F7: how to add second hard disk using system-config-lvm

[Yu Yi]

hi,
Problem by adding second hard disk using system-config-lvm:
Master disk:250G
Slave disk: 40G (newly installed)
The system can detect both correctly, they are
Master disk = /dev/sda (Partition 2)
slave disk = /dev/sdb (Partition 2)

But the newly inserted disk (40G) shows umounted, how can I extend the logical
volume group to include the slave disk?

-- 
Yu Yi                      
C5220 (Labor)    
Tel: Uni - 21585  
FB Mathematik und Informatik
Philipps-Universitaet Marburg 
D-35032 Marburg 
yi at mathematik.uni-magdeburg.de