how to start linux virtual machine on windows host using raw drives

1. open cmd.exe as administrator

cd "C:\Program Files\Oracle\Virtualbox"

c:\Program Files\Oracle\VirtualBox>VBoxManage.exe internalcommands createrawvmdk -filename "C:\Users\afx\skyblue-disk0.vmdk" -rawdisk \\.\PHYSICALDRIVE0
RAW host disk access VMDK file C:\Users\afx\skyblue-disk0.vmdk created successfully.
c:\Program Files\Oracle\VirtualBox>VBoxManage.exe internalcommands createrawvmdk -filename "C:\Users\afx\skyblue-disk1.vmdk" -rawdisk \\.\PHYSICALDRIVE1
RAW host disk access VMDK file C:\Users\afx\skyblue-disk1.vmdk created successfully.

c:\Program Files\Oracle\VirtualBox>VBoxManage.exe storageattach skyblue --storagectl "SATA" --port 0 --device 0 --type hdd --medium "C:\Users\afx\Documents\skyblue-disk0.vmdk"
c:\Program Files\Oracle\VirtualBox>VBoxManage.exe storageattach skyblue --storagectl "SATA" --port 1 --device 0 --type hdd --medium "C:\Users\afx\Documents\skyblue-disk1.vmdk"

2. start virtualbox as administrator
3. done