Online 

Activates the logical volume. 

Starts the volume using the lvchange command. 

Offline 

Deactivates the logical volume. 

Stops the volume using the lvchange command. 

Monitor 

Determines if the logical volume is accessible by performing read I/O on the raw logical volume. 

Determines if the volume is online or offline by reading a block from the raw device interface to the volume. 

Clean 

Terminates all ongoing resource actions and takes the resource offline, forcibly when necessary.