Slow disk performance on NVME over USB 3.1

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

  1. PlanetWilson

    PlanetWilson Bit Poster

    Messages:
    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?
     
  2. @rTuRik

    @rTuRik Bit Poster

    Messages:
    2
    Try to switch to Apple hypervisor in Virtual Machine settings (CPU and memory section) and test again
     
  3. PlanetWilson

    PlanetWilson Bit Poster

    Messages:
    12
    That is actually worse than Parallels, now getting 128MB/s
     
  4. WillA2

    WillA2 Bit Poster

    Messages:
    3
    I've noticed disk performance in parallels is terrible generally. Did you get anywhere with this?
     
  5. Maria@Parallels

    Maria@Parallels Kilo Poster

    Messages:
    8,693
    Hello, did you try to switch to Apple hypervisor in Virtual Machine settings (CPU and memory section) and check?
     

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