[118318] in Cypherpunks
Re: Steganos
daemon@ATHENA.MIT.EDU (Sean Roach)
Fri Sep 24 22:27:06 1999
Message-Id: <3.0.6.32.19990925043922.0082ca80@mail.intplsrv.net>
Date: Sat, 25 Sep 1999 04:39:22 -0500
To: cypherpunks@algebra.com
From: Sean Roach <roach_s@mail.intplsrv.net>
In-Reply-To: <199909240315.XAA28677@mail1.radix.net>
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Reply-To: Sean Roach <roach_s@mail.intplsrv.net>
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At 11:15 PM 9/23/99 -0400, John A. Limpert wrote: >
>
>I thought that only applied to old hard drives that used open loop,
>stepper motor positioners. Don't all modern hard drives use closed
>loop, embedded servo, voice coil positioners?
>
>I remember having to wait for drive temperature stabilization before
>low level formatting some of the original Maxtor SCSI drives.
>
>----------
>>From: Ragnar Hojland Espinosa <ragnar@lightside.dhis.org> >>
>>
>> On Tue, Sep 21, 1999 at 11:12:12PM -0000, Jeff T Gordon wrote: >>>
>>> 3.encrypt each set of doc's sepratly useing differnt keys
>>> 4.Wipe original file with 23 passes
>>
>> You will have more success wiping out files if the HD temperature
>> at which your write and the temperature at which you wipe are
>> similar [0]
>>
>> [0] Obviously temperature at boot time and post boot time arent
>> similar.
>
I'm probably well out of my depth here but remember that almost all
things expand as they become warmer. Hard drive platters wouldn't be
any exception. Granted, for regular use, if the data track is wide
enough, then it shouldn't matter that the data is being read or
written off by 1/100,000th of an inch, but if you are worried about
someone reconstructing your data, that little bit of varience when
the incriminating data was overwritten may mean that there is a
1/100,000th of an inch wide data track with the data still written on
it. I guess that is why the true paranoids advise sandblasting the
platters when they are decommissioned.
Sean Roach
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