[svlug] 2 part Linux question
maxwellmarc at yahoo.com
Wed Jul 9 23:36:45 PDT 2003
Hello Linux Gurus and Penguinoids,
I am curious about a couple of things. I want to wipe
data off of an IDE drive COMPLETELY, absolutely and
totally gone forever and NOT recoverable. I have
recently learned to my dismay that formats and even
the utilities that write ones and zeroes to the drive,
are really not completely erasing the data.
Part 1. I am curious about using dd for this. My
understanding is you can say something like:
# dd if==/dev/hda of=/dev/urandom
I heard that you have to do this multiple times. Does
anyone know if that is true? If so, how many times
and why? Also, the dd command *will* work ((it does
something, but it doesn't print hash marks or give you
a percentage done or anything like that). So how long
do you let it run? Ten instances of 2 minutes each?
One instance of Five hours? A whole day per instance
(times however many you have to repeat the process)?
Does the size of the drive matter?
I am definitely not hung up on dd; if there is another
better utility please let me know, 3rd parties welcome
if they are good.
Part 2. Is there a way to encrypt a drive under
linux? This is less important than the first question
just a fyi for me.
Any info is appreciated. Thanks,
Registered Linux user # 319836
Linux- the Operating System of the 21st Century
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