From owner-freebsd-current@FreeBSD.ORG Thu May 25 18:46:19 2006 Return-Path: X-Original-To: current@freebsd.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9EE9516B5CB for ; Thu, 25 May 2006 18:46:19 +0000 (UTC) (envelope-from jd@ugcs.caltech.edu) Received: from groat.ugcs.caltech.edu (groat.ugcs.caltech.edu [131.215.176.110]) by mx1.FreeBSD.org (Postfix) with ESMTP id 45E9443D53 for ; Thu, 25 May 2006 18:46:19 +0000 (GMT) (envelope-from jd@ugcs.caltech.edu) Received: by groat.ugcs.caltech.edu (Postfix, from userid 3640) id 49D725880B; Thu, 25 May 2006 11:46:18 -0700 (PDT) Date: Thu, 25 May 2006 11:46:18 -0700 From: Paul Allen To: Olivier Gautherot Message-ID: <20060525184618.GC28128@groat.ugcs.caltech.edu> References: <3981.1148578569@critter.freebsd.dk> <4475EFC1.1020504@nortel.com> <1148580598.4475f2f677197@imp2-g19.free.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1148580598.4475f2f677197@imp2-g19.free.fr> Sender: jd@ugcs.caltech.edu Cc: current@freebsd.org Subject: Re: FreeBSD's embedded agenda X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 May 2006 18:46:25 -0000 >From Olivier Gautherot , Thu, May 25, 2006 at 08:09:58PM +0200: > Don't forget that Flash doesn't suffer from mechanical delays so there > is no harm in fragmenting the filesystem: this would be another feature. This statement is false + you give the reason why only a few steps earlier: > (what FFS doesn't naturally do). Also, there is a constraint regarding > the changes allowed: on NAND flash, you can write a 0 on a bit but have > to erase the full block to write a 1 back. Erase cycles are often 1ms in duration. Paul