How often should you run disk defrag? ?

Say 1 TB hard drive or 2 TB hard drive,  how often should you run a disk defrag? Well should it be done two or three times month or more?

Is windows 10 defrag any good or are there way better disk defrag out there?

Is there any differences how often you should run it be it a hard drive vs SSD?

11 Answers

  • 4 weeks ago

    For a hard drive, it depends on what you are doing. The thing is, hard drives retrieve and store data most efficiently when the file is kept contiguous. So, it's best to more or less keep your files in that state. If your files are in many blocks (ie not contiguous) you can thrash your drive -- the read head needs to cover large portions of the drive, and that slows everything down. And, with windows (and other operating systems) there is a lot of swapping in and swapping out of programs and data -- anything that slows the process is a nuisance.

    If you're doing a lot of creating files and loading/unloading games or applications, you need to do a regular clean-up, including emptying out your recycle bin. But, with today's huge drives (4 TBytes etc.) few people defrag their drives more than one a week.

    As for win10's defrag... it's slow and cumbersome. So, with a large capacity drive, and lowish usage, maybe one every six months...

    Note: they don't recommend defragging SSD drives. They really do have few moving parts, so the "threshing" problem isn't worth worrying about.

  • 2 months ago

    While defragmenting helps keep a hard drive in tip-top shape, it doesn't help solid-state drives (SSDs). The good news is if you're running Windows 10, Windows 8, or Windows 7, the operating system is smart enough to identify when you have an SSD, and it won't run the traditional defragmenting operation. Instead, it might run something called "optimization" to improve the performance of your SSD.

  • 2 months ago

    The biggest reason one would defrag a hard drive would be to free up contiguous disk space because executable images run best with contiguous files.  With a 1 or 2 TB hard drive, unless you keep a significant portion of the Library of Congress there, you should have enough contiguous free space for most purposes.  You might, however, want to run the defrag utility and let it decide whether you will need to run the defrag.There are third-party defraggers that will give you reports on level of fragmentation and they work quite well.  I have used DiskKeeper, for example, and it behaves nicely.

    But the truth is that most of the time, any files you create will not incur much of a problem with fragmentation UNLESS you are doing some really strange graphics.

    My advice is to use the Win10 defragger maybe once a month on a schedule so that you can leave the machine turned on and let it clean itself.

    For an SSD, you NEVER EVER IN A GAZILLION YEARS run a defragger.  It shortens the lifespan of the drive because an SSD has a large but limited number of disk writes it can execute.  Normally you should get 5 to 10 years of usage from an SSD, but running a defragger will make that SSD churn a bunch of data.

    The reason you want to defrag a file is that on an HDD you can have pieces of a file on different tracks and want to eliminate what is called "seek latency."  But an SSD doesn't have a seek arm.  There IS no seek latency.  There, it literally doesn't matter how badly fragged a file becomes, there is no latency due to physical arm movement.

  • Shadow
    Lv 4
    2 months ago

    Depends on how often you use the HDD. If often, you can run the analysis and see how much red is in the graph. If there is a lot, say more that 20%, then run a defrag. Otherwise, there's not much else that is needed to be done.

    In terms of SSD's, defrags are not required to be run on these drives because the information across the drive can be accessed at the same speed so there won't be any difference. Plus, every write to a cell in the drive is a cycle and the cells have a limited amount of cycles so you'll be shortening the SSD's life by running defrags on it.

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  • 2 months ago

    Windows 10 defrag is usualy god enough to just leave to its own devices, if you have removed/added a lot of file you may want to force a defrag..

    SSD you should trim only when needed and you should only do thid as little as needed.

    If you are looking into other programs do not do a full defrag on an SSD.

  • 2 months ago

      Hi. Win10 does an automatic disk defrag, and You should set it depending on how often You download or upload files to Your computer. If You dump a cpl hundred phone pics or vids for social media to Your computer every month, You should defrag about every 10 days. If You just browse the web & post all day then watch some movies, You can set the defrag to monthly.

       Otherwise, must defrag utilities are basically exactly the same as every other one. The purpose of the utilities is to check the drive's FAT, & move split-up files from from many different areas of the platter onto the same connected areas of the platter, all pretty much simple programming code.

      Think of it as writing with a fine-point marker on a CD. Defragging puts all the letters of each word together, instead of just writing letters everywhere & creating a master list of which one to read next.


  • Anonymous
    2 months ago

    Windows automatically defrags the drives

    on a schedule basis

    you do not need to do any manual defrag

  • keerok
    Lv 7
    2 months ago

    Do you even have to? 

    Way back when HDDs were 1GB or less it would have been easy to do. The time it would take to complete it wouldn't last a day or so. Today, with drive speeds fast enough already and sizes too big, I find defragging an inconvenience. It easier to just buy a new hard drive and copy all data to it instead. 

  • Murzy
    Lv 7
    2 months ago

    I run it every 2 weeks.

  • L.N.
    Lv 7
    2 months ago

    SSD's do not need to be defragged and Windows comes with automatic scheduled defragging turned on by default for mechanical drives. 

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