Hi all
What is the best practice to remove all data in the disk?
ls fdisk ok or use dd
Can data be recovered?
and what is the dd command?
Thank you
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Greetings, On Thu, Mar 4, 2010 at 6:31 PM, chloe K <chloekcy2000 at yahoo.ca> wrote:> Hi all > > What is the best practice to remove all data in the disk? > > ls fdisk ok or use dd > > Can data be recovered? > > and what is the dd command? >fdisk just repartiions the disk. dd is an axe. It can be used to copy anything to anything. This is useful to _really_ wipe data off. Regards Rajagopal
On Thu, Mar 4, 2010 at 1:01 PM, chloe K <chloekcy2000 at yahoo.ca> wrote:> What is the best practice to remove all data in the disk?If you want to securely remove the data, I recommend using a tool like DBAN. If you want to just wipe out the partition & boot sector for a clean reinstallation, dd'ing the disk with zero for a couple of Mbytes is more than enough. -- Hakan (m1fcj) - http://www.hititgunesi.org
On 4 March 2010 14:01, Sorin Srbu <sorin.srbu at orgfarm.uu.se> wrote:> I second that. Dban is the niftiest thing since sliced bread. Very handy > tool, if a bit slow. But I guess that comes with the territory. 8-)The ATA Secure Erase command is generally faster but more difficult - see http://ata.wiki.kernel.org/index.php/ATA_Secure_Erase Ben
From: chloe K <chloekcy2000 at yahoo.ca>> What is the best practice to remove all data in the disk? > ls fdisk ok or use ddMaybe something like (replace the ?): - fast but not secure: dd if=/dev/zero of=/dev/?d? bs=4096 - slow but more secure: dd if=/dev/zero of=/dev/?d? bs=4096 - n times slower but n times more secure: for ((i=1; i<=n; i++)); do dd if=/dev/zero of=/dev/?d? bs=4096; done JD
> Hi all > > What is the best practice to remove all data in the disk? > > ls fdisk ok or use dd > > Can data be recovered? > > and what is the dd command? > > Thank you ><http://www.dban.org/> Default with boot and nuke is three (or is it four?) passes, but you can tell it full US DoD seven passes, which meets all US gov't requirements for data destruction, and no, you can't get it back. Alternatively, the answer on another techie mailing list I'm on is that you could disassemble the disks and use thermite. mark
From: John Doe <jdmls at yahoo.com>> From: chloe K > > What is the best practice to remove all data in the disk? > > ls fdisk ok or use dd > Maybe something like (replace the ?): > - fast but not secure: > dd if=/dev/zero of=/dev/?d? bs=4096 > - slow but more secure: > dd if=/dev/zero of=/dev/?d? bs=4096 > - n times slower but n times more secure: > for ((i=1; i<=n; i++)); do dd if=/dev/zero of=/dev/?d? bs=4096; doneOops, for the slow procedures, it is /dev/random instead of /dev/zero... JD
John Doe wrote:> > Oops, for the slow procedures, it is /dev/random instead of /dev/zero...Ah, ok, disregard the other message. Mike -- p="p=%c%s%c;main(){printf(p,34,p,34);}";main(){printf(p,34,p,34);} Oppose globalization and One World Governments like the UN. This message made from 100% recycled bits. You have found the bank of Larn. I speak only for myself, and I am unanimous in that!