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-lvswapName               Maj Min Stat   Open Targ Event  UUIDrootvg-lvswap   253   8    L–w    1    1      [...]

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SUSE Linux + LVM in rescue mode

Just Steps
1.  Boot from SUSE Linux Install CD2.  Select Rescue Mode3.  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 [...]

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