Understanding
Drive Technology
Disk drives have come a long
way since the first PCs
A
s the computer revolution continues, we find ourselves committing more
and more information to the care of electronic systems. A vast amount of
that information is purely transitory, and the benefits of ownership are often
questionable but, despite this, it is necessary that we store it. At present we are
shipped. We take an in depth
doubling the amount of information stored every couple of years according to the
look at the development of
major analyst organisations. The problem of storage, retrieval and the fear of loss of
data have led us into a position where much of what is stored is duplicated. Rather
these drives, how they work,
than creating the paperless office, the increasingly widespread use of computers has
spawned the paper hungry office, as people insist on making copies of everything
and what you need to look
in case the computer crashes.
out for when specifying them
This fear of data loss is based on the problems of early systems and the exaggerations
for your users.
of those who had to deal with them. Despite the reliability of modern computer
systems, failures still occur, but mechanical failure represents an inordinately small
The first of a two part article.
proportion of lost data. A much more important area of data loss is that caused by
malicious acts such as those perpetrated by virus writers, industrial sabotage,
By Ian Murphy
random acts of electronic vandalism, disgruntled employees and badly written
IT Journalist
programs. Even this category pales into insignificance when compared with the
amount of data that is lost through stupidity, carelessness, and either poor training
or lack of it.
The introduction of high level languages to make application development easier
has led to programs that have become increasingly disk hungry. There are several
reasons for this poor programming skills, bad programming tools, compilers that
only do minimal code optimisation, and use of graphical user interfaces with their
massive overhead. The average user requires almost 1 GB of disk space for their
operating system and office productivity applications before allowance is even
made for their data.
On top of all this comes data gathered from the Internet, email, mailing list servers
and newsgroups. As organisations have allowed their users access to the Internet
for research purposes, they have been rocked by the amount of information that is
now being gathered. Many people still do not realise that, in order to view a Web
page, the entire contents of the page are downloaded into a temporary directory
before being displayed on your screen. In order to speed up access to Web pages
there are numerous applications that allow you to duplicate entire Web sites onto
local storage so that you can read information without incurring huge telephone
bills. Even where users have access to leased lines, these programs allow overnight
information gathering to take the stress away from day to day Internet access.
Today's Needs
To allow us to capture and store all this information, disk drives have become
increasingly larger and faster, and virtually every computer sold today is equipped
with one. The current range of low end drives already exceed the capabilities of the
high end drives from five years ago, yet storing so much information on a single
device requires an understanding of the capabilities of that device. Speed isn't
necessarily a good thing; nor is it the answer to every problem. Instead it's important
to evaluate the way your users need access to data and decide on the right disk
technology. In order to make that assessment you need an understanding not only
of older drive technologies, but also what is happening with current products and
their future development.
Update 152:July 2001
PC Support Advisor
File: B1047.1
page 13
Buying and Evaluating:Hardware
www.pcsupportadvisor.com
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