Hi, I am new to LVM and have some basic questions: 1) From the documentation I have read, I think once you extend/reduce a LV or VG you don't need to reboot the system. Correct? 2) Assuming 1 is correct, how is the filesystem made aware of the changes? I'd like to understand the flow of this too. 3) What are LVM snapshots? TIA. -mayank.