View source for Passthrough Physical Disk to Virtual Machine (VM)

'''NOTE''': This guide only works for Virtual Machines, '''not''' for Container. For that see https://forum.proxmox.com/threads/container-with-physical-disk.42280/#post-203292

Before adding physical disk to host make note of vendor,serial  so that you'll know which disk to share in /dev/disk/by-id/ 

lshw on pve host after adding.  note use ''apt-get install lshw'' if lshw is not already installed.  
<pre>
lshw -class disk -class storage

...
           *-disk
                description: ATA Disk
                product: ST3000DM001-1CH1
                vendor: Seagate
                physical id: 0.0.0
                bus info: scsi@3:0.0.0
                logical name: /dev/sda
                version: CC27
                serial: Z1F41BLC
                size: 2794GiB (3TB)
                configuration: ansiversion=5 sectorsize=4096
...
</pre>

*device names like /dev/sdc should never be used as those can change. instead use /dev/disk/by-id .  check by listing all of that directory then look for the disk added by matching serial number from lshw and the physical disk :
<pre>
ls -l /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC
lrwxrwxrwx 1 root root 9 Jan 21 10:10 /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC -> ../../sda
</pre>
or try
<pre>
ls -l /dev/disk/by-id | grep Z1F41BLC
</pre>


*add to kvm :
<pre>
qm set  592  -scsi2 /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC

update VM 592: -scsi2 /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC
</pre>

* check 
<pre>
grep Z1F41BLC /etc/pve/qemu-server/592.conf

scsi2: /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC,size=2930266584K
</pre>

*stop and restart ... then configure disk from within the kvm.