Passthrough Physical Disk to Virtual Machine (VM)

• 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,

           *-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

• 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 :

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

• add to kvm :

qm set  592  -virtio2 /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC

update VM 592: -virtio2 /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC

• check

grep Z1F41BLC /etc/pve/qemu-server/592.conf

virtio2: /dev/disk/by-id/ata-ST3000DM001-1CH166_Z1F41BLC,size=2930266584K

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