lvm on an external enclosure?

[Ron Johnson <ron.l.johnson@cox.net>]

Hi,

(I tried Googling this, but my Google-fu must be lacking.)

I want to put 2 1TB drives in an external enclosure, lvm them 
together and use them as a backup devices.

Two questions:
1. What kind of problems or issues might I have when trying to boot 
and lvm doesn't see a vg?  I'm guessing Linux will squawk and 
continue booting.

2. More importantly, what about when I power up the external 
enclosure, after Linux is already running?  Will lvm automagically 
recognize the new drives as part of their own vg?  Or will I have to 
bounce lvm?

TIA

--
Ron Johnson, Jr.
Jefferson LA  USA

"Freedom is not a license for anarchy."