From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1IdW4h-0008Dp-OV for garchives@archives.gentoo.org; Thu, 04 Oct 2007 19:09:32 +0000 Received: from robin.gentoo.org (localhost [127.0.0.1]) by robin.gentoo.org (8.14.1/8.14.0) with SMTP id l94Ix1Hq027233; Thu, 4 Oct 2007 18:59:01 GMT Received: from uni10mr.unity.ncsu.edu (uni10mr.unity.ncsu.edu [152.1.1.170]) by robin.gentoo.org (8.14.1/8.14.0) with ESMTP id l94IrGSX019736 for ; Thu, 4 Oct 2007 18:53:17 GMT Received: from [152.14.96.9] (mho.ece.ncsu.edu [152.14.96.9]) by uni10mr.unity.ncsu.edu (8.13.7/8.13.8/Nv5.2006.1109) with ESMTP id l94IrFXa014479 for ; Thu, 4 Oct 2007 14:53:15 -0400 (EDT) Message-ID: <4705369B.9030605@electronsweatshop.com> Date: Thu, 04 Oct 2007 14:53:15 -0400 From: Randy Barlow User-Agent: Thunderbird 1.5.0.12 (X11/20070718) Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Can RAM render useless the encryption of the / and swap partitions? References: <68b1e2610710032342j1b47ff5g8f868d8fcc0179ef@mail.gmail.com> <200710041547.53084.alan@linuxholdings.co.za> <20071004163457.2bf0ad43.hilse@web.de> In-Reply-To: <20071004163457.2bf0ad43.hilse@web.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-PMX-Version: 5.3.3.310218, Antispam-Engine: 2.5.2.313940, Antispam-Data: 2007.10.4.112851 X-Spam-Status: No, Hits=7% X-Spam-Level: IIIIIII X-Archives-Salt: 678b7f2d-316f-4ab8-82db-5ced8f2e296b X-Archives-Hash: 988e9a24134aa3561129b07a8a3167d6 Hans-Werner Hilse wrote: > In theory, for the one transistor and one cap case, you have a loaded > cap that will take "forever" losing its load, won't it? But in > practice, I think, that's not realistic. It's actually not theory vs. practice. Even in theory, it's not just a cap, it's a cap and a resistor. So you have a time constant, tau = R*C. Since the capacitance is very small (picofarads) and we're not talking large resistance either, you end up with a very small time constant and that cap leaks its charge very quickly (which is why the RAM needs to be refreshed and powered). -- R -- gentoo-user@gentoo.org mailing list