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Old 09-09-2009, 07:17 AM   #1
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Default Defrag for a Dummy

I guess,well uh...

---Please explain what defrag is

---How often I should do it

---Will it help my computer run faster

---Doesn't Windows automatically do it?

---when Windows does do it...is it a scheduled thing or as it is needed?

---do I need another Defrag program?

---are there any dangers running a defrag?


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Old 09-09-2009, 08:03 AM   #2
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Default Re: Defrag for a Dummy

first you should know what fragmentation is:

I'll try to illustrate this with an example...

imagine that you have a section of your hard disk, we'll illustrate this as being empty with twenty dashed lines


now imagine that you write a file that's five units, (bytes, MB whatever you want to think of it as, (file A)

the disk now looks like this

now you write file B, that is 2 units big


now you delete file A


now you write file D (2 units)

now write file E nine bytes

now delete file B
Write file F (four units)

you can see how bits of files are all over the place, because the disk will fill the disk in a sensible way, even if this means splitting up the files (fragmenting them) over differetn areas of the disk...

so back to your questions,

1, a defrag, is de fragmenting the files, in the above example the disk looked like this.


a defragment will go through several steps moving files in a logical order.

put file F all together

move file D
bunch file E together

then perhaps put it all at the start of the disk leaving all the free space at the end

2, there is no such thing as too often, but you don't need to do it all the time as the disk may not be fragmented enough to make a difference

3, when files are fragmented the disk head needs to scan across the disk to be able to find all the parts of a file, and when it writes it needs to scan all across the disk to find the free space. you if you reduce the amount of time taken to read/write files, yes your computer will appear to be marginally faster/smoother

4, no, windows won't do it automatically, why would it? I certainly wouldn't want to find that it was taking even longer to read and write files because windows had decided for itself that it'd like to do a little house keeping.

5, you can schedule it if you like, or you can decide to run it as and when you want to do it, personally I don't see the need to schedule it so I've never looked at how to do this. it's the kind of thing that you'll only really run once a year or so, or more often if you;re finding that things are going really slowly doing file operations

6, there is one built into windows, (right click the disk in my computer select properties, go to the tools tab). some people prefer to use third party tools and say that they work better, I can't comment as I've never tried,
what I would say is that sometimes running a defrag once doesn't de fragment files as much as you;d like so you may wish to run the de fragment process multiple times till all the disk turns blue and there are no red lines left indicating fragmented files.

7, no there are no dangers, you're not likely to loose data, of course if the power fails during a write operation then you may loose data, or corrupt the disk, but this could happen at any time.

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Old 09-09-2009, 09:10 AM   #3
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Default Re: Defrag for a Dummy

^^Root got it right. Good job.
Don't take life too seriously -- no one gets out alive. Plus, who wants to arrive to the hereafter in pristine condition wearing a suit and tie?
I want to slide in sideways, worn out, used up, hair a mess, clothes tattered, & screaming, "Whooo! What a ride!"
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Old 09-09-2009, 09:34 AM   #4
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Default Re: Defrag for a Dummy

Very nice explanation Root!

A program I would recommend to you Juan, is Smart Defrag

Free, you can set it up to auto defrag your PC while your PC is idle. Works great! You can also set it up to defrag or optimize on your schedule.

***Sheese I sound like a commercial LOL***
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Old 09-09-2009, 10:52 PM   #5
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Default Re: Defrag for a Dummy

Thanks for the great explanation.I finally understand it now.Thanks for taking the time.

Root a pedia !
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