Slow disk performance on NVME over USB 3.1

Discussion in 'General Questions' started by PlanetWilson, Jan 13, 2020.

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  1. PlanetWilson

    PlanetWilson Junior Member

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    12
    I have a MacBook Pro and have installed Windows 10 on Bootcamp to an external drive. The drive is a USB 3.1 enclosure designed to house an NVMe drive (in my case a Samsung PM951 which has approx 1GB/s speeds)

    When booting natively into Bootcamp on this drive and running Crystaldisk I am getting 900MB/s read and write speeds.

    Under MacOS I have a Parallels VM setup with this drive set as the hard drive on the NVMe1 virtual interface. I only get around 150MB/s read write then.

    Anyone know why this might be or how I can speed things up?
     
    PlanetWilson, Jan 13, 2020
    #1
  2. @rTuRik

    @rTuRik Bit poster

    Messages:
    2
    Try to switch to Apple hypervisor in Virtual Machine settings (CPU and memory section) and test again
     
    @rTuRik, Jan 22, 2020
    #2
  3. PlanetWilson

    PlanetWilson Junior Member

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    12
    That is actually worse than Parallels, now getting 128MB/s
     
    PlanetWilson, Jan 24, 2020
    #3
  4. WillA2

    WillA2 Bit poster

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    I've noticed disk performance in parallels is terrible generally. Did you get anywhere with this?
     
    WillA2, Jun 4, 2020
    #4
  5. Maria@Parallels

    Maria@Parallels Problem solver

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    8,122
    Hello, did you try to switch to Apple hypervisor in Virtual Machine settings (CPU and memory section) and check?
     
    Maria@Parallels, Jun 7, 2020
    #5

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