What Happened: TrueNAS Releases Native Proxmox Storage Plugin

TrueNAS has unveiled a native storage plugin designed for Proxmox VE that automates how virtual machine disks connect to TrueNAS systems. The plugin, now available to early adopters, transforms every disk request from Proxmox into an automated OpenZFS zvol that gets published through either iSCSI or NVMe/TCP protocols. This new approach replaces older manual workflows and offers significant improvements in speed and operational simplicity.

The plugin works by intercepting VM disk provisioning requests inside Proxmox and handling all the backend work automatically on the TrueNAS side. When an administrator creates a new virtual machine disk through the Proxmox interface, TrueNAS instantly creates the underlying storage volume, manages snapshots, handles resizing, and enables migration and deletion all from Proxmox without requiring separate setup steps in the TrueNAS web console.

The Old Way: NFS and Manual iSCSI Setup

server rack hypervisor setup
Photo by U. Storsberg

Previously, most Proxmox environments running on TrueNAS relied on NFS or hand-configured iSCSI LUNs. NFS deployments forced Proxmox to create snapshots through QEMU copy-on-write files, a process that could take several minutes for large disks and potentially hours in extreme cases. Manual iSCSI setups avoided slow snapshots but required administrators to manually create a new zvol, iSCSI extent, and LUN mapping for each disk added to the system.

Neither approach provided the combination of native snapshot capability with ease of management that modern virtualization environments demand. The earlier ZFS-over-iSCSI plugin attempted to bridge this gap, but the new purpose-built solution represents a fundamental redesign for better integration and faster performance.

Why NVMe/TCP Matters for Performance-Conscious Buyers

The plugin supports two transport protocols: traditional iSCSI and NVMe/TCP. For environments where latency matters, NVMe/TCP becomes the preferred choice, offering lower overhead and faster communication between Proxmox nodes and the TrueNAS storage system. Similar to how Dell achieved breakthrough NVMe storage density, the shift toward NVMe protocols represents the industry trend toward faster, more efficient storage architectures.

NVMe/TCP requires Proxmox VE 9.x with the nvme-cli initiator installed on each hypervisor node, while iSCSI remains available for Proxmox VE 8.x deployments. This dual-protocol support means organizations can choose the transport that best fits their existing infrastructure and performance requirements.

Key Advantages for Shoppers and Operators

Storage operations now happen entirely within the Proxmox interface, eliminating the need to switch between hypervisor and storage array consoles. Administrators can create disks, take snapshots, resize volumes, migrate workloads, and delete storage all from one place. OpenZFS snapshots run natively on TrueNAS, which means snapshot operations complete faster and can capture the entire VM state including RAM content. For teams managing multiple Proxmox clusters against a single TrueNAS system, the plugin enforces logical separation by requiring one dataset and one iSCSI target or NVMe subsystem per cluster, preventing naming conflicts and keeping cluster storage isolated.

The plugin uses API key authentication rather than requiring root SSH access, improving security posture. All volumes are created as thin, sparse zvols on demand, meaning you only consume actual capacity as data grows, and file-based content like ISO images and backup directories continue to be served via TrueNAS’s native NFS and SMB shares from the same storage pool.

Compatibility and Deployment Requirements

storage array performance management
Photo by Homa Appliances

TrueNAS version 25.10 or later must run on the storage side. The plugin functions with TrueNAS Community Edition and Enterprise appliances including the H-Series and V-Series models that support high availability. Enterprise support is currently in active validation and can be ordered now through account teams, with TrueNAS recommending a design review before moving production workloads. Much like how QNAP’s NVMe series integrates RDMA support, enterprise storage integrations benefit from proper pre-deployment planning.

The plugin installs through a signed APT repository with packages for both Proxmox VE 8 and 9. The installer automatically detects your Proxmox version, runs cluster-aware health checks, and includes rollback capability. For air-gapped environments, a standalone .deb package is available.

What This Means for Your Shopping Decision

If you operate Proxmox clusters and currently store VMs on TrueNAS systems using NFS or legacy iSCSI configurations, this plugin represents a significant operational improvement. TrueNAS recommends testing the Early Adopter release on non-production clusters first to verify compatibility with your specific workloads before migrating production VMs. The combination of automated provisioning, native snapshots, and optional NVMe/TCP transport makes this plugin worth evaluating for any organization looking to streamline virtualization storage management and improve performance.