrote:

Hello.

Can you check the output of
lvm pvdisplay
to see if LVM actually started/added the drive(s)?
Did you also try a lvmdiskscan / lvscan ?
the lvm should usually be mapped due when you boot into your system. Maybe something went wrong.
Can you also check /dev/mapper/ and /dev/XVG?

On 01.10.2010 11:18, kibirango moses wrote:

I am putting up a guest OS on a VM and created the LOGICAL DEVICES as shown in the etc/fstab as shown below:

[root@virtualintranet /]# cat etc/fstab

LABEL=root-bubksnsv    /         ext3     defaults   1  1

/var/swap/swap.001          swap      swap   defaults   0  0

/dev/sda2          swap      swap   defaults   0  0

/dev/XVG/swap          swap      swap   defaults   0  0

none        /dev/pts  devpts defaults   0  0

none        /dev/shm  tmpfs  defaults   0  0

none        /proc     proc   defaults   0  0

none        /sys      sysfs  defaults   0  0

/opt/xensource/packages/iso/XenCenter.iso   /var/xen/xc-install   iso9660   loop,ro   0  0

/dev/XVG/root        /xen      ext3  defaults   0  0

/dev/XVG/r        /xen/domU      ext3  defaults   0  0

 

On restarting the server I tried to mount them again

[root@virtualintranet /]# mount xen/

mount: special device /dev/XVG/root does not exist.

I wonder what made my devices disappear and how can I reinstate them? Is there anything I missed like storage parameters during the setting up.

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