Technical reference
Zettlab D4 specifications
NAS-D4 · Rockchip RK3588 · 8-core + 6-TOPS NPU · 16GB LPDDR4X (max 16GB) · 4 × SATA + 1 × M.2 · 1×2.5GbE + 1×1GbE · HDMI 4K · ZettOS/Btrfs
Complete specifications with requirements, upgrade limits and sources. For our buying judgment, reviews and prices, return to the buying guide.
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Identity
Compute and memory
Exact D4 compute and memory records, with unknowns preserved.
| Processor | Rockchip RK3588 · 8-core + 6-TOPS NPU[1] |
|---|---|
| Factory memory | 16GB LPDDR4X[1] Factory memory is kept separate from maximum supported capacity and from seller-installed upgrades. |
| Physical CPU cores | 8[15] |
| Factory memory | 16 GB[15] |
| Host memory ECC | Unknown — no factory host-path ECC claim found[1] On-die DRAM ECC is not host ECC. Still unknown, not a confirmed no. |
| Official memory upgrade path | No — official Maximum RAM is 16GB; reviews describe non-upgradable/soldered RAM[1][2] Ultra models are the expandable siblings; do not borrow Ultra SODIMM slots. |
| Official memory limit | 16 GB[15] |
Storage and expansion
Exact D4 storage and expansion records, with unknowns preserved.
| Cataloged drive-bay count | 4[1] M.2 positions are listed separately and are not silently added to SATA bay count. |
|---|---|
| Supported drive layout | 4 × SATA HDD + M.2 NVMe SSD[1] |
| Replaceable storage drives | Yes[15] |
| M.2 expansion | Yes[15] |
| Official external drive enclosure expansion | USB/external-device backup targets exist; no official multi-bay expansion chassis[1][7] USB ports and wiki backup-to-external-device are not an eSATA/SAS expansion unit. |
| Physical M.2 slots | 1[15] |
| SATA without a mandatory model whitelist | Reference compatibility list exists; not proven as an exclusive lockout list[10] Official notice: models compiled from hardware detected on actual devices. SMR not recommended. D4/D6 do not support PWDIS. |
| M.2 without a mandatory model whitelist | Reference M.2 2280 list exists; wiki install shows one bottom-cover slot[10][9][1] Official max 4TB in the product table is a capacity claim, not a tested every-vendor guarantee. |
Network
Exact D4 network records, with unknowns preserved.
| Installed Ethernet | 1 × 2.5GbE + 1 × 1GbE[1] Multiple ports do not guarantee one client the sum of their link rates. |
|---|---|
| Fastest installed single network port | 2.5 Gbps[15] |
| Official network upgrade path | No PCIe slot on D4/D6; Standard Bridge is a software bridge, not 10GbE[1] Installed 2.5GbE+1GbE only. |
Software and data protection
Exact D4 software and data protection records, with unknowns preserved.
| Factory operating system | ZettOS[1][4][8] Wiki and Download Center document current ZettOS apps for the Standard Series (D4/D6). Exact shipping build still varies by unit and update; Neowin tested 1.5.x-alpha on D4. |
|---|---|
| RAID support | Yes[1] The exact-model official table publishes RAID: JBOD/Basic/RAID 0/1/5/6/10. This confirms the listed storage modes independently of the exact installed ZettOS build number. |
| Backup through the graphical interface | Yes — Sync & Backup app documents creating backup tasks in the GUI[7][3] Requires at least one storage pool. Not a tested restore drill. |
| Backup to an independent target | Yes — destinations include external device, Google Drive, OneDrive, Dropbox, SMB, WebDAV, FTP, and Rsync[7] Documented destination types; cloud/remote speed and account binding are separate limits. |
| Documented restore path | Not confirmed as a named restore-from-backup wizard in opened wiki articles[7] Backup tasks keep a copy; Sync & Backup status/logs were opened; no step-by-step restore article was found in navigation. |
| Scheduled backup | Yes — wiki documents scheduled automatic backup versus manual[7][27] Migration of personal space pauses tasks; manually restart afterward. |
| Restore from snapshots | Unknown for storage-pool snapshots[6] Wiki documents VM snapshot import/export as a nav title but the article 404'd. Storage FAQ does not describe Btrfs snapshot rollback. Jamie Balfour (D6 owner) reported no easy snapshot workflow. |
| Version retention | Unknown[7] No opened official article named versioning/retention for file history. |
| Immutable protection | Unknown[7] No opened official article named immutable/WORM shares. |
| Remote snapshot replication | Not documented as snapshots; sync/backup to another Zettlab NAS or file service is documented[7] Do not equate file sync with snapshot replication. |
| Native endpoint restore | Unknown as a bare-metal/client image restore product[14] Phone photo backup is one-way phone→NAS. Time Machine backup folder is mentioned under File Services. |
| Official system update path | Yes — Settings-Update check, download, Update Now; Download Center hosts Standard Series images[8][4] Dialog warns of ~10–20 minutes, automatic restart, interrupted tasks. Neowin described messy alpha upgrades on D4. |
| System status interface | Yes — Device Info, Resource Monitor (CPU/RAM/network/disks/fan), LCD status[12][3] LCD content described by PCMag (IP, CPU/RAM, capacity, time, drive indicators) on D4. |
| System log interface | Partial — Sync & Backup Log center (filter/export CSV); support log upload/download exists in nav[11] Not shown as a full OS-wide syslog UI in the opened articles. |
Maximize Performance with Premium Hardware.
Exact D4 maximize performance with premium hardware. records, with unknowns preserved.
| Product Model | Zettlab D4[1] Exact-model table 1, row 2. |
|---|---|
| SATA Drive Bays | 4-Bay[1] Exact-model table 1, row 3. |
| Maximum Storage | 100TB (24TB*4+4TB*1)[1] Exact-model table 1, row 4. |
| LAN Ports | 1GbE*1 2.5GbE*1[1] Exact-model table 1, row 5. |
| Processor | RK3588 8 Cores with 6TOPS NPU[1] Exact-model table 1, row 6. |
| RAM | 16GB LPDDR4x[1] Exact-model table 1, row 7. |
| Maximum RAM | 16GB[1] Exact-model table 1, row 8. |
| System Drive Capacity | eMMC 32GB[1] Exact-model table 1, row 9. |
| M.2 SSD Drive Slots | 1[1] Exact-model table 1, row 10. |
| USB | 1*USB3 Gen1(Type C) 1*USB3 Gen1(Type A) 2*USB2.0[1] Exact-model table 1, row 11. |
| SD Card Reader | 1*SD4.0 1*TF4.0[1] Exact-model table 1, row 12. |
| PCIe Expansion | -[1] Exact-model table 1, row 13. |
| RAID | JBOD/Basic/RAID 0/1/5/6/10[1] Exact-model table 1, row 14. |
| Codecs | H.264 8/10bit H.265 8/10bit[1] Exact-model table 1, row 15. |
| LCD Display | 3.49-Inch[1] Exact-model table 1, row 16. |
| Ambient Lighting | ✓[1] Exact-model table 1, row 17. |
| UPS Support | ✓[1] Exact-model table 1, row 18. |
| Docker Support | ✓[1] Exact-model table 1, row 19. |
| Operating System | ZettOS[1] Exact-model table 1, row 20. |
| AI Features | AI Categories AI Search AI Q&A (via PC Computing Power) AI Transcription[1] Exact-model table 1, row 21. |
Warranty and support
Exact D4 warranty and support records, with unknowns preserved.
| Standard warranty | 2 years on the NAS main unit; 1 year on included power adapter and cables[5][1] Official stores/authorized resellers. Third-party drives/RAM not covered. Data loss excluded; back up before RMA. |
|---|
Physical, power and acoustics
Exact D4 physical, power and acoustics records, with unknowns preserved.
| Dimensions | Not published in the official Compare Model table[1] D4: reviewer figures are appended separately and conflict across outlets; not substituted as factory ratings. |
|---|---|
| Weight | Not published in the official Compare Model table[1] Reviewer empty-chassis figures are appended where available. |
| Power supply and consumption | External adapter included; wattage/typical draw not on opened official table[1][9] Package includes region-specific adapter. No official idle/load watts found. |
| Acoustic conditions | No official dBA/bels rating found[1] Qualitative reviewer comments only; Jamie Balfour 14dB cell was a 'coming soon' placeholder with idle watts shown as 0 and is not adopted. |
Ports, filesystem and installation notes added this round
Official HDMI/Btrfs/install rules plus reviewer physical measurements that the factory table still omits.
| HDMI output | 4K (official table); marketing states 4K 60Hz to a TV[2][13][1] Wiki documents HDMI wired playback from the mobile app. Hardware decode ≠ a given Plex transcode count. |
|---|---|
| Internal storage-pool filesystem | Btrfs[6] Wiki FAQ for Settings-Storage. Creating a pool formats selected drives. |
| Drive installation / hot-swap | Official install guide: shut down and disconnect power before installing drives[9] Tool-free trays are not the same as powered hot-swap. PC-WELT and Neowin also reported no hot-swap. |
| Retail barcode (Shopify variant) | 6978168270006[17] First-party variant JSON for NAS-D4 / variant 46941849845981. |
| Reviewer exterior size (not factory table) | PCMag: 7.2 × 8.2 × 9.2 in (H×W×D). PC-WELT publishes a conflicting 133 × 152 × 215 mm; do not use that figure for installation planning.[19][20] Do not treat either figure as an official datasheet row. |
| Reviewer empty weight (not factory table) | PC-WELT: about 2.3 kg empty; about 4.7–5.3 kg with four 3.5-inch drives[20] Single-outlet measurement, not a factory rating. |
AI, security and backup operating conditions
Model-specific compute and current documented workflows.
| AI Q&A compute location | PC computing power in the exact D4/D6 official model table[1] Do not equate local data/search with an independently verified NAS-hosted LLM. |
|---|---|
| Two-factor authentication and SSH | Current wiki documents OTP 2FA and administrator-verified SSH with automatic closure[26] Historical alpha-review omissions are version-specific. No penetration testing performed. |
| Backup interruption during personal-space migration | Backup and sync pause and must be manually restarted after migration[27] |
| Remote access account and relay conditions | Zettlab Remote Access requires a bound cloud account; phone Remote-ID relay has a speed cap[28][29] Standard Bridge is not link aggregation. |
Exact product identity & open questions
- Product ID
- zettlab-d4[1]
- Exact MPN or manufacturer configuration ID
- NAS-D4[1]
- Model
- D4[1]
- Factory compute and memory
- Rockchip RK3588 · 8-core + 6-TOPS NPU; 16GB LPDDR4X[1]
- Storage layout
- 4 × SATA HDD + M.2 NVMe SSD[1]
- Documented restore-from-backup wizard: Backup task creation is documented; a named restore procedure was not in opened wiki navigation.
- Storage-pool snapshots / immutable shares: Btrfs is confirmed; snapshot rollback and WORM were not documented. VM snapshot article 404'd.
- Host ECC: Still unknown for the factory LPDDR4X path.
- Official dimensions, weight, PSU watts, dBA: Factory Compare Model table omits them. Reviewer sizes conflict.
- US third-party PDPs: Newegg 0 items; Walmart mismatch; Amazon/B&H/Best Buy not live-qualified. Only factory PDP verified.
- Video ASR/frames: Zander Round rWG4UACuq_w D4 video: description/chapters read; YouTube ASR URL returned empty; no frames. Willie Howe page is a stub.
- Neowin full HTML: Direct 403; conclusions use search extraction of the original URL, not a saved full page.
- AI Q&A execution-location conflict: Model-specific official table specifies PC compute; generic marketing and some original reviews imply on-NAS LLM execution. Standalone NAS inference is not independently verified.
Sources
Research updated Sep 11, 2026. Individual source check dates are listed below. Measurements belong to the named reviewers; tested configurations and software versions may differ from the product you buy.
- [1] Zettlab D4/D6 official product page ↗
Checked Sep 11, 2026 · Compare Model HTML table; HDMI 4K marketing; 24-month warranty line; US 3–5 day delivery; Add to cart
- [2] Zettlab D4/D6 marketing/spec page ↗
Checked Sep 11, 2026 · Spec table HDMI 4K row; After-Sales Service 2-Year Warranty
- [3] ZettOS feature page ↗
Checked Sep 11, 2026 · Backup/sync, RAID, Docker, VM caveat for D4/D6, Resource Monitor, Cocard
- [4] Zettlab Download Center ↗
Checked Sep 11, 2026 · Apps + ZettOS images for Standard Series D4/D6 vs Ultra
- [5] Zettlab Limited Warranty Policy ↗
Checked Sep 11, 2026 · NAS main unit two years; adapter/cables one year; data not covered
- [6] ZettOS wiki: Manage Storage Pools and Drives ↗
Checked Sep 11, 2026 · FAQ: internal pools use Btrfs; JBOD expansion documented; RAID 0 expansion explicitly unsupported; other RAID expansion unresolved; SSD cache >32GB; SMR not in this article but compatibility list
- [7] ZettOS wiki: Create A Backup Task ↗
Checked Sep 11, 2026 · Backup to this NAS / others; scheduled automatic backup; destinations include external, cloud, SMB, WebDAV, FTP, Rsync
- [8] ZettOS wiki: Update System ↗
Checked Sep 11, 2026 · Settings-Update check/download/Update Now; 10–20 min restart warning
- [9] ZettOS wiki: Install Drives ↗
Checked Sep 11, 2026 · Shut down and disconnect power before installing drives; M.2 under bottom cover
- [10] Zettlab Hardware Fit & Usage Reference ↗
Checked Sep 11, 2026 · D4/D6 HDD/SATA and M.2 2280 lists; SMR not recommended; D4/D6 do not support PWDIS
- [11] ZettOS wiki: Log center ↗
Checked Sep 11, 2026 · Sync/backup/connection logs; CSV export
- [12] ZettOS wiki: Device Info and Resource Monitor (zettos page) ↗
Checked Sep 11, 2026 · Device Info SN/Model/Hardware/Network/Status; zettos Resource Monitor
- [13] ZettOS wiki: Wired HDMI playback ↗
Checked Sep 11, 2026 · HDMI cable to TV/monitor; phone Cast → Wired Playback
- [14] ZettOS wiki: File Services ↗
Checked Sep 11, 2026 · SMB, FTP/FTPS, WebDAV, NFS, Rsync, DLNA, Bonjour, Time Machine backup folder
- [15] Official D4 column in Compare Model table ↗
Checked Sep 11, 2026 · HTML Compare Model table D4 column (bays, LAN, CPU, RAM, M.2, RAID, USB, SD)
- [16] Download Center Standard Series ↗
Checked Sep 11, 2026 · Standard Series For D4/D6 vs Ultra Series
- [17] Shopify variant JSON NAS-D4 ↗
Checked Sep 11, 2026 · variants[id=46941849845981] sku NAS-D4 barcode 6978168270006 price 42999 available true
- [18] Notebookcheck D4 hands-on ↗
Checked Sep 11, 2026 · Verdict, specifications, software, Transparency gift-sample
- [19] PCMag D4 review (UK edition body opened) ↗
Checked Sep 11, 2026 · Performance Testing 289/298 MBps; Design 7.2×8.2×9.2 in; RAID 5 26.9TB
- [20] PC-WELT ZETTLAB D4 Test ↗
Checked Sep 11, 2026 · Gigabit 115–121 MB/s; 2.5GbE ~275 MB/s; weight 2.3 kg
- [21] Neowin D4 alpha review ↗
Checked Sep 11, 2026 · Search extraction of original URL; 403 on direct curl
- [22] Oscillog D4 review ↗
Checked Sep 11, 2026 · Japanese setup, COPY, RAID wizard
- [23] Zettlab variant JSON NAS-D4 live ↗
Checked Sep 11, 2026 · price 42999 cents; available true; sku NAS-D4
- [24] Zettlab selected D4 PDP ↗
Checked Sep 11, 2026 · Add to cart; Sale $429.99; US 3–5 day delivery claim; 24-month warranty line
- [25] Zettlab historical D4 PDP observation ↗
Checked Sep 2, 2026 · Retained historical $429.99; not refreshed
- [26] ZettOS wiki: Security and two-factor authentication ↗
Checked Sep 11, 2026 · Full available written instructions; parent checked saved material, original capture timestamp retained.
- [27] ZettOS wiki: Backup preparation and personal-space migration ↗
Checked Sep 11, 2026 · Full available written instructions; parent checked saved material, original capture timestamp retained.
- [28] ZettOS wiki: Network and remote access ↗
Checked Sep 11, 2026 · Full available written instructions; parent checked saved material, original capture timestamp retained.
- [29] ZettOS wiki: Phone photo backup ↗
Checked Sep 11, 2026 · Full available written instructions; parent checked saved material, original capture timestamp retained.
Research and review record
- Research: Grok 4.6 · Source research and data update
- Self-check: Grok 4.6 · Researcher self-check
- Independent review: GPT-6 (Codex) · Independent original written-source and primary-table review; three PC-WELT figures visually inspected. Unread video and other charts excluded.
- Editorial integration: GPT-6 (Codex) · Editorial integration and validation
Independent review completed for the scope recorded in the audit.
Source evidence and review history (JSON)