[linux-lvm] Snapshots and disk re-use

[Jonathan Tripathy]

On 06/04/2011 01:08, Stuart D. Gathman wrote:
> On Wed, 6 Apr 2011, Jonathan Tripathy wrote:
>
>> lvcreate -nNewCustomerLV -L20G vg0
>>
>> where vg0 is /dev/vg0
>> and vg0 is a volume group which uses an entire physical partition 
>> (Which I guess is called a PV).
>>
>> Now, if I were to create my snapshots on a seperate vg, eg:
>
> You can't do that.  Snapshots must be on the same VG.  James is 
> suggesting you
> create them on the same VG, but a different PV reserved for backup 
> snapshots. 
Guess I need to go back to LVM basics. I had a "hierarchical" structure 
in my head (which must be wrong):

An LV sites on top of a VG which sits on top of a PV

But going by your comment above, you can add multiple PVs (Physical 
partitions) to a single VG and create some form of a JBOD configuration?