What is 'defragging', and why should I do it?

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Actually in the example above, the file is created anew each time. Not sure how big it'll get, but you can get an idea by running it once.

Along the lines of my earlier question about the size of the log file, is it possible to get it so it has a date stamp.
It reports the defrag was done, but I would like for it to post the date/time of the defrag.

BTW, this trick automated defrag perfectly and now reports 0% defrag. Thanks.

defrag will not, but you could add the following lines to the sequence:

date /t >>c:\defrag.log
time /t >>c:\defrag.log

The double greater-than signs cause the test to be appended to the log.

My defragment will not work. Can you help me?

How does it "not work"?

I have tried to defrag my pc 3 times so far and it ran for over 8 hours each time but never left the 0% complete and when I click on show details, I just see a blank white screen. I have never defragged my pc before.
How long should I expect it to take?

Much less than that, for sure. You didn't say what operating system version you are running. ("blank white screen" makes me wonder - that's not how the XP defragger looks).

What happens if you run a Command Prompt, and then in that prompt, run:

defrag c:

I am having Windows 98 SE. The Defrag does swiftly all the other Drives like D, E & F but not Drive C. I wait and wait and wait nothing seems to happen. Recently I kept the system on for more than 6 hours; still no result. I have used the command option also in vain. Please help.

after i defragment i still have more then half thw bar in fragmented files,
File fragmentation
Total files = 131,712
Average file size = 624 KB
Total fragmented files = 3
Total excess fragments = 16,451
Average fragments per file = 1.12
yeah then theres,
Fragments File Size Files that cannot be defragmented
395 14.64 GB \Documents and Settings\Jake\Local Settings\Temp\~GLH0004.TMP
16,064 18.48 GB \Documents and Settings\Jake\Local Settings\Temp\~GLH0005.TMP
i dont know how to get rid of those can you please help me?

I would see what program might have those files open (this article: http://ask-leo.com/how_can_i_find_out_who_is_using_a_file_in_use.html) - if they're not in use, since they are temp files, I'd probably just delete them.

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