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Full Discussion: Destroying data down to the 13th level???
Special Forums Hardware Filesystems, Disks and Memory Destroying data down to the 13th level??? Post 18879 by LivinFree on Thursday 4th of April 2002 01:30:02 AM
Old 04-04-2002
Maybe use /dev/random or /dev/urandom?
I have never tried this, but does anyone know if you can simply do something like this:
Code:
#!/bin/sh
n=12
while [ $n -gt 0 ]; do
dd if=/dev/urandom of=/dev/(hard drive device you want dead)
n=`expr $n - 1`
done
cat /dev/zero > /dev/(hard drive device you want dead)

I know it would be taxing on the disk, and possibly the entire system, but for curiosity sake, would it work?
 

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LEARN ABOUT REDHAT

fdformat

FDFORMAT(8)						     Linux Programmer's Manual						       FDFORMAT(8)

NAME

       fdformat - Low-level formats a floppy disk

SYNOPSIS

       fdformat [ -n ] device

DESCRIPTION

       fdformat  does  a  low  level  format on a floppy disk.	device is usually one of the following (for floppy devices, the major = 2, and the
       minor is shown for informational purposes only):

	      /dev/fd0d360  (minor = 4)
	      /dev/fd0h1200 (minor = 8)
	      /dev/fd0D360  (minor = 12)
	      /dev/fd0H360  (minor = 12)
	      /dev/fd0D720  (minor = 16)
	      /dev/fd0H720  (minor = 16)
	      /dev/fd0h360  (minor = 20)
	      /dev/fd0h720  (minor = 24)
	      /dev/fd0H1440 (minor = 28)

	      /dev/fd1d360  (minor = 5)
	      /dev/fd1h1200 (minor = 9)
	      /dev/fd1D360  (minor = 13)
	      /dev/fd1H360  (minor = 13)
	      /dev/fd1D720  (minor = 17)
	      /dev/fd1H720  (minor = 17)
	      /dev/fd1h360  (minor = 21)
	      /dev/fd1h720  (minor = 25)
	      /dev/fd1H1440 (minor = 29)

       The generic floppy devices, /dev/fd0 and /dev/fd1, will fail to work with fdformat when a non-standard format is being used, or if the for-
       mat has not been autodetected earlier.  In this case, use setfdprm(8) to load the disk parameters.

OPTIONS

       -n     No verify.  This option will disable the verification that is performed after the format.

SEE ALSO

       fd(4), setfdprm(8), mkfs(8), emkfs(8)

AUTHOR

       Werner Almesberger (almesber@nessie.cs.id.ethz.ch)

Linux 0.99							  1 February 1993						       FDFORMAT(8)
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