Step 1 Close the source LV # umount /fs_on_rootvg Step 2 Copy the source logical volume to the desired volume group. # cplv -v new_vg lv_source this will return the name of the new logicla volum, such as lv00 Step 3 JFS and JFS2 file systems require a log device. run lsvg -l <vg_name> , if JFS or JFS2 log does not exist you have to create it. To make a new JFS2 log, enter # mklv -t jfs2log <vg_name> 1 This will return a new jfs2log volume, such as loblv00. This new log volume will need to be formatted with the logform command . # logform /d ev/log lv00 Answer yes to destroy. Step 4 change file system's lv and log device # chfs -a dev=/dev/lv00 -a log=/dev/loblv00 /myfilessytem Step 5 run fsck to ensure file system integrity. # fsck -p /dev/lv00 Step 6 rmove the source logical volume # rmlv lv_source