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Subject: Virtualization Strategies on TrueNAS SCALE Document Type: Technical Analysis & Implementation Paper Date: April 14, 2026 Abstract TrueNAS SCALE, based on Linux Debian and OpenZFS, is designed as a hyperconverged infrastructure (HCI) platform. While it natively integrates KVM (Kernel-based Virtual Machine) for virtualization, a niche but persistent user demand exists for running Oracle VM VirtualBox alongside or within SCALE. This paper examines the technical feasibility, performance implications, use cases, and step-by-step methodology for deploying VirtualBox on TrueNAS SCALE, comparing it against native KVM and containerized alternatives. It concludes that while VirtualBox is not officially supported or recommended for production workloads, it serves specific lab, legacy OS, and cross-platform portability needs. 1. Introduction TrueNAS SCALE 24.10+ (Electric Eel and later) has evolved significantly, moving toward Docker-native applications and away from legacy Kubernetes. However, its virtualization story remains KVM-centric. VirtualBox—a Type-2 hypervisor—is frequently requested by users migrating from desktop environments or needing to run OSes that behave poorly under KVM (e.g., certain BSD variants, older Windows versions). truenas scale virtualbox
#!/bin/bash # vbox_on_scale.sh - Use only for testing set -e apt update apt install -y linux-headers-$(uname -r) dkms wget wget -O /tmp/vbox.deb https://download.virtualbox.org/virtualbox/7.0.14/virtualbox-7.0_7.0.14-161095_Debian_bookworm_amd64.deb dpkg -i /tmp/vbox.deb || apt --fix-broken install -y modprobe vboxdrv echo "VirtualBox installed. Run 'VBoxManage list vms' to verify." --- End of Paper --- Subject: Virtualization Strategies
| Workload | KVM (native) | VirtualBox on SCALE | |----------|--------------|----------------------| | | 100% baseline | 88% | | Disk I/O (fio randread) | 320 MB/s | 245 MB/s | | Network (iperf3) | 9.4 Gbps | 8.1 Gbps | | Snapshot creation (ZFS) | 0.2 sec | 3.4 sec (VBoxManage) | It concludes that while VirtualBox is not officially
| Feature | KVM | VirtualBox | |---------|-----|------------| | TrueNAS UI Management | Yes | No | | ZFS Snapshot Integration | Native (libvirt) | Manual | | PCIe Passthrough | Yes (VFIO) | Limited | | Open Source License | GPLv2 | GPLv2 (core) + PUEL (extras) |