WHAT IS A SOLID
STATE DISK DRIVE?
The solid state disk drive (SSD) is one of the newer devices available
speed up your computer. It has many advantages and some disadvantages.
We will discuss them and see if the SSD is something you might be
interested in as an add-on for your computer.
The technology is as old as RAM
and flash memory, but
been brought up to date by building the SSD modules the same size and
shape (1.8 inches, 2.5 inches, and 3.5 inches) as the hard disk drive.
This allows for easy installation in the
computer replacing the existing hard drive. The electrical connections
also the same as hard disk drives, either serial (SATA) or parallel
(PATA). Thus allowing direct swap ability between the hard disk drive
(HDD) and the SSD.
- The solid state disk drive is as much as 250 times
faster than the
HDD in accessing the data, and also faster in reading and writing. This
is accomplished by not having any mechanical parts that have
positioned before the actual reading or writing is accomplished.
- Because there are no electric motors used for disk
rotation or moving
the heads, the SSD draws considerably less current than the hard disk
drive. This is an important consideration for battery operated devices
such as laptops and notepads.
- Since the solid state hard drive consists entirely
and contains no mechanical moving parts it is capable of withstanding
greater physical abuse, shock, vibrations, extremes in air pressure
- Currently the SSD can cost as much as the entire
computer system based
on a hard drive, and if you have more than one SSD this multiplies the
- The solid state disk drive does not have the
capacity of the HDD. At
the present time hard
drives are available as large as 2 terabytes, while SSD’s only have 256
gigabytes of capacity and growing.
- It becomes hard to justify using the SSD in the
average desk top
computer. On the other hand, for a server, where hundreds or even
of disk requests are being serviced, performance can be improved
greatly by switching to SSD’s. It is also easier to justify the expense
for this purpose.
- As I mentioned earlier laptop computers become an
ideal place to use
this technology. The fact that they draw less current allows for
greatly extended battery life.
- Not having to wait for the disk to get up to speed
means that the
operating system and programs load quicker, also data is moved in and
out of the solid state disk drive faster.
- Specialized applications like military, aerospace,
and rugged usage
such as construction sites are ideal for this technology. You don’t
have to be concerned about shaking or dropping the laptop.
- It is only recently that the software drivers and
an interface for the SSD became available in the operating system.
XP and Windows Vista have them in their later service packs, and also
Windows 7 has them now.
The SSD is designed around the RAM memory and flash memory. The RAM
memory acts as a buffer and communicates with the rest of the computer
at a very high speed,
while the slower flash memory remains as the permanent storage. In the
event of a power failure, an on board battery or capacitor flushes all
of the data from the volatile RAM to the non volatile flash memory for
When you look on the Internet, at some of the
suppliers of the SSD
you will see some specific pricing as well as
added information about applications. You might find this product is
something you should consider now or in the future. As a general rule
the price will come down and the data capacity will increase as time
goes by. At that time the SSD might replace the HDD.
If you would like to comment, or add any information on
this Solid State Disk Drive page, please do so. Use the Contact
Us form and we will respond as
quickly as possible. If you would like to ask any questions, use the Questions and Answers
form and an answer will be provided.
additional information about the solid state disk drive.
from this page to How to build a computer.
from this page to Assembling your computer.
from this page to Build a computer home page.