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As mentioned at the
beginning of this review, Serial ATA is
the next best thing. While there is
still wide support for ATA drives, more
and more Serial ATA have appeared on
retail shelves. Let’s have a closer
look at what Serial ATA has to offer.
At first glance at
the physical connectors of the Serial
ATA and ATA interfaces, you can
immediately see the difference between
the two. Regular ATA has a very wide
connector with a long flat ribbon
following. The Serial ATA connector is
nearly 1/3 the size of an ATA
connector. If you aren’t already aware,
sometimes connecting your hard drives to
your ATA cable sometimes can be a bit
annoying in smaller computer cases.
This is because you might have to twist
and turn it sometimes in a confined
space just to be able to reach the
connector. With a Serial ATA connector,
you can imagine that it will be much
easier to connect your hard drives and
other devices more easily.
In addition, the
smaller and thinner cable can
potentially mean better airflow within
your computer case resulting in better
cooling. If you are the kind of person
who is very conscious about the
temperature inside your computer case,
this may be one small factor to consider
with Serial ATA. Of course, this would
only make sense to those who are really
picky and like to take advantage of
things whenever they can.
If you are not
aware, ATA100 is named like that because
it can transfer up to 100MB/s. With the
current ATA100 technology, it has been
difficult to increase the data transfer
rates beyond this. That’s one reason
why you haven’t seen hard drives go
beyond a maximum of ATA133. In this
situation, it is necessary to introduce
a new technology standard that will
allow transfer speeds to reach new
heights to keep an open road of growth
in the future. This is where Serial-ATA
comes in. It uses a different signaling
method which actually helps reduce noise
when transferring data. This not only
helps in fast data transfers, but also
helps ensure that the data transferred
is accurate. Serial ATA allows transfer
speeds of 1.5Gb/s and beyond. It uses a
low voltage differential of 250mV.
Here are some of
the advantages that you can expect with
the Serial ATA technology (obtained from
“Serial ATA Interface, Frank R. Chu,
Hitachi Global Storage Technologies
Senior Engineer):
-point to point
connection, eliminating the Master/Slave
configurations
-thinner and longer
cables
-no new software
drivers are necessary for Serial ATA
Hard Drives
-low differential
voltage for signals
-interface
bandwidth starting with 150Mbytes/sec
-better connector
design for hot-plug, blind mate
applications
-32 bits CRC error
checking on all data and control
information
For those who have
had lesser experience installing a hard
drive, there is no need to set that the
little jumper which indicates whether
the drive is a master or slave drive.
From these
advantages, I can summarize that the
Serial ATA technology does provide some
benefits as well as potential. The
150Mbytes/sec is only 50Mbytes per
second faster that ATA100, but we’ll
find out how much faster it is when I
test the drive. The CRC error checking
ensures that the data you store on the
hard drive is an exact copy as intended
to be.
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