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How is fragmentation calculated?


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Hi,

 

I just downloaded Defraggler and analyzed a (non ssd) hard drive. According to defraggler there is 31% fragmentation.

 

The Windows 10 build-in defragmentation tool states the same drive with 0% fragmentation.

 

Why is there such a gap between those two tools?

 

Thank you for clarification.

 

Casper

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Defraggler sees locked microsoft files which windows ignores their effect on the fragmentation. At least that's how I understand it

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