A file when removed from linux OS does not remove the data it just unlink the inode associated with the file which makes data unaccessible. If the disk is /dev/zeroed I don't think it will reappear. --Sunil -----Original Message----- From: linux-lvm-bounces@redhat.com [mailto:linux-lvm-bounces@redhat.com] On Behalf Of Jonathan Tripathy Sent: Wednesday, February 23, 2011 6:06 PM To: linux-lvm@redhat.com Subject: Snapshots and disk re-use Hi Everyone, We host many Xen VMs for customers. We use LVM as the fisk storage for these VMs. When a customer cancels, we generally dd their LV with /dev/zero, before removing the LV. If however we want to create a snapshot of a customer's LV, is there the chance that the data may appear on a new future LV if we were to create one (for a new customer)? Is is my understanding that most filesystems don't actually remove data from a disk when deleting a file, but just set an "ignore" tag of some sort... Thanks _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
