From owner-freebsd-arch@FreeBSD.ORG Tue Apr 1 17:48:16 2008 Return-Path: Delivered-To: freebsd-arch@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 080171065676 for ; Tue, 1 Apr 2008 17:48:16 +0000 (UTC) (envelope-from dillon@apollo.backplane.com) Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by mx1.freebsd.org (Postfix) with ESMTP id D871F8FC13 for ; Tue, 1 Apr 2008 17:48:15 +0000 (UTC) (envelope-from dillon@apollo.backplane.com) Received: from apollo.backplane.com (localhost [127.0.0.1]) by apollo.backplane.com (8.14.1/8.14.1) with ESMTP id m31HmE7w039801; Tue, 1 Apr 2008 10:48:14 -0700 (PDT) Received: (from dillon@localhost) by apollo.backplane.com (8.14.1/8.13.4/Submit) id m31HmE1h039800; Tue, 1 Apr 2008 10:48:14 -0700 (PDT) Date: Tue, 1 Apr 2008 10:48:14 -0700 (PDT) From: Matthew Dillon Message-Id: <200804011748.m31HmE1h039800@apollo.backplane.com> To: "Martin Fouts" References: <20080330231544.A96475@localhost> <200803310135.m2V1ZpiN018354@apollo.backplane.com> <200803312125.29325.qpadla@gmail.com> <200803311915.m2VJFSoR027593@apollo.backplane.com> <200803312219.m2VMJlkT029240@apollo.backplane.com> Cc: freebsd-arch@freebsd.org Subject: RE: Flash disks and FFS layout heuristics X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussion related to FreeBSD architecture List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Apr 2008 17:48:16 -0000 : :> -----Original Message----- :> From: Matthew Dillon [mailto:dillon@apollo.backplane.com]=20 :> Sent: Monday, March 31, 2008 3:20 PM :>=20 :> For flash storage systems competitive with hard drive storage,=20 : :In embedded systems, it's RAM that flash storage competes with, not hard : :drive storage. : :SSD is a completely different engineering problem. You know, I think I've asked this already and you don't have to answer it if you don't want to, but exactly how large a flash device are you working with in your embedded project(s)? -Matt