What Is A Hard Drive

So what is a hard drive?  It in the only internal component in a computer currrently that have storage without electricity.  Although the BIOS in the computer maintains information it still uses the battery on the motherboard to do so.

Without a hard disk in a computer, anytime the power would flicker, or you would have to reboot, you would lose everything.  A hard drive contains a large amount of storage where any other software is installed to.  When you open a program or file, it is usually read from a hard disk then held within RAM. 

A hard disk stores information like a tape drive, all the information is magnetically stored.  The inside of the drive contains what looks like several compact discs stacked on top of each other with a small brush riding on each side of each disc.  This brush is moved back and forth to get to any part of the disc as it spins.

What is a hard drive named SSD?  These are Solid State Drives and are the latest thing, there is no question, they are fast.  These drives do not have any moving parts.  They work more like RAM, except when you turn the power off, they hold onto their information.  They are the fastest, but they are still very new.

If you really want a fast computer, as of today, I still would not recommend getting one for the following reasons,

• It is new technology, this often means reliability can be an issue.  
• The price for the amount of storage you get is insane.  
• There is a lower cost alternative that is just as good and you will get a ton more storage.

Edit March 010

Let's take some time to thank Intel for releasing the 2nd generation of solid state drives.  What does this mean for you?  The time to start buying them is now.  The price has come down significantly and the models plagued with bugs should be gone.

Choosing a Hard Drive

When I buy a hard disk, the first thing I look for is brand name, my first choice is Western Digital, my second choice is Maxtor.  Then I just choose the fastest drive that let's me stay in my budget.  I also make sure I read the reviews about that drive so I only buy models people have success with.

For more information on benchmarking and hard disk reviews, go to both sections on the How To Build A Computer page.

Go from What Is A Hard Drive back to Parts Of A Computer
Learn how to build your own computer