[linux-lvm] Snapshots and disk re-use

Stuart D. Gathman stuart at bmsi.com
Wed Feb 23 23:42:10 UTC 2011

On Wed, 23 Feb 2011, Stuart D. Gathman wrote:

> If, in addition to "cross-customer data leakage", you are worried about
> FBI raids finding old data from deleted customers in LVM free space, then zero
> independent LVs when deleting (as you planned), and zero *-cow for snapshots
> before deleting with the origin unmounted (but check with an expert whether
> that is safe while other snapshots for the same origin are mounted - I think
> it should be).

Also, if worried about free space leakage, you should periodically allocate a
(huge) LV that uses all remaining space, and zero it.  That will clean up
after any time an operator may not have followed the procedure.  

	      Stuart D. Gathman <stuart at bmsi.com>
    Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.

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