Windows 8 and 8.1 Forums

SSD & Defrag

  1. #1

    SSD & Defrag


    On the subject of SSD disks, and hybrid disks (mine) I saw some posts quite a while back about defragging such disks. As a result of the acute uncertainty back then, I have never defragged my C drive hybrid. (I also have 2 x SATA drives which I do defrag monthly.)

    Can anybody update me, and presumably other members, as to whether its ok to hit defrag for these drives?

      My System SpecsSystem Spec

  2. #2


    Quote Originally Posted by elbmek View Post
    On the subject of SSD disks, and hybrid disks (mine) I saw some posts quite a while back about defragging such disks. As a result of the acute uncertainty back then, I have never defragged my C drive hybrid. (I also have 2 x SATA drives which I do defrag monthly.)

    Can anybody update me, and presumably other members, as to whether its ok to hit defrag for these drives?
    Yes it is, the SSD part doesn't hold anything defrag would touch, the rest is just an ordinary HDD. Another question is how beneficial defraging is, I haven't defraged any HDD since Win7 SP1 was installed and fragmentation didn't go past 2% yet despite autodefrag is turned off and very large amount (in TBs) of files went thru them.
      My System SpecsSystem Spec

  3. #3


    I think defragging does improve performance, but only in micro seconds. It does not hurt in reality. So its either or ................... thanks Count.
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  4. #4


    Quote Originally Posted by elbmek View Post
    I think defragging does improve performance, but only in micro seconds. It does not hurt in reality. So its either or ................... thanks Count.
    Every time you defrag your disk usage is like for a month or two of normal one. Disk has to work real hard during defrag.
      My System SpecsSystem Spec

  5. #5


    Understood. I am going to give the C drive a go now and see how it compares.
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  6. #6


    Posts : 2,690
    Windows 3.1 > Windows 10


    I always look at the Disk as a book, every time the pc reads a page, it throws it on the floor, the next time it reads the page, it has to find it..
    It is easier the find a page in a book, when it is in page order..
      My System SpecsSystem Spec

  7. #7


    Still defragging at 90% - it was a mess!
      My System SpecsSystem Spec

  8. #8


    Quote Originally Posted by KYHI View Post
    I always look at the Disk as a book, every time the pc reads a page, it throws it on the floor, the next time it reads the page, it has to find it..
    It is easier the find a page in a book, when it is in page order..
    Files don't move when red, if disk is read only there's no moving of files and no fragmentation. When a file has to be written to disk it goes to first available space and if it doesn't fit the rest is written to next available space and so on, that's when fragmentation occurs. Sometimes, some programs (like MS Office for instance) intentionally leave space empty after a data file so it can be expanded. Most data base programs do that too. It makes reading those files easier and faster, also easier to retrieve if lost in some way. Consolidating space by third party programs negates those advantages.
      My System SpecsSystem Spec

  9. #9


    Posts : 12
    Win8.1Pro


    defragmentation is a reason why during any program installation it is advised to turn off all other appliaction and install only one thing at the time. if free segments on the header path are present, a new file, no matter if it fits the segment or not, is placed there. In the latter case file is divided and the exceeded amount of information is placed in the next free segment with all the rules mentioned above until the whole file is saved. Then, reading, buffering and putting that file to the memory just last longer,because HDD is a mechanical write and read, which is slower the more movements header has to do. Sequential read is best, so that is why defgramentation is neccessary - to put all the files, not fragmented, into consecutive blocks. The best way to avoid the need to defragment a hard disk drive is to use it in a way that will cause least fragmentation possible.
      My System SpecsSystem Spec

  10. #10


    Click image for larger version
    This was state of my disks few month ago after I had to optimize disks to prove a point that since start of Win7 disks do not fragment as much as in XP and before.Up to tha last date I haven't optimized or let it auto optimize despite few TBs of files and programs going thru them.
    This is a snapshot I took just now:
    Click image for larger version
    Looks like any defragmenting is not too important in newer windows and couple of % of fragmentation is not going to show in speed. As I said before, defragmenting makes HDDs work hard and unnecessary and often defragmenting can only be harmful without much or any benefit to their or system speed and system responsiveness. Even in XP and before, less than 15% of fragmentation didn't have any effects on system speed and responsiveness. Most important (to the system) files have their own place on disk and are normally immovable and only some defragmenting programs offered to optimize them too. Some defragmenters even offer to defragment some parts during BOOT process which can slow it down considerably depending how long computer was on before boot/reboot.
      My System SpecsSystem Spec

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