To mount a physical hard disk onto a VirtualBox guest, we need to first create a VMDK configuration file which points to the physical disk, and then attach this VMDK file to the VirtualBox guest.
VirtualBox running on Linux:
VBoxManage internalcommands createrawvmdk -filename ~/sdd.vmdk -rawdisk /dev/sdd
Now attach ~/sdd.vmdk to your guest as normal
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