[linux-lvm] Secure deletion of data in LVM partitions

[Alexander Konovalenko]

I would like to make recovery of the data on LVM partitions (volumes) more difficult by physically overwriting them with random data several times.  (For background information, please see the ever-linked paper by Peter Gutmann at http://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html.  One utitility that provides mentioned functionality is wipe, see http://wipe.sf.net.)

So my question is how does LVM store its meta-information about the logical and physical volumes?  Is there some meta-info stored in every block?  What parts of data are not physically overwritten when writing to a logical volume?  This is important because in order to delete data more securely one has to overwrite physical tracks of the disk where the data were previously stored.

  -- Alexander