Extremely slow Firewire 800 direct access

Discussion in 'Windows Virtual Machine' started by EricV4, Nov 22, 2021.

  1. EricV4

    EricV4 Junior Member

    When attempting to 'attach' a Firewire 800 drive to a Windows 10 VM, transfer speeds are extremely slow. When operated in its native environment (e.g., Boot Camp) the drive can deliver approximately 80MB/s throughput. When attached to a Parallels VM, throughput tops out at 20MB/s. When the same disk is attached via USB 2.0 however, throughput is around 28MB/s. This doesn't make a whole lot of sense, because Firewire 800 is approximately twice as fast as USB 2.0.

    Why is Firewire 800 so much slower than USB 2.0 in Parallels?

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