That last post is a little unclear on snapshot sizing. (It reads verbatim from the latest manual)
Lets try some examples here and see if someone can straighten me out.
I created a lv of 300gb and a snapshot volume of 300gb and attached it to the main lv.
Now since it is a block device, does it just do a block copy? Or does it do a point in time difference (delta)? If it is a delta, is the lv a delta of the snapshot or the otherway around?
Since I created a 300gb lvm and a 300gb snapshot, am I only able to get 1 snapshot? So if I decided to create a snapshot schedule that would take a snapshot on Sat nights when no one is using the system and just have it overwrite the previous snapshot, would that work?
Thanks