Does Windows 7 automatically defrag?

By circusboy01 ยท 13 replies
Dec 27, 2012
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  1. I have windows 7 with a 1tb. harddrive , My friend just got windows 7 with a 1tb. harddrive. He's tickled pink about all the space he has, Says he'll probabvly never run out.I emailed and told him
    that he probably wouldn't have to worry about defragging either. He emailed back and said he thought W-7 defrags automatically But I think the Hard drive space is just so big that you don't have to bother defraging. So which is it? You don't have to defrag, because the harddrive is so big , or because W-7 does it for you?
  2. Cobalt006

    Cobalt006 TS Evangelist Posts: 1,777   +242

    No you should still defrag the hard drive. Win 7 will automatically defrag it self . You can set your own time by going into the disk defragment properties.
  3. learninmypc

    learninmypc TS Evangelist Posts: 7,668   +413

    Ok & thanks for asking circusboy. I just looked at my settings & noticed its set to defrag every Wednesday @1am. Is that too often or ???
  4. gbhall

    gbhall TechSpot Chancellor Posts: 2,431   +77

    Your original thought, that a very large drive does not become fragmented, is an easy conclusion to draw (but wrong :) ). You might expect that new stuff that needs to be written just keeps on going into fresh space, which would take ages to fill up before starting again at the bottom. Is that what you thought ? Unhappily stuff is being deleted as fast as it is being written (think of your Internet data cache of maybe thousands of browser pages and images).

    But possibly due to historic reasons when hard drives were much less than 1% current sizes, that deleted space is reused before new space is taken up. Hence any particular area of the drive stores old stuff, and parts of new stuff that dont quite fit in a freshly deleted part and so becomes split into two parts or more. That is.....fragmented.

    Your present defragmentation schedule is going to happen in the early hours of the night, and will wake up your PC to do it, and probably shut down itself afterward. If the idea of that disturbs you, a monthly schedule is perfectly adequate.

    It can be educational to download an independant defragmenter such as auslogics and actually do it yourself from time to time when you can see how quickly defragmentation occurs.
    Dawn1113 likes this.
  5. learninmypc

    learninmypc TS Evangelist Posts: 7,668   +413

    Ok, my main question about defragging it is how often? Isn't once a week too often?
  6. jobeard

    jobeard TS Ambassador Posts: 11,124   +982

    I do mine manually and ONLY when I perform MS Updates.
  7. learninmypc

    learninmypc TS Evangelist Posts: 7,668   +413

    jobeard, do you use a 3rd party program?
  8. jobeard

    jobeard TS Ambassador Posts: 11,124   +982

  9. learninmypc

    learninmypc TS Evangelist Posts: 7,668   +413

    Thanks jobeard, just got it.
  10. snoop600

    snoop600 TS Rookie

    Windows 7 is supposed to ran the defrag automatically.
  11. learninmypc

    learninmypc TS Evangelist Posts: 7,668   +413

    jobeard, approxmately how long might it take to defrag this
    Just a ballpark figure.
  12. jobeard

    jobeard TS Ambassador Posts: 11,124   +982

    As I prune all possible unnecessary startups and services, it may well be that setting the Disk Defragmenter Service to Manual
    has produced the evidence I am reporting here - - but;

    I have files dated back into 4/11/2012 which are fragmented, and as they are not in my list of import / performance files, I never
    defrag them with Defraggler.

    There is no scheduled defrag on my laptop and I would conclude:

    a) the service is necessary *IF* Win/7 "automatically defrags"​
    b) a schedule must be defined to get the automatic feature (but then it's truly not automatic is it)​
    c) there's no free lunch - - nothing is automatic​

    your results be vary highly :)
  13. jobeard

    jobeard TS Ambassador Posts: 11,124   +982

    sheez, I have no reasonable answer other than the S.A "as long as it takes".
    It would take a detail analysis of number of files, total number of fragments to be relocate and the performance data for your HD+System.

    Secondly, I would not have the option [x] Allow contents to be indexed, especially during a defrag.
  14. learninmypc

    learninmypc TS Evangelist Posts: 7,668   +413

    Ok, thanks.

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