Return-Path: <linux-kernel-owner+willy=40w.ods.org@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id <S261456AbTAWTaW>; Thu, 23 Jan 2003 14:30:22 -0500
Received: (majordomo@vger.kernel.org) by vger.kernel.org
	id <S261523AbTAWTaW>; Thu, 23 Jan 2003 14:30:22 -0500
Received: from s142-179-222-244.ab.hsia.telus.net ([142.179.222.244]:41001
	"EHLO bluetooth.WNI.AD") by vger.kernel.org with ESMTP
	id <S261456AbTAWTaV>; Thu, 23 Jan 2003 14:30:21 -0500
Message-ID: <3E304597.6090600@WirelessNetworksInc.com>
Date: Thu, 23 Jan 2003 12:42:15 -0700
From: Herman Oosthuysen <Herman@WirelessNetworksInc.com>
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20021130
X-Accept-Language: en-us, en
MIME-Version: 1.0
To: John Bradford <john@grabjohn.com>
CC: linux-kernel@vger.kernel.org
Subject: Re: Expand VM
References: <200301231846.h0NIkwgu001811@darkstar.example.net>
In-Reply-To: <200301231846.h0NIkwgu001811@darkstar.example.net>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
X-OriginalArrivalTime: 23 Jan 2003 19:39:31.0665 (UTC) FILETIME=[2674D410:01C2C317]
Sender: linux-kernel-owner@vger.kernel.org
X-Mailing-List: linux-kernel@vger.kernel.org

The trouble is that you will spend so much money on the power supply, 
that the product won't make economic sense.  It would be better to just 
use a general purpose PC mother board, PSU and a UPS, since then, you 
get tremendous economy of scale.

John Bradford wrote:
>>>I've seen loads of solid state devices based on flash memory, but few
>>>that are based on battery backed DRAM :-(.
> 
> 
>>There is a good reason for that: Power consumption.
>>
>>A large SDRAM disk would require refresh logic etc.  So you will end up 
>>with something closely resembling bad notebook PC.
> 
> 
> I suppose it makes sense for portable devices, but would it really be
> that bad for desktop/server use?  I was only thinking of about a 24
> hour battery backup time - to keep the contents overnight, for
> example.
> 
> John.
> 


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/