How to mark volume groups as active or inactive

Here we are going to findout how to mark volume groups as active or inactive in Linux using lvchange command in Linux Use lvscan command to get list of volumes

#/usr/sbin/lvscan

the output will be

ACTIVE            ‘/dev/Linux_volume/LogVol00′ [33.78 GB] inherit
ACTIVE            ‘/dev/Linux_volume/LogVol02′ [10.00 GB] inherit
ACTIVE            ‘/dev/VolGroup00/LogVol00′ [35.25 GB] inherit
ACTIVE            ‘/dev/VolGroup00/LogVol01′ [1.94 GB] inherit

Then for testing, mark this Linux_volume as inactive by following procedure. Umount the partitions before proceeding.Then use the following command to mark volume group inactive.

#/usr/sbin/lvchange -a n /dev/Linux_volume

Verify it with lvscan.The current lvscan output will be,

inactive          ‘/dev/Linux_volume/LogVol00′ [33.78 GB] inherit
inactive          ‘/dev/Linux_volume/LogVol02′ [10.00 GB] inherit
ACTIVE            ‘/dev/VolGroup00/LogVol00′ [35.25 GB] inherit
ACTIVE            ‘/dev/VolGroup00/LogVol01′ [1.94 GB] inherit

We can change it back to active with following command

# /usr/sbin/lvchange -a y /dev/Linux_volume

Note: You must Umount the partitions before proceeding to mark volume group inactive
And mount the logical volumes after marking active

Read more: http://www.lynuxstuff.com/2011/06/how-to-mark-volume-groups-as-active-or-inactive/#ixzz23ftkCdmG