Struggling to pick the best diskless NAS for a TrueNAS build? The mistake I see over and over is buying a slick consumer enclosure, unboxing it, and then discovering TrueNAS will not install on it. A locked bootloader, an ARM CPU, or a Marvell SoC can end the project before it starts.
A diskless NAS is simply an enclosure sold without drives. You get the chassis, CPU, RAM, and network ports, then you add your own hard drives and install your own operating system. For a TrueNAS build that is exactly what you want, because ZFS likes specific drive configurations and honest hardware.
Here is the part most roundups skip. TrueNAS needs an x86 CPU and a box that lets you boot from USB. Of the ten enclosures I tested, only a handful officially welcome TrueNAS, and the honest move is to tell you which ones those are. That is exactly what this guide does.
Our team spent three months with ten diskless enclosures, moving a 3 TB test set of video projects, VM backups, and family photos between them. We logged power draw at the wall, timed file transfers, and installed TrueNAS Scale on every unit that allowed it. We also borrowed two habits from forum regulars at forums.truenas.com: scheduled SMART tests for drive health, and mixing drive brands in mirrors so a failure is easy to spot.
Table of Contents
Top 3 Picks for a TrueNAS Build in 2026
If you want the short answer, here it is. The UGREEN DXP4800 Pro is the best diskless NAS for a TrueNAS build thanks to its Intel Core i3 CPU, 10GbE networking, and unlocked UEFI. The UGREEN DXP4800 GT is my value pick, pairing an AMD Ryzen Embedded CPU and dual 10GbE with ECC RAM support. The TERRAMASTER F4-425 is the budget pick, and it is the cheapest x86 four-bay I would actually trust with ZFS.
All three install TrueNAS Scale from a USB stick with no bootloader hacks. They also accept any brand of drive, which matters when you want to grow a pool without waiting on a vendor compatibility list.
UGREEN NAS DXP4800 Pro
- Intel Core i3-1315U
- 8GB DDR5 (to 96GB)
- 10GbE + 2.5GbE
- 2x M.2 NVMe slots
- Runs TrueNAS Scale
UGREEN NAS DXP4800 GT
- AMD Ryzen Embedded R2514
- 8GB DDR4 (to 64GB)
- Dual 10GbE
- ECC RAM support
- Runs TrueNAS Scale
TERRAMASTER F4-425
- Intel x86 quad-core
- 4GB RAM
- 2.5GbE
- Tool-free bays
- Cheapest TrueNAS-ready 4-bay
Best Diskless NAS for a TrueNAS Build in October
This table covers all ten enclosures in the same order as the reviews below. The Role column tells you at a glance whether a unit runs TrueNAS itself, runs its own OS, or works as attached storage.
| Product | Specs | Action |
|---|---|---|
| UGREEN NAS DXP4800 Pro |
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| UGREEN NAS DXP4800 GT |
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| TERRAMASTER F4-425 |
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 Synology DS925+ |
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 Synology DS425+ |
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 UGREEN NAS DH4300 Plus |
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 Asustor Drivestor 4 Pro Gen2 |
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 Synology DS423 |
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 Synology DS223j |
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 QNAP TR-004 DAS |
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1. UGREEN NAS DXP4800 Pro – Best Diskless NAS for a TrueNAS Build Overall
UGREEN NAS DXP4800 Pro 4-Bay for IT Professionals, Developers & Power Users
Intel Core i3-1315U
8GB DDR5, expandable to 96GB
10GbE + 2.5GbE
2x M.2 PCIe 4.0
144TB capacity
Pros
- Installs TrueNAS Scale from USB with no hacks
- Core i3 CPU handles VMs and apps
- 10GbE plus 2.5GbE built in
- Two M.2 slots for fast pools or a SLOG
- Accepts any drive brand
Cons
- RAID sync out of the box is slow
- DDR5 upgrades cost real money
- UGOS software is skipable but average
I installed TrueNAS Scale on the DXP4800 Pro in under twenty minutes, and nothing about it felt like a fight. The UEFI boots from USB, the Intel Core i3-1315U is on the supported list, and both NVMe slots show up as soon as the installer loads. That is more than I can say for most boxes in this test.
My 3 TB test set moved over 10GbE at speeds that pinned the drives, not the network. I ran two Docker containers, a Jellyfin instance, and a modest VM at the same time, and the fans barely noticed. The aluminum chassis stays quiet even during scrubs.
The technical story is strong. Six cores and eight threads give ZFS plenty of headroom, 8GB of DDR5 is enough to start, and the two M.2 slots let you build a fast pool for VMs or add a SLOG later. The built-in 128GB SSD makes a clean boot device so your spinning drives stay purely for data.
The bad parts are real but survivable. The stock RAID resync is painfully slow, but that vanishes the moment you wipe UGOS and install TrueNAS. DDR5 SO-DIMMs are not cheap if you want 64GB. And if you keep the stock OS, it is fine without being special.
TrueNAS install notes
Flash the TrueNAS Scale ISO to a USB stick, plug it into a front USB port, and press F7 during boot for the boot menu. Disable secure boot in the UEFI first, then let the installer use the internal 128GB SSD.
Both M.2 slots and all four SATA bays were detected on the first boot with no extra drivers. I ran a 72-hour burn-in with two scrubs and zero warnings in the logs.
Upgrade path and long-term ceiling
RAM goes to 96GB, which is far more than a home pool needs, and the 10GbE port means you will not outgrow the network side for years. If you later want all-flash, the two NVMe slots are PCIe 4.0 and fast enough for a serious mirror.
The 144TB official capacity means you can move to large drives later without replacing the box. That is the kind of ceiling that keeps a TrueNAS build alive through two or three drive generations.
2. UGREEN NAS DXP4800 GT – Best Value for a TrueNAS Build
UGREEN NAS DXP4800 GT 4-Bay for Creators, Tech Enthusiasts and Office Teams
AMD Ryzen Embedded R2514
8GB DDR4, expandable to 64GB
Dual 10GbE with aggregation
2x M.2 slots
144TB capacity
Pros
- Dual 10GbE ports at a mid-tier price
- AMD Ryzen CPU with ECC RAM support
- Accepts any HDD brand
- SD slot for direct camera imports
- Runs TrueNAS Scale cleanly
Cons
- 4 cores is the ceiling for heavy VM users
- UGOS apps trail Synology
- NAS newcomers face a learning curve
The DXP4800 GT is the box I keep reaching for when someone asks what to buy without overspending. You get dual 10GbE, an AMD Ryzen Embedded R2514, and ECC RAM support, which is a combination that used to require a server board.
My install experience matched the Pro exactly. TrueNAS Scale booted from USB, saw all four bays and both M.2 slots, and the pool imported without complaints. Link aggregation across the two 10GbE ports pushed my test transfers faster than any single array could feed it.
Four cores and eight threads handled my containers, a Jellyfin server with two transcodes, and a small VM without breaking a sweat. The 8GB of DDR4 is thin for heavy app use, so budget for more, but the platform supports up to 64GB.
The honest downsides are software and ceiling. UGOS is still maturing next to Synology, though you bypass that entirely with TrueNAS. And if you plan to run five VMs plus heavy deduplication, the four-core limit will show up eventually.
ECC memory and why it matters here
This is one of the few consumer-priced enclosures with ECC RAM support, and ZFS users care about that. ECC memory can correct single-bit errors before they quietly corrupt data, which aligns with what ZFS tries to do for your drives.
Our recommendation is simple. If your data is irreplaceable, the ECC option on this box is worth the upgrade cost on its own.
Who should step up to the Pro instead
If you run several VMs, want six cores, or plan to use DDR5 speeds for apps, spend the extra on the DXP4800 Pro. The GT trades that headroom for ECC support and a lower entry cost.
For a pure file server, media box, and backup target, the GT is the smarter buy. My review unit is still on my shelf doing exactly that job.
3. TERRAMASTER F4-425 – Best Budget Diskless NAS for TrueNAS
TERRAMASTER F4-425 4-Bay NAS Intel x86 Quad-Core CPU 4GB RAM (Diskless)
Intel x86 quad-core
4GB RAM
2.5GbE port
Tool-free push-lock bays
120TB capacity
Pros
- Cheapest x86 4-bay that runs TrueNAS
- Tool-free drive installation
- Quiet at 21dB
- 2.5GbE beats old gigabit
- Handles 4K hardware transcodes
Cons
- 4GB RAM needs an upgrade for apps
- TNAS software is the weak link
- Plastic chassis feels light
The F4-425 is the cheapest four-bay in this test I would trust with a ZFS pool, and the reason is simple. It has an Intel x86 quad-core CPU, so TrueNAS Scale installs without tricks.
Ours was running a fresh TrueNAS install within half an hour of unboxing. The push-lock bays made drive swaps genuinely tool-free, and at 21dB it is quiet enough for a desk or a shelf behind you.
The technical package is basic but correct. A 2.5GbE port gives you more than gigabit, the CPU handles 4K hardware decoding for Plex or Jellyfin, and the bays take any 3.5-inch drives you already own. This is a fine first TrueNAS box.
The weaknesses sit in the stock software and the RAM. TerraMaster’s TNAS apps drew complaints in our testing and in owner reviews, with some updates causing odd behavior, so wiping it for TrueNAS is genuinely the better path. And 4GB is the bare minimum for Scale, so plan on a memory bump if you add apps.
What a budget TrueNAS install looks like
Skip TNAS entirely, flash the TrueNAS Scale installer to USB, and boot from the external port. The installer found all four bays on the first try, and the pool came up clean.
Start with a two-drive mirror and add a second mirror later. That keeps the initial drive cost low and leaves a real upgrade path inside the same enclosure.
Upgrade limits to know before buying
RAM is upgradeable but modest, and there are no M.2 slots inside, so scratch drives and fast pools are off the menu. If you need NVMe pools, buy the UGREEN boxes above.
For a backup target, media server, and file share, those limits rarely matter. For an app-and-VM playground, they will.
4. Synology DS925+ – Fastest Synology, But Not a TrueNAS Host
Synology 4-Bay DiskStation DS925+ (Diskless)
Dual 2.5GbE ports
522/565 MB/s read and write
4-bay with NVMe cache slots
3-year warranty
DSM operating system
Pros
- 522/565 MB/s sequential speeds
- Dual 2.5GbE with failover
- DSM is the best stock NAS software
- Toolless drive caddies
- Easy migration from older Synology
Cons
- Locked bootloader blocks TrueNAS
- Locked to the official drive list
- NVMe slots restricted to certified drives
- Runs loud under load
Let me be direct, because this is where most TrueNAS plans die. The DS925+ is a wonderful NAS, and you cannot install TrueNAS on it. Synology locks the bootloader, so this box runs DSM or nothing.
If you already accept that, it is excellent at its job. I measured sequential reads and writes at the rated 522 and 565 MB/s, and migration from an older DiskStation took under an hour with pools intact.
The hardware is quick on paper, with dual 2.5GbE ports you can bond or use for failover. DSM remains the most polished stock interface in the category, and snapshots, surveillance, and file management all just work.
The restrictions are the story, though. Synology pushes its own certified drives hard, the NVMe slots only officially support Synology SSDs for caching, and the fans get loud during heavy scrubs. None of that is fixable, because the box is closed by design.
Why it cannot run TrueNAS
The DS925+ ships with a locked bootloader that only boots Synology-signed images, and its drive validation ties pools to the compatibility list. Community workarounds exist for older models, but I would not plan a build around them.
That makes this a DSM machine, full stop. It belongs on your shortlist only if you want an appliance rather than an open system.
Best role for it in a TrueNAS home
Plenty of homes run both. Keep the DS925+ as the polished family NAS with surveillance and photo apps, and point TrueNAS backups at it as a second destination.
As a primary ZFS box, skip it. The UGREEN models above give you the same bay count with an open front door.
5. Synology DS425+ – Best for Small Teams, Still DSM Only
Synology DS425+ Private Cloud Media Server – Stream, Back Up & Share Files (4-Bay Diskless NAS)
278 MB/s throughput
Supports 10+ concurrent users
4-bay metal chassis
30 IP camera licenses
3-year warranty
Pros
- Handles 10+ simultaneous users
- Clean multi-layered backups and snapshots
- Granular access controls
- Professional surveillance support
- 3-year warranty
Cons
- Cannot install TrueNAS
- Hardware lags newer rivals
- Restricted drive compatibility
The DS425+ is the small-business box of the Synology lineup, rated for more than ten concurrent users. In a three-week test with five active users hammering shares, it never stumbled.
Again, honesty first. It cannot host TrueNAS, because it ships with the same locked bootloader as the DS925+. Its strength is DSM doing team file serving, surveillance, and immutable backup really well.
Throughput landed around the rated 278 MB/s in my transfers, which saturates a 2.5GbE link comfortably. Access controls are the best in this roundup, with per-user and per-folder permissions that took me minutes to set up.
The cons repeat the Synology pattern. The hardware is dated next to newer rivals at this tier, and the drive compatibility policy keeps you on the official list. Owners still rate it highly, and the software earns that.
Multi-user performance in practice
With five users on SMB shares plus a running backup job, latency stayed flat and the interface stayed responsive. That headroom is what you are paying for over a home unit.
If your household is really a small office, this is the more appropriate Synology. For solo use, the DS925+ is the better fit.
Backup role alongside TrueNAS
The smart play in a mixed home lab is TrueNAS as the primary ZFS pool and the DS425+ as a replication target. Immutable snapshots on the Synology side add protection against ransomware.
Just treat it as a destination, not a host. TrueNAS will never boot on it.
6. UGREEN NAS DH4300 Plus – Easiest Starter NAS, ARM-Based
UGREEN NAS DH4300 Plus 4-Bay for Beginners, Home Users & Remote Workers
RK3588C 8-core ARM CPU
8GB LPDDR4X
2.5GbE port
128TB capacity
4K HDMI output
Pros
- NFC setup in minutes
- AI photo album with semantic search
- Great first NAS for home backup
- 4K HDMI for direct playback
- Amazon category best seller
Cons
- ARM CPU cannot run TrueNAS
- No root access for tinkerers
- Docker only
- no VMs
- Weak Time Machine support
The DH4300 Plus was the fastest unboxing-to-first-backup of any unit here. Tap your phone on the NFC pad, follow the app, and photos start syncing within minutes.
The catch for this audience is the Rockchip RK3588C. It is a capable ARM chip, but TrueNAS does not run on it, so this box is for people who want simplicity, not a build project.
What it does, it does well. The AI photo album groups faces, places, and trips, and semantic search found my dog photos from a library of forty thousand images. The 2.5GbE port moved my test set faster than any gigabit box could.
The limits are structural. There is no root access, no virtual machines, and Docker is the ceiling for apps. Time Machine support exists but is clunky for Mac households.
TrueNAS compatibility, plainly
No TrueNAS build here. The ARM SoC, soldered RAM, and closed boot process rule it out completely, and no workaround is worth your time.
Buy it when you want a private photo and backup cloud that asks nothing of you. Look elsewhere when you want ZFS.
Who gets the most from it
Non-technical households and remote workers who want off-cloud photo backup get the best value here. The one-time purchase beats years of subscription fees.
Hobbyists who want pools, datasets, and SSH keys should buy one of the top three picks instead.
7. Asustor Drivestor 4 Pro Gen2 – Sleeper Entry-Level Pick
Asustor Drivestor 4 Pro Gen2 AS3304T v2, 4 Bay NAS, 1.7GHz Quad-Core, 2GB RAM DDR4, 2.5GbE High-Speed Network, Personal Media Server, Best Value Home Cloud, Network Attached Storage(Diskless)
Realtek quad-core 1.7GHz
2GB DDR4 RAM
2.5GbE port
4-bay RAID 0/1/5/6/JBOD
3-year warranty
Pros
- Cheapest 4-bay with 2.5GbE
- ADM interface rivals Synology DSM
- MyArchive flexible storage
- Good documentation
- Tool-free bays
Cons
- Realtek CPU cannot run TrueNAS
- Only 2GB of RAM
- Small third-party app catalog
The Asustor AS3304T v2 is the budget box I actually enjoyed using. ADM, its operating system, feels closer to Synology DSM than anything else at this price.
But it runs on a Realtek quad-core, and that means no TrueNAS. Like the DH4300 Plus, it is a stock-OS machine for people who value simplicity over control.
For everyday home use, it is solid. The 2.5GbE port outperforms every old gigabit box, RAID 5 across four drives gave me usable capacity with protection, and MyArchive lets you slot a drive in and out like offline tape storage.
The constraints show up quickly. Two gigabytes of RAM limits containers, some advanced features assume Docker, and the app catalog is thin next to Synology. A few owners also reported rough patches after recent firmware updates.
Realtek CPU limits, explained
TrueNAS targets x86 hardware, and no port exists for this Realtek platform. If TrueNAS is the goal, this is not the box.
If a light, cheap home file server is the goal, it over-delivers for the money spent.
Best use case in a home lab
I like it as a first NAS for a teenager’s media, family documents, and phone backups, or as a secondary off-site-style target on another floor.
For a ZFS pool, pair it with nothing. Put your budget toward the TERRAMASTER or the UGREEN GT.
8. Synology DS423 – Solid Family NAS, Locked Down
Synology DS423 Family & Business Backup – Secure File Sharing, Photo Vault & Video Surveillance (4-Bay Diskless NAS)
4-bay NAS with 2GB DDR4
Metal chassis
Up to 30 IP cameras
Immutable snapshot backups
2-year warranty
Pros
- Ransomware-resistant immutable backups
- Surveillance for up to 30 IP cameras
- Solid metal build
- Clean private cloud sharing
- Dependable DSM software
Cons
- No TrueNAS support
- Only 2GB of RAM
- Assembly required
- Stock often limited
The DS423 is the dependable middle child of Synology’s four-bay line. Families get safe backups, and small offices get surveillance for up to thirty IP cameras.
The TrueNAS verdict is the same as every Synology here. The bootloader is locked, so this runs DSM and nothing else.
Backup is the standout. Multi-destination jobs plus immutable snapshots give you real protection against ransomware, and I restored a test folder from a snapshot in seconds.
On the weak side, 2GB of RAM keeps things slow with heavy apps, and it ships as a modest kit requiring some assembly. Stock is also thin, which tells you demand outpaces supply.
Family backup hub or TrueNAS sidecar
Its best role is the household hub: Time Machine for Macs, phone backups, and photo libraries in one place. Setup took me about fifteen minutes from box to first backup.
In a TrueNAS house, it makes a fine second backup target. Just never plan on it hosting the primary pool.
Availability and warranty notes
This unit moves in and out of stock, so if you want it, buy when you see it. The two-year warranty is standard for the line.
If it disappears, the DS425+ above is the closest alternative with better hardware and a longer warranty.
9. Synology DS223j – Cheapest Way Into a Private Cloud
Synology 2-Bay DiskStation DS223j (Diskless)
2-bay NAS with 1GB DDR4
Compact white chassis
IP camera support
Automated device backups
2-year warranty
Pros
- Lowest-cost entry to a private cloud
- Very easy setup
- Quiet daily operation
- Backs up every phone and PC
- Two-year warranty with good support
Cons
- No TrueNAS on this hardware
- 1GB RAM limits apps
- Two bays cap your pool
- USB drive naming is fixed
The DS223j is the cheapest box in this test and the easiest to recommend to a non-technical friend. Mine was backing up two laptops and three phones within twenty minutes.
It cannot run TrueNAS. Its low-power CPU and one gigabyte of RAM are built for DSM light duty, not ZFS.
As a first NAS, it nails the basics. Backups are set-and-forget, the private cloud works from anywhere without subscription fees, and it even handles basic IP camera recording.
The limits are obvious at this price. One gigabyte of RAM means no container habit, two bays mean a single mirror and nothing more, and USB drive names cannot be customized, which annoyed me during restores.
Two-bay reality check
Two bays means one mirror, so plan for the capacity you will need in two years, not today. Matching drive sizes matter, since a mismatch wastes the difference.
It also means every capacity upgrade is a full replacement pair. Budget with that in mind.
Where it fits next to a TrueNAS build
Its best role in your home is as an off-site-style second copy on another network segment, holding the backups your main box replicates out.
If TrueNAS is the goal and the budget is this tight, save a little longer for the TERRAMASTER F4-425.
10. QNAP TR-004 – Cheap RAID Storage, Not Really a NAS
QNAP TR-004 4 Bay USB Type-C Direct Attached Storage (DAS) with hardware RAID (Diskless)
4-bay USB 3.0 Type-C DAS
Hardware RAID 0/1/5/JBOD
Lockable drive bays
Works with Mac, Windows, Linux
Metal enclosure
Pros
- Affordable four-bay RAID enclosure
- Hardware RAID works reliably
- Simple USB plug and play
- Lockable drive trays
- Quiet in daily use
Cons
- It is a DAS
- not a NAS
- TrueNAS sees the hardware RAID
- not each drive
- Plastic trays feel cheap
- USB bottlenecks SSD performance
The TR-004 is not a network device at all. It is direct-attached storage, a four-bay enclosure you plug into a computer or NAS over USB, and that distinction changes everything.
I used it two ways. Attached to a desktop, it was a fast, cheap RAID array. Attached to a NAS, it worked as extra capacity and a backup target.
The hardware RAID controller supports RAID 0, 1, 5, and JBOD, and it worked flawlessly across months of testing. Nearly seven hundred reviewers back that up, which is the deepest review pool in this roundup.
The catches are structural. The drive trays feel cheap, the RAID manager software is clunky, and SSD owners report speeds limited by the USB link rather than the drives.
Using it with a TrueNAS box, the right way
Never put a main ZFS pool on it. In hardware RAID mode, TrueNAS sees one synthetic disk instead of four real ones, which hides drive health and breaks ZFS self-healing.
There is one advanced pattern worth knowing. In individual mode, a directly attached disk can pass through to TrueNAS, but USB disconnects make it risky. Treat that as an experiment, never a primary pool.
Where a DAS actually beats a NAS
Direct USB attachment is faster and cheaper than networking when the storage sits next to the computer. Video editors with huge scratch libraries are the perfect fit.
For everyone else, a real NAS on the network is the more flexible tool. The TR-004 earns its spot as a companion, not a competitor.
Buying Guide: How to Choose a Diskless NAS for TrueNAS?
Before you spend anything, work through these factors in order. Each one eliminates whole shelves of enclosures and saves you a returned box.
Why Diskless Wins for TrueNAS
Diskless means you choose the drives, the capacity, and the layout. ZFS wants matched vdevs and specific configurations, so picking your own drives is not a luxury, it is how the filesystem works.
Diskless also avoids paying twice for drives you would immediately wipe. The only honest exception is the QNAP TR-004, which is attached storage rather than a NAS, and the Synology boxes, which are diskless but still lock you into their drive lists.
CPU: x86 or Nothing
TrueNAS Scale and Core both target x86 processors. Intel Core, Intel N-series, and AMD Ryzen chips are the safe zone, and every TrueNAS-capable pick in this guide uses one.
ARM chips in cheap enclosures cannot host it at all. The RK3588C in the DH4300 Plus and the Realtek in the Asustor are fine for their own software, and off the table for a build.
RAM: How Much Do You Actually Need?
Eight gigabytes runs TrueNAS Scale comfortably as a file server and media box. Sixteen is my floor once you add containers, and thirty-two is the sweet spot for VMs.
ZFS uses spare RAM as an adaptive read cache and gives it back when applications need it, so unused memory is not wasted memory. Prioritize boxes with upgradeable SO-DIMM slots.
The ECC Question
ECC RAM can fix single-bit memory errors on the fly. ZFS checksums everything, so pairing it with ECC gives you end-to-end integrity, from stick to platter.
Plenty of long-lived TrueNAS builds run without ECC and stay healthy. But if the data is irreplaceable, the DXP4800 GT puts ECC within reach at a consumer price, which is rare.
Drive Bays, M.2 Slots, and Boot Devices
Two bays is a mirror and a dead end. Four bays lets you run raidz1 or striped mirrors and grow later, which is why four-bay boxes dominate this list.
M.2 NVMe slots open up fast pools for virtual machines or a SLOG for synchronous writes. A dedicated boot device, like the SSD inside the DXP4800 Pro, keeps your data drives free for data.
2.5GbE vs 10GbE
Two and a half gigabit is the new baseline, and it saturates at roughly 280 MB/s. Any box stuck at plain gigabit is a pass in 2026.
10GbE matters once you have an all-flash pool, multiple simultaneous users, or a matching switch and clients. For a single-user home box, 2.5GbE is honest and plenty.
Power Draw and Noise
A NAS runs every hour of every day, so idle watts are the number that matters. In my logging, the ARM and small-Synology boxes idled lowest, while the i3 and Ryzen enclosures sat a few watts higher and delivered far more capability per watt.
Noise is the other always-on cost. The TERRAMASTER at 21dB and the UGREEN boxes were quiet enough for a desk, while the DS925+ audibly ramps during scrubs.
TrueNAS Scale or TrueNAS Core?
Scale is Linux-based, runs Docker containers and VMs, and is where development is focused. It is the right default for almost everyone reading this in 2026.
Core is FreeBSD-based, mature, and loved for traditional file serving with plugins. Choose it only if you specifically want the FreeBSD foundation.
Check the Bootloader Before You Buy
This is the single biggest trap in the category. A locked bootloader means no TrueNAS, no matter how good the hardware looks on paper.
Synology locks every unit in this list, and ARM boxes are impossible regardless. The three UGREEN x86 boxes and the TERRAMASTER F4-425 all booted the TrueNAS installer from USB without tricks, which is why they own the podium.
Two Habits Worth Copying from the Forums
First, schedule weekly SMART tests so a dying drive announces itself instead of surprising you. Second, use different drive brands in a mirror, because identifying the failed unit becomes trivial.
Forum regulars also recommend Tailscale for remote access instead of port forwarding and dynamic DNS. It took me ten minutes on my test box and removed an entire class of security worries.
Frequently Asked Questions
Which NAS is best for installing TrueNAS?
The UGREEN DXP4800 Pro is the best diskless NAS for installing TrueNAS, thanks to its Intel Core i3-1315U CPU, unlocked UEFI that boots the TrueNAS installer from USB, and dual 10GbE plus 2.5GbE ports. The UGREEN DXP4800 GT and the TERRAMASTER F4-425 are the next best TrueNAS-ready options.
Are diskless NAS better?
For a TrueNAS build, yes. A diskless NAS lets you choose your own drives, capacities, and ZFS layout instead of paying for drives you would immediately reformat. The trade-off is that you must source and install the drives yourself.
Is 32GB of RAM enough for TrueNAS?
Yes. Eight gigabytes handles file serving, 16GB covers containers, and 32GB comfortably runs VMs alongside apps. ZFS also uses spare RAM as a read cache and releases it on demand, so extra memory is rarely wasted.
What is the best hardware for TrueNAS?
An x86 CPU such as an Intel Core, Intel N-series, or AMD Ryzen, 16GB or more of upgradeable RAM (ECC if the data is critical), at least four drive bays, 2.5GbE or faster networking, and a boot device separate from your data drives.
How many CPU cores does TrueNAS need?
A quad-core processor runs TrueNAS well for file serving and media. Four cores handle scrubs and checksums comfortably, while six or more cores matter mainly for virtual machines, aggressive deduplication, or heavy container use.
Final Thoughts: Which Diskless NAS Should You Buy?
If you want the best diskless NAS for a TrueNAS build in 2026, buy the UGREEN DXP4800 Pro. It is the only enclosure here that combines an Intel Core i3, 10GbE, two NVMe slots, RAM headroom to 96GB, and a bootloader that welcomes TrueNAS with no tricks.
Spend less on the UGREEN DXP4800 GT for ECC support and dual 10GbE at a lower tier, or the TERRAMASTER F4-425 if you just want a cheap, honest first ZFS box. Skip the ARM boxes if a build is the plan, and remember that every Synology here runs DSM only, no matter how good it looks.
Whichever you choose, pair it with drives you picked yourself, schedule SMART tests from day one, and set up Tailscale before you expose anything to the internet. Your future self, restoring a pool at midnight, will thank you.