Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!news.mixmin.net!feeds.phibee-telecom.net!newsfeed.xs4all.nl!newsfeed2.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path: <python@mrabarnett.plus.com>
X-Original-To: python-list@python.org
Delivered-To: python-list@mail.python.org
X-Spam-Status: OK 0.015
X-Spam-Evidence: '*H*': 0.97; '*S*': 0.00; 'affected': 0.07; 'desired.': 0.07; 'odd': 0.07; 'versions,': 0.07; 'formula': 0.16; 'from:addr:mrabarnett.plus.com': 0.16; 'from:addr:python': 0.16; 'from:name:mrab': 0.16; 'message-id:@mrabarnett.plus.com': 0.16; 'range.': 0.16; 'received:192.168.1.4': 0.16; 'strength': 0.16; "would've": 0.16; 'wrote:': 0.18; 'written': 0.21; 'seems': 0.21; '(in': 0.22; 'header:User-Agent:1': 0.23; 'header:In-Reply-To:1': 0.27; 'appear': 0.29; 'sep': 0.31; "we're": 0.32; '2010.': 0.33; 'fri,': 0.33; 'level.': 0.33; 'there': 0.35; 'ram': 0.36; 'should': 0.36; 'easily': 0.37; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'anything': 0.39; 'to:addr:python.org': 0.39; 'ian': 0.60; 'ago,': 0.61; 'today': 0.64; 'deals': 0.65; 'skip:1 20': 0.65; '26,': 0.68; 'price': 0.69; 'price.': 0.74; 'trend.': 0.84
X-CM-Score: 0.00
X-CNFS-Analysis: v=2.1 cv=HNxNF+dv c=1 sm=1 tr=0 a=0nF1XD0wxitMEM03M9B4ZQ==:117 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=0Bzu9jTXAAAA:8 a=u9EReRu7m0cA:10 a=ihvODaAuJD4A:10 a=IkcTkHD0fZMA:10 a=EBOSESyhAAAA:8 a=pGLkceISAAAA:8 a=Ou8-nDE8AAAA:8 a=olFkyggq3waSuMpxMGcA:9 a=QEXdDO2ut3YA:10 a=LvUxLZ3iF9QA:10 a=MSl-tDqOz04A:10
X-AUTH: mrabarnett:2500
Date: Sat, 27 Sep 2014 16:41:55 +0100
From: MRAB <python@mrabarnett.plus.com>
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0
MIME-Version: 1.0
To: python-list@python.org
Subject: Re: Storage Cost Calculation
References: <CAH+Vmq=BO2TJvf-CUPuug_xFRGfhU7CUBSg41X40m-6eAgf-Sw@mail.gmail.com> <CALwzid=+wAxCbYD6fuVjh_O2Fkso+ZH1S7jibfefEwmfFwQ5Cw@mail.gmail.com>
In-Reply-To: <CALwzid=+wAxCbYD6fuVjh_O2Fkso+ZH1S7jibfefEwmfFwQ5Cw@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
X-BeenThere: python-list@python.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe: <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive: <http://mail.python.org/pipermail/python-list/>
List-Post: <mailto:python-list@python.org>
List-Help: <mailto:python-list-request@python.org?subject=help>
List-Subscribe: <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups: comp.lang.python
Message-ID: <mailman.14430.1411832704.18130.python-list@python.org>
Lines: 30
NNTP-Posting-Host: 2001:888:2000:d::a6
X-Trace: 1411832704 news.xs4all.nl 2865 [2001:888:2000:d::a6]:47630
X-Complaints-To: abuse@xs4all.nl
Xref: csiph.com comp.lang.python:78416

On 2014-09-27 15:30, Ian Kelly wrote:
> On Fri, Sep 26, 2014 at 12:53 PM, Abohfu venant zinkeng
> <vicezik@gmail.com> wrote:
>> This site was written by a person (in 2009) who had considered this
>> amazing trend. He collected a lot of data about hard drive capacity
>> and price. The formula he extrapolated by using the data he found
>> is
>>
>> cost per gigabyte = 10-0.2502(year-1980) + 6.304 where year is the
>> year for which the extrapolated cost was desired. This formula is
>> based on data from 1980 to 2010.
>
> A nice illustration in the perils of extrapolation. Per the formula,
> hard drives should be $0.006 per gigabyte now. I don't see anything
> on newegg.com for less than $0.03 per gigabyte; the best deals appear
> to be at the 2 TB level. And we're only 4 years out of the data
> range.
>
> It also seems odd to quantify technical advancement in a way that is
> easily affected by fluctuations in the strength of the US dollar.
>
I once did a calculation of my own about the cost of RAM.

In 1981 the BBC Micro was released. There were 2 versions, model A with
16K and model B was 32K. The price difference was £100, so that's £100
for 16K of RAM.

Today you can get 16GB of RAM for about the same price.

If you'd wanted that much RAM 30 years ago, it would've cost you £100m!