From owner-freebsd-arch@FreeBSD.ORG  Tue Apr  1 18:06:35 2008
Return-Path: <owner-freebsd-arch@FreeBSD.ORG>
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 DDC28106564A
	for <freebsd-arch@freebsd.org>; Tue,  1 Apr 2008 18:06:35 +0000 (UTC)
	(envelope-from mfouts@danger.com)
Received: from mx.danger.com (wall.danger.com [216.220.212.140])
	by mx1.freebsd.org (Postfix) with ESMTP id C324E8FC22
	for <freebsd-arch@freebsd.org>; Tue,  1 Apr 2008 18:06:35 +0000 (UTC)
	(envelope-from mfouts@danger.com)
Received: from danger.com (exchange3.danger.com [10.0.1.7])
	by mx.danger.com (Postfix) with ESMTP id 88086403750;
	Tue,  1 Apr 2008 11:06:26 -0700 (PDT)
X-MimeOLE: Produced By Microsoft Exchange V6.5
Content-class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
Date: Tue, 1 Apr 2008 11:06:35 -0700
Message-ID: <B95CEC1093787C4DB3655EF330984818051D19@EXCHANGE.danger.com>
In-Reply-To: <200804011748.m31HmE1h039800@apollo.backplane.com>
X-MS-Has-Attach: 
X-MS-TNEF-Correlator: 
Thread-Topic: Flash disks and FFS layout heuristics
Thread-Index: AciUIJASYk2JPFFoQSiKOw+tRD4dxgAAkzWQ
References: <20080330231544.A96475@localhost>
	<200803310135.m2V1ZpiN018354@apollo.backplane.com>
	<B95CEC1093787C4DB3655EF330984818051D03@EXCHANGE.danger.com>
	<200803312125.29325.qpadla@gmail.com>
	<200803311915.m2VJFSoR027593@apollo.backplane.com>
	<B95CEC1093787C4DB3655EF330984818051D09@EXCHANGE.danger.com>
	<200803312219.m2VMJlkT029240@apollo.backplane.com>
	<B95CEC1093787C4DB3655EF330984818051D0F@EXCHANGE.danger.com>
	<200804011748.m31HmE1h039800@apollo.backplane.com>
From: "Martin Fouts" <mfouts@danger.com>
To: "Matthew Dillon" <dillon@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 <freebsd-arch.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
	<mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 01 Apr 2008 18:06:36 -0000

If you've asked, I've missed the question.

We tend to size ram and embedded NAND the same. The latest numbers I can
discuss are several years old and were 64mb/64mb. Engineering *always*
wants more of each, but the BOM rules.
=20

> -----Original Message-----
> From: Matthew Dillon [mailto:dillon@apollo.backplane.com]=20
> Sent: Tuesday, April 01, 2008 10:48 AM
> To: Martin Fouts
> Cc: freebsd-arch@freebsd.org
> Subject: RE: Flash disks and FFS layout heuristics
>=20
> :
> :> -----Original Message-----
> :> From: Matthew Dillon [mailto:dillon@apollo.backplane.com]=3D20
> :> Sent: Monday, March 31, 2008 3:20 PM
> :>=3D20
> :> For flash storage systems competitive with hard drive storage,=3D20
> :
> :In embedded systems, it's RAM that flash storage competes=20
> with, not hard
> :
> :drive storage.
> :
> :SSD is a completely different engineering problem.
>=20
>     You know, I think I've asked this already and you don't=20
> have to answer
>     it if you don't want to, but exactly how large a flash=20
> device are you
>     working with in your embedded project(s)?
>=20
> 					-Matt
>=20
>=20