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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsTrueNAS can run as a virtual machine on Proxmox, so one host can take over work that used to require two machines. But that proves the arrangement is possible, not that it is safe for every storage workload: TrueNAS warns against virtualized deployments for production or critical data and specifically cautions against building a pool on virtual disks.
What combining TrueNAS and Proxmox changes
Putting TrueNAS inside a Proxmox VM consolidates the compute hosts: Proxmox runs on the physical machine, and TrueNAS runs as a guest alongside any other virtual machines or services. It does not make the storage layer disappear. The TrueNAS VM still needs reliable access to its pool drives, enough allocated resources, and a recovery path that works if the Proxmox host fails.
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Whether the change is worthwhile depends on more than the number of machines. Direct access to physical drives or a storage controller, resource contention, failure domains, and backup and recovery complexity all matter. Power, noise, cost, and performance improvements should be treated as measured outcomes of a particular build, not as guaranteed benefits of virtualization.
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Yes. The TrueNAS installation documentation lists Proxmox among the virtual-machine platforms on which TrueNAS can be installed. Its example minimum VM settings include 8 GB of RAM and separate virtual disks for the operating system and data. That is an installation example, not a complete sizing recommendation or endorsement of virtual disks for a production storage pool. TrueNAS installation documentation
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What TrueNAS says about production use
TrueNAS’s Hardware Guide draws an important distinction between a proof of concept and a dependable storage deployment. It states: “While you can deploy TrueNAS in a virtual environment, it is not safe for regular deployment of TrueNAS when storing production or critical data.” The guide also says that using virtual disks for a pool in its proof-of-concept configuration is unsupported and might result in data corruption. This is TrueNAS’s guidance about the configuration; it does not establish that a particular virtualized system has failed. TrueNAS Hardware Guide
The guide is current development documentation, modified September 11, 2026. Because guidance can vary by release, check the documentation version selector for the stable TrueNAS release you plan to run rather than assuming development guidance applies unchanged to every installation.
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How disks should reach the TrueNAS VM
For a virtualized setup, TrueNAS advises passing physical disks through to the VM, or passing through the complete storage controller when possible. This gives the guest a direct path to storage hardware rather than presenting pool drives as ordinary virtual disks. Controller passthrough depends on platform support, such as Intel VT-d or AMD-Vi, and on the actual host and controller topology.
- Identify the storage layout. Work out which physical drives belong to the TrueNAS pool and whether they are connected through a dedicated controller or a controller shared with the host.
- Check passthrough support. Confirm that the CPU, motherboard, firmware, and storage controller support the required PCIe passthrough features, including VT-d or AMD-Vi where applicable.
- Choose the passthrough boundary. Pass through the full controller when the hardware arrangement permits it; otherwise, determine whether the individual physical disks can be passed through safely. Avoid treating virtual disks as equivalent to direct physical access.
- Plan for recovery before moving data. Document how the pool will be accessed and restored if the Proxmox host, controller, or VM configuration is unavailable. Keep backups separate from the host and pool they are intended to protect.
How much RAM and storage does the host need?
TrueNAS’s current Hardware Guide lists a minimum physical configuration of an x86_64 CPU, 8 GB of memory, a 20 GB SSD boot device, and two identically sized devices for a single pool. Those are baseline TrueNAS figures, not a guarantee that the same machine can run Proxmox, a TrueNAS VM, and other workloads comfortably. The installation guide’s example of 8 GB RAM for a VM likewise does not size a combined production workload. TrueNAS Hardware Guide
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When sizing a consolidated host, account for memory and storage needs across all guests and services, not just the TrueNAS minimum. Leave room for competing workloads, and verify the exact release’s requirements and your own pool and application needs before assigning resources.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What to verify before replacing two machines
A reliable recommendation depends on details that vary by build. Before moving a working storage server into a VM, establish the following for the exact deployment:
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- TrueNAS edition and release, plus the Proxmox version.
- Host memory and the amount allocated to TrueNAS and other guests.
- Physical disk and controller topology, including whether disks or a complete controller will be passed through.
- Firmware and platform support for PCIe passthrough.
- A backup and recovery plan that does not depend solely on the Proxmox host or the TrueNAS pool.
Without those details, it is possible to say that TrueNAS can be installed under Proxmox, but not to confirm that a particular consolidation is reliable, faster, cheaper, or suitable for critical data.
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