[linux-lvm] Snapshots and disk re-use

[Jonathan Tripathy]

On 23/02/11 17:54, Stuart D. Gathman wrote:
> On Wed, 23 Feb 2011, Jonathan Tripathy wrote:
>
>>> Zeroing c1_s1 first, then c1_s1_snap0-cow would zero everything,
>> Thanks for the explanation. But what if I don't want to zero everything? I
>> only want to return everything back to the state it was before I created the
>> snapshot.
> So you're not worried about the security implication of leftovers in free
> space, and just want a base image to clone for new customers?
Yes I am. This is exactly what I'm worried about. I just need to know 
how to zero out any "left over" bits of data that would be left over 
after removing a snapshot. I use snapshots for backing up a volume (by 
running rsync against the snapshot to a remote server)