[linux-lvm] Secure deletion of data in LVM partitions
a-konovalenko at yandex.ru
Wed Feb 11 03:41:02 UTC 2004
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.
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