Here is a line I use to zero a partition: dd if=/dev/zero of=/dev/hdb1 bs=1024 That does a good job for me. I got this from "Running Linux" and it does a good job. and only that partition is affected. Clay > -----Original Message----- > From: technomage-hawke@cox.net > Sent: Sat, 21 Oct 2006 17:50:37 -0700 > To: plug-discuss@lists.plug.phoenix.az.us > Subject: Re: How to make sure it's really gone? > > badblocks is useful for this (someone else a long time ago posted a > command > line for badblocks that would make data on the drive truly > non-recoverable). > > here's the command line I used: > > badblocks -f -t random -p 30 -sv -w /dev/ > > this command will take a very long time to run on any of the large >10 GB > drives BUT, it will insure that no usable data of any kind remains > afterward > (even the NSA would have a heart attack on this). > > my scenario for a full wipe involves this: > > dd if=/dev/zero of=/dev/ && dd if=/dev/urandom of=/dev/ > && > badblocks -f -t random -p 30 -sv -w /dev/ > > that can be placed in a script and run as many times as you see fit. > However, > with 30 passes in the badblocks in -w mode, you can pretty much be > assured > that no data will exist afterward. > > more comments? > > > On Saturday 21 October 2006 17:24, Jim wrote: >> Let's assume I have some data on a Dreiser's or ext3 partition. Short >> of removing the drive and smashing it, how can I make sure with >> reasonable certainty the data is gone? >> >> I looked at the manage for shred and it says it doesn't work on >> journaled file systems such as ReiserFS, Ext3 and others. Is there >> something that will do the job on an ext3 or reiserfs partition? >> >> Thanks > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us > To subscribe, unsubscribe, or to change you mail settings: > http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss --------------------------------------------------- PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us To subscribe, unsubscribe, or to change you mail settings: http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss