From owner-freebsd-questions@FreeBSD.ORG Sun Jan 18 23:50:31 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B548C16A4CE for ; Sun, 18 Jan 2004 23:50:31 -0800 (PST) Received: from fw.farid-hajji.net (fw.farid-hajji.net [213.146.115.42]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9DABD43D3F for ; Sun, 18 Jan 2004 23:50:27 -0800 (PST) (envelope-from cpghost@cordula.ws) Received: from fw.farid-hajji.net (localhost [127.0.0.1]) by fw.farid-hajji.net (Postfix) with ESMTP id 28D7440854; Mon, 19 Jan 2004 08:49:47 +0100 (CET) From: Cordula's Web To: p2sam@yahoo.com In-reply-to: <200401182304.05574.p2sam@yahoo.com> (message from Pedro Sam on Sun, 18 Jan 2004 23:04:04 -0500) X-Mailer: Emacs-21.3.1/FreeBSD-4.9-STABLE References: <007701c3ddaf$8c58f000$8b01010a@nyalaptopen> <1074484137.21654.7.camel@tux> <200401182304.05574.p2sam@yahoo.com> Message-Id: <20040119074947.28D7440854@fw.farid-hajji.net> Date: Mon, 19 Jan 2004 08:49:47 +0100 (CET) cc: freebsd-questions@freebsd.org Subject: Re: [was: Cutting the power ... ] Journaling file system X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: cpghost@cordula.ws List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Jan 2004 07:50:31 -0000 > On January 18, 2004 10:48 pm, Micheas Herman wrote: > > Use flash ram cards and a journaling file system. (soft updates may work > > but you need to talk to someone that knows about them much better than I > > do.) Beware when using flash ram as some kind of live filesystem! Flash media has a quite limited number of erase cycles You may think that's plenty, but since filesystem meta-data is often written at the same location (superblocks etc...), this location will quickly reach the threshold, where it can't be used anymore! Even journaling fs are not perfect w.r.t. conserving erase- cycles. Perhaps someone's doing research on a filesystem type that is kindlier to flash media? -- Cordula's Web. http://www.cordula.ws/