[clue] secure erase techniques?

[Will]

It should eventually quit on its own.  The amount of time it will take is
dependent on how fast your CPU can generate random numbers and how large the
partition is.

On Wed, Jun 1, 2011 at 5:09 AM, Mike Bean <beandaemon at gmail.com> wrote:

> How long would I need to leave this running?   cat /dev/urandom > /dev/sda1
> 's been going for long about 10 hours now.  Is this something that I'll need
> to abort or does it terminate on its own?
>
>
> On Tue, May 31, 2011 at 9:04 AM, chris fedde <chris at fedde.us> wrote:
>
>> Raymond,
>>
>> What does the magic block size do?
>>
>>
>> I'd go with two passes of "cat /dev/urandom > /dev/sdX" as root.
>>
>> On Tue, May 31, 2011 at 8:51 AM, Raymond DeRoo <rderoo at deroo.net> wrote:
>> > Mike--
>> >
>> > In short, I'm giving one of my older PC's to a friend's friend.  One of
>> > those, I don't need it, things.  In any case, in terms of secure
>> destruction
>> > of drives, my father's always taught me to disassemble the drives and
>> throw
>> > the heads and the platter out separately.  Can't do it here, they need
>> the
>> > drives, so I thought I'd ask for advice in case we have members who
>> might
>> > know a thing or two about this sort of thing.  I figured I'd probably
>> just
>> > boot it to a live CD and nuke the partitions, and that's probably
>> enough,
>> > after all, I don't need like a military-grade erase, but I'll settle for
>> > making it @#$@#$@$ hard to recover.  Any suggestions are welcome.
>> >
>> >
>> > # dd if=/dev/urandom of=/dev/sda bs=387 count=<size of disk in bites> /
>> 383
>> > Recover from this *IS* still possible, but generally requires someone
>> who is
>> > *VERY* knowledge about drives to do as such.
>> > .r
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