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Microsoft Windows Server 2016 for Dell PowerEdge Systems Important Information Guide

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When NVMe device is attached to a running VM, the device is not enumerated

Description:
When NVMe device is attached to a virtual machine through Discrete Device Assignment (DDA) feature, the NVMe device is not enumerated successfully after it is hot removed and hot plugged.
Workaround:
Reattach the NVME device to the Virtual Machine.
Perform the following steps to reattach the NVMe device to the Virtual Machine:
  1. Open a Power Shell with admin privileges.
  2. After hot plugging the device, run Get-PnpDevice to identify the device and get the location path.
  3. Remove the VMHost assignable device by running the following command:
    Remove-VMAssignableDevice –locationpath $locationpath –VMName “VM-Name”

    $localtionpath is the location path from the step 2 and VM-Name is the name of the VM, where device was attached.

  4. Attach the device back to the VM by running the following command:
    Add-VMHostAssignableDevice –locationpath $locationpath –VMName “VM-Name”

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