Uploaded June 2024 | Updated September 2026, 2 weeks ago

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Proxmox Passthrough Disk Configuration

Proxmox VE is an open-source solution gaining popularity, especially since Broadcom’s VMware meltdown. It is built on top of the KVM hypervisor and can also run LXC containers. Recently, with Proxmox 8.1, you can run software-defined networking, and you have had software-defined storage capabilities with Ceph for quite some time now. It can take advantage of traditional storage, like iSCSI block-level storage, NFS, local, etc.

Disk passthrough in Proxmox is a great feature that helps optimize the performance of your virtual machines. By giving VMs direct access to physical storage devices, you can reduce latency and increase throughput.

The concept of a “proxmox passthrough disk” allows a Proxmox VM to read and write to a disk as if it were connected directly to the VM, rather than the virtual disk configuration that we traditionally know with virtual machines.

If you have a VM that you want to have high-performance access to the underlying storage, like TrueNAS, this is a great way to do that.

Identifying the Physical Disk
the following command found in the official Proxmox documentation:
pve.proxmox.com/wiki/Passthrough_Physical_Disk_to_Virtual_Machine_(VM)

lsblk |awk 'NR==1{print $0" DEVICE-ID(S)"}NR >1{dev=$1;printf $0" ";system("find /dev/disk/by-id -lname \"*"dev"\" -printf \" %p\"");print "";}'|grep -v -E 'part|lvm'

















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#passthrough #disk #proxmox