LVM2 remove or deactivate problem

In some version of RHEL and Suse Linux LVM2 won’t remove or deactivate logical volume or volume groups due to their being open.

# lvremove /dev/rootvg/lvswap
  Can’t remove open logical volume “lvswap”

Use dmsetup command to check the status of lvm

# dmsetup info -c rootvg-lvswap
Name               Maj Min Stat   Open Targ Event  UUID
rootvg-lvswap   253   8    L–w    1    1      0 Dw0QIgVGOulDwWsiFZMD1Pi7JLQWcNnruaCRo1f8OxdYQpfZYiYigBp1Ccqx1VRa

 

#man dmsetup

dmsetup is a low level logical volume management

dmsetup manages logical devices that use the device-mapper driver.

 

As you can see from the above command Open status is equal to 1. Use the following command to remove the dm table entry .

#dmsetup remove rootvg-lvswap2

Try this one more time now

# lvremove /dev/rootvg/lvswap2
  Logical volume “lvswap2″ successfully removed

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SUSE Linux + LVM in rescue mode

Just Steps

1.  Boot from SUSE Linux Install CD
2.  Select Rescue Mode
3.  Login as “root” to rescue mode (no password)
4.  Manually mount your non-LVM disks   
    a.  mkdir /mnt/root
    b.  mount /dev/sda1 /mnt/root/boot

5.  Manually mount your LVM stuff:
    b.  vgscan
    c.  vgchange -a -y rootvg
    d.  mount /dev/rootvg/lvroot /mnt/root/boot
    d.  mount /dev/rootvg/lvusr /mnt/root/boot/usr
    d.  mount /dev/rootvg/lvopt /mnt/root/boot/opt
    d.  mount /dev/rootvg/lvhome /mnt/root/boot/home
    d.  mount /dev/rootvg/lvvar /mnt/root/boot/var

** You can now update your configuration to recover your system from what 
   ever you did to get to this point..

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