Logical Volume Vs HDD

[Bruno Wolff III]

On Mon, Apr 10, 2006 at 22:36:37 +0100,
  Timothy Murphy <tim at birdsnest.maths.tcd.ie> wrote:
> Ali Helmy wrote:
> 
> > Thanks mates, I now have a single LV that spans both of my small HDDs
> > together, to make a single 30GB partition, out of a 10GB & 20GB HDDs...
> 
> I know that is possible, but what is the point of it?
> Wouldn't it be easier to have, say, / on the first disk 
> and /home on the second?
> What is the advantage of a single LV?

It allows for more flexibility in handling space.
However, there are downsides to doing this. If either disk goes you have
effectively lost both drives.