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Disk defrag discrepancy


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#1 wishmd

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Posted 02 December 2010 - 01:07 PM

I use System Mechanic for general tuneup and PerfectDisk Pro for disk defrag. PerfectDisk Pro shows my C drive 100% defragged (3% fragments in free space). When I run an analysis in System Mechanic Pro, it shows my C drive 77% fragmented. So... which is right? What might cause such a discrepancy? My system is a 3-year old Windows XP.

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#2 ThunderZ

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Posted 02 December 2010 - 02:32 PM

No two defrag programs are alike. Most all have a better idea of how a disk should be laid out for optimum performance.

#3 wishmd

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Posted 02 December 2010 - 02:54 PM

I understand about the "optimization" - but defragging is just defragging. It should have nothing to do with positioning of files! A 77% difference in fragmentation statistics is staggering! One or the other software is way off base, it seems to me.

#4 ThunderZ

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Posted 02 December 2010 - 03:16 PM

I`m beating if you ran the Windows native defrag you would get a different % again.

I do not know any other explanation.

#5 Platypus

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Posted 02 December 2010 - 03:35 PM

Just out of interest, what does the analysis in the Windows Defrag report in the same situation?

Being of the opinion that tuneup utilities are over-rated, I'm not familiar with System Mechanic. However I would suspect that it's analyzing on a very different basis to PerfectDisk, possibly including a factor like data "fragmentation" in the registry. Is there a reporting function to display exactly what System Mechanic considers is fragmented?

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