Can a Dynamically Allocated Virtualbox VM overwrite existing files?


  1. Brds7t7
    Posts : 1,797
    Win 7 Ultimate, Win 8.1 Pro, Linux Mint 19 Cinnamon (All 64-Bit)
       New #1

    Can a Dynamically Allocated Virtualbox VM overwrite existing files?


    Hey all,

    Just wondering if setting up a Virtualbox VM with Dynamically Allocated size can overwrite files that already exist on a drive? I've set quite a few up now on an external disk (not the fastest method but storage on my internals is running a little low).

    I would assume that it doesn't overwrite existing data, but just wanted to check with you guys to make sure. :)
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  3. kado897
    Posts : 10,455
    Microsoft Windows 7 Home Premium 64-bit Service Pack 1
       New #2

    No. It's just like any other file that gets extended.
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  4. Brds7t7
    Posts : 1,797
    Win 7 Ultimate, Win 8.1 Pro, Linux Mint 19 Cinnamon (All 64-Bit)
    Thread Starter
       New #3



    Thanks Keith! I was hoping that was the case. Didn't want to overwrite and of my system images on that drive!
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  6. kado897
    Posts : 10,455
    Microsoft Windows 7 Home Premium 64-bit Service Pack 1
       New #4

    I've got close to 200GB of VMs on my external data drive and have no problems.
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  7. pparks1
    Posts : 7,878
    Windows 7 Ultimate x64
       New #5

    Nope, it can grow to X size that you specified, but only if there is sufficient free space on the hard drive to do so.
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  8. whs
    Posts : 26,210
    Vista, Windows7, Mint Mate, Zorin, Windows 8
       New #6

    Best is to use an external SSD attached to a USB3 or eSata port.
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