CORRECT TEXT
One Logical Volume named /dev/test0/testvolume1 is created. The initial Size of that disk is
100MB now you required more 200MB. Increase the size of Logical Volume, size should be
increase on online.

Answer:

Explanation:
1. lvextend -L+200M /dev/test0/testvolume1
Use lvdisplay /dev/test0/testvolume1)
2. ext2online -d /dev/test0/testvolume1
lvextend command is used the increase the size of Logical Volume. Other command lvresize
command also here to resize. And to bring increased size on online we use the ext2online
command.