What you need to know about SSD vs Hard Disk
Since the technology is very new,
lets look at SSD vs hard disk and what these changes mean to your
computer. Yes the SSD is a faster drive, but there is much
more to a solid state hard drive than that alone. If you
understand the differences, we can make the most of this new technology.
The biggest change between how the 2 drives work is their
design. The regular hard disk has platters and a rotor that
accesses the information by using magnetism to do so. The SSD
uses firmware chips that are flashed with information. There
are no moving your parts. In a way, it's much like RAM, only
the information is not lost when the computer powers down.
SSD vs Hard Disk Speed
Although all the drive specifications are very different depending on
which drive you get, I'll compare a 1TB black edition Western Digital
Drive, which is a very good hard drive, with an OCZ Agility 2 solid
state hard drive. For those who really want to see speed the
OCZ Revodrive just about doubles the read and writes of this drive, but
since pricing doesn't really compare apples to apples, I've left it out.
Times are all peak times, the best you'll get.
|Read in MB/S
|Write in MB/S
|Access Time in ms
|Power usage in watts when used
you buy a SSD as your primary drive, make sure it is bootable as not
all solid state hard drives are. You can find this out from
the manufacturers website.
Evaluating the SSD vs Hard
There is also an additional thing that really impacts the speed of a
hard drive, when you look at the peak times above, the hard drive will
drop as it gets further toward the inside of the platter, probably down
to about 55 mb/s. A SSD will dip a bit, but only down to
about 250 mb/s. As you can see, it's actually more like 4
times the read and write speed.
Access time, when your computer requests information from the hard
drive, it needs to wait an average of 12.2ms for a hard drive, and only
.1ms on a SSD drive for the data to start flowing. It sounds
like nothing, but think of 1000 requests. The difference
becomes really obvious now. The hard drive will take 12
seconds to perform just the finding of the data, the SSD, only 100ms.
Now, if we requested a total of 1 GB of data over 1000 requests, it
would take the hard drive just over 30 seconds to make it happen.
The solid state drive would only take just over 4
seconds. With the amount of files on a computer, and the
amount of requests will make the difference really shine through.
The biggest thing to realize with a SSD is simply the size.
Typically, as of now, the price of a solid state drives is
still pricey unless you get a smaller one. To make this work
for you, get a 60GB SSD which contains your operating system and the
main programs that you use, then buy a 1TB hard drive for storage.
The single big multi media files that don't have to be loaded
at light speed.
Finally, when you look at power usage it is another attractive thing
about solid state, since they don't have moving parts, they use just
over a 1/4 of the power of the typical hard drive.
The conclusion for SSD vs hard disk is simple, the solid state drive is
superior, the only
limiting factor right now is size, but as they get more developed this
will change as well. If you need a lot of storage and aren't
rich, you'll need to stick with the traditional style hard drive.
SSD vs Hard Disk to Parts Of A Computer
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