On Fri, 06 Jul 2001, you wrote:
> >Marina Brown said:
>
> > When required to wipe a hard drive, i ussually do the following
> > command 3 times.
> >
> > dd if=/dev/zero of=/dev/hda
>
> pn] I was thinking these might be easier to do in Linux than in Windows.
> But I didn't know how dd handled "if" and "of" being of different sizes.
> Does it write repeatedly until it runs out of room and then just terminate
> normally?
>
That's what i do, though if a low level format is available, it will be a better
choice. When i wipe SCSI disks i ALWAYS use the format function in the
SCSI bios.
The command DOES end when the device is out of room. The last time i
did it was when my accountant gave me an old hard drive. He made me
promise to wipe the drive before using it, so i wrote zero's to it repeatedly.
This is very important as it is very easy to recover info from a drive where
everything has been deleted.
Be forwarned that there may still be ways of recovering the data if an
organization with lots of $$$ wants to recover data by putting the disk under
an electron microscope. ....but for normal privacy uses zeroing the drive should
suffice.
Marina Brown
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