Introducing the TerraMaster U4-212 : Realtek based short depth 4-bay rack

Introducing the TerraMaster U4-212: A Powerful New Rackmount NAS for Small Enterprises

TerraMaster, a leading network storage solution provider, has unveiled its latest innovation, the U4-212 Rackmount NAS. This new 4-bay network storage server is specifically designed for small enterprises, offering exceptional performance and a wide array of features at an affordable price.

Miniaturized Rack-mounted Server for Space-Saving

The U4-212 boasts a compact 1U rackmount case with a depth of only 360mm (14.17 inches) and a weight of merely 3.2kgs, making it a space-saving solution. Installation is simple and does not require any rails, making it applicable to most 2-column cabinets and wall-mounted small cabinets. This NAS can be deployed in various environments such as machine rooms, storage rooms, offices, and more.

High Computing Power for Demanding Tasks

Under the hood, the U4-212 is powered by an advanced ARM V8.2 Cortex-A55 64-bit 1.7GHz quad-core processor with a built-in floating-point unit (FPU) and NEON SIMD engine. Accompanied by 2GB of DDR4 RAM and video DSP hardware acceleration, this NAS delivers abundant computing power. It excels at tasks such as document storage, data backup, and even 4K video transcoding, meeting the diverse needs of small businesses.

Upgraded Operating System for Enhanced Performance

The U4-212 runs on the all-new operating system TOS 5, which brings more than 50 new functions and 600 improvements compared to the previous generation. This update not only enhances performance and response speed but also improves security and ease of use, providing users with a seamless experience.

Versatile Storage and Data Protection

With support for up to 22TB of hard drives and a total capacity of 88TB, the U4-212 offers an abundance of data storage space. It can handle 30 million HD photos, 18 million working documents, 40,000 HD movies, and 4 million downloadable music files. Moreover, TerraMaster’s TRAID technology provides flexible disk array management with automatic capacity expansion and redundancy protection, ensuring data integrity and reliability.

Comprehensive Backup Solutions and Ransomware Protection

The U4-212 comes with rich backup solutions, including TerraMaster File System Snapshot (TFSS), Rsync Backup, Duple Backup, Time Machine Backup, CloudSync, and more. The TFSS, based on the BTRFS file system, protects against data loss caused by ransomware attacks, providing users with peace of mind.

Enhanced Multimedia Capabilities

Equipped with powerful 4K video hardware decoding, the U4-212 serves as an excellent home multimedia center. It supports uPnP/DLNA protocol and can stream videos to various multimedia devices like smartphones, tablets, smart TVs, and more. TerraMaster’s dedicated “Multimedia Server” app and third-party multimedia servers like Emby and Plex further enrich the multimedia experience.

Secure Access and IT Management

The U4-212 ensures secure access through a private data access channel provided by VPN servers, offering three modes of VPN services (PPTP, OpenVPN, L2TP/IPsec). Additionally, it can connect to domain servers through AD or LDAP domain, reducing IT management costs and improving staff efficiency.

TerraMaster U4-212 NAS Specification:

Processor ARM V8.2 Cortex-A55 64-bit 1.7GHz Quad Core
Realtek 1619B
CPU Single-Core Score /
Hardware Encryption Engine
Hardware Transcoding Engine /
System Memory 2GB DDR4
Pre-installed Memory module /
Total Memory Slot Number /
Maximum Supported Memory 2 GB
Disk Slot Number 4
Compatible Drive types 3.5″ SATA HDD
2280 M.2 NVMe Slot Number /
Maximum Internal Raw Storage Capacity 44 TB (22 TB x2) (Capacity may vary by RAID types)
Drive Hot Swap
File System
Internal Drive Btrfs, EXT4
External Drive EXT3, EXT4, NTFS, FAT32, HFS+
External Ports
RJ-45 1GbE Network Jack 1
RJ-45 2.5GbE Network Jack /
RJ-45 10GbE Network Jack /
SFP+ 10GbE Network Jack /
USB3.0 Host Port 1
USB2.0 Host Port 1
PCIe Slots /
M.2 2280 NVMe Slot /
Size (HWD) 222 x 119 x 154 mm
Packaging Size (HWD) 258 x 220 x 170 mm
Weight Net Weight: 1.3 Kg Gross Weight: 2.1 Kg
System Fan 80 x 80 x 25mm 1PCS
Fan Mode Smart, High speed, Middle speed, Low speed
Noise Level 23.8 dB(A) (Fully loaded Seagate 4TB ST4000VN008 hard drive(s) in idle state)
Power Supply 40W
Redundancy Power Supply /
AC Input Voltage 100V – 240V AC
Current Frequency 50/60 Hz, Single frequency
Power Consumption 20.1W(Fully loaded Seagate 4TB ST4000VN008 hard drive(s) in read/write state)
10.4 W (Fully loaded Seagate 4TB ST4000VN008 hard drive(s) in hibernation)
Limited warranty 2 years
Certificate FCC, CE, CCC, KC
Environment RoHS, WEEE
Working Temperature 0°C ~ 40°C (32°F ~ 104°F)
Storage Temperature -20°C ~ 60°C (-5°F ~ 140°F)
Relative Humidity 5% ~ 95% RH
Package Contents
Host unit (x1)
Power cord (x1)
Power Adapter(x1)
RJ-45 network cable (x1)
Quick Installation Guide (x1)
Limited Warranty Note(x1)
Screws(a few)
TOS Features
OS Supported
Supported Client OS Windows OS, Mac OS, Linux OS
Supported Web Browsers Google Chrome 97.0.xxxx, Mozilla Firefox 9.3, Apple Safari 12.1; Microsoft Edge 99.0.xx or later version.
Supported mobile OS iOS 12.0, Android 10.0 or later version
Storage Management
Supported RAID Types TRAID, Single, JBOD, RAID 0, RAID 1
Maximum Internal Volume Number 64
Maximum iSCSI Target 32
Maximum iSCSI LUN 32
Volume Expansion with Larger HDDs TRAID, RAID 1
Volume Expansion by Adding a HDD /
RAID Migration
SSD Cache
Hot Spare /
Hard Drive S.M.A.R.T.
Seagate IHM
NVRAM write cache(BBU-protected) /
Shared Folder Snapshot
LUN Snapshot /
File Services
Maximum Concurrent SMB/AFP/FTP/SFTP Connections 100
Windows Access Control List (ACL) Integration
NFS Kerberos Authentication
Account & Shared Folder
Maximum local user’s account number 128
Maximum local group number 128
Maximum shared folders number 128
Maximum shared folders syncing tasks 2
Rsync Backup
Duple Backup
Centralized Backup /
USB Backup
Cloud Sync
Time Machine Backup
File System Snapshot
TFM Backup
Link Aggregation /
DLNA Compliance
VPN Client
VPN Server
Proxy Client
Proxy Server /
UPnP/Bonjour Discovery Remote Access
Access Right Management
Batch users creation /
Import/Export users
User Quota Managerment
Local user access control for CIFS/SAMBA and FTP
Domain Authentication
AD Domain
LDAP Client
LDAP Server /
Firewall Protection
Account Auto-block Protection
AES Volume and Shared Folder Encryption
Importable SSL certificate
Instant Alert via email, Desktop Notification, Beep
RSA 2048 Encryption(TOS 5.0)
PAM (Pluggable Authentication Modules)
OTP Authentication(TOS 5.0)
HyperLock File System(TOS 5.0)
Power Management
Power Resume
Scheduled Power On/Off
Wake up On LAN(WOL)
UPS Supported
Multi-window, Multi-task System Management
Custom Desktop
Control Panel
Resource Monitor
OS UI Language English, German, French, Spanish, Italian, Magyar, Chinese, Japanese, Korean, Turkish, Portuguese, Russian
Application Center
iSCSI Target
Terra Photos /
Duple Backup
Centralized Backup /
USB Backup
VPN Server
Aria 2
Terra Search /
Deduplication /
Web Server
Clam Antivirus /
Multi Media Server
Plex Media Server
Docker Manager

Pricing and Availability:

The TerraMaster U4-212 4-Bay NAS Server is now available for purchase at a competitive price of £459.99. With its advanced features and reliable performance, the U4-212 is an ideal choice for small enterprises seeking a powerful and secure network storage solution.

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