What is the nature of the defragmentation process?

I noticed that the defragmentation process notably improves the performance of the computer. I would like to know what is actually happening during this process and how often this should be done?

Here is some information and reading extra to keep entertained you:

The best place to read about the fragmentation of NTFS is the performance Guide Windows 2000 by Mark Friedman (433 page to be exact).  When you are finished, you are unlikely to have questions on whether a NTFS file system can become fragmented or not, no question on what to do about and no question about how to do so.

Microsoft indicates in their discussions of TechNet that NTFS is designed to resist fragmentation, but it is not immune to it, and that there is an advantage in many defragment a NTFS volume.

They say that although NTFS uses more advanced algorithms in the assignment of groups of files, it is not immune to fragmentation.  It is true however, that he has developed to a lesser degree than other systems of files due to its more sophisticated design, the fragmentation

It is also possible and likely that the MFT (Master File Table) will become fragmented over time, but to a lesser extent. In addition to defragmenting files, the MFT must be défragmentée as well.

Files and the MFT may become fragmented.  Any fragmentation will slow extraction and search for files and folders.  As a result, less fragmented you queue system, better it happen.

Some alleged 'experts' will tell you that the fragmentation is not possible with NTFS, but that's not true.  NTFS is designed to resist fragmentation, but it is not immune to it.

If the fragmentation was not possible to NTFS it seems unlikely that Microsoft (and others) spend so much effort to discuss how to detect, how to cope and how to prevent it.

More than ever, you'll want to know:
http://TechNet.Microsoft.com/en-us/library/cc767961.aspx

http://books.google.com/books?id=MzU3ms3les4C&pg=PA433&lpg=PA433&dq=ntfs+immune+fragmentation&source=bl&ots=OcD-H31ORc&sig=nSEYf07iqNj21eDiSHkmT_H-NzI&hl=en&ei=3jurTKCUIIK0lQeK5rCnCA&sa=X&oi=book_result&ct=result&resnum=4&ved=0CCMQ6AEwAw#v=onepage&q=ntfs%20immune%20fragmentation&f=false

Defragment the MFT, Master File Table:
http://support.Microsoft.com/default.aspx?scid=kb;en-us;174619&SD=Tech

Maintain Windows 2000 Peak Performance through defragmentation
http://TechNet.Microsoft.com/en-us/library/bb742585.aspx

Tags: Windows

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