Passtrough a hard drive from the Proxmox host to a VM

Find the hard drive & copy the UUID

lsblk -o NAME,SIZE,TYPE,FSTYPE,MOUNTPOINT,MODEL

Find the vm id

qm list

Passtrough the hard drive as scsi

qm set $vm_id -scsi2 /dev/disk/by-uuid/$disk_uuid

Restart the vm

qm reboot $vm_id

In case it should be removed

qm unlink $vm_id --idlist scsi2