| Revew | TerraMaster U4-500 4-Bay Rackmount NASThe TerraMaster U4-500 is a 1U rackmount NAS and backup server with four bays for 3.5-inch or 2.5-inch drives. It is built on an Intel Core i3-1215U with 6 cores and 8 threads (up to 4.4GHz) and 8GB of DDR5 memory expandable to 64GB, and suits small and medium businesses. Two 10GbE ports with link aggregation and SMB Multichannel allow sequential writes of up to 2090MB/s, and two M.2 NVMe PCIe 4.0 slots serve as an SSD cache. The system runs TOS 6 and includes the TerraMaster Business Backup Suite (BBS). 
Key features- Core i3 and DDR5 - Intel Core i3-1215U with 6 cores and 8 threads up to 4.4GHz, AES-NI encryption acceleration and Intel UHD Graphics. 8GB DDR5 installed, two SODIMM slots, up to 64GB.
- Dual 10GbE - Two 10GbE RJ-45 ports with link aggregation and SMB Multichannel for up to 20Gbps of bandwidth and sequential writes of up to 2090MB/s.
- 4 bays and 2 M.2 slots - Four hot-swap bays for up to 96TB raw (4 x 24TB), plus two M.2 NVMe PCIe 4.0 x4 slots for SSD caching (Hyper Cache).
- TRAID and RAID - Support for RAID 0/1/5/6/10, JBOD and Single, as well as TerraMaster TRAID and TRAID+ for capacity expansion without downtime.
- TOS 6 and BBS backup - The SPC security module, AES-256 encryption and a firewall, plus the BBS suite with Centralized Backup, TerraSync, Duple Backup, CloudSync and Snapshot to build a 3-2-1 backup strategy.
- Short-depth 1U chassis - Only 14.1 inches deep, tool-less and rail-free installation, three 40 mm fans and a noise level of 34.5dB(A).
Specifications| Manufacturer | TerraMaster | | Model | U4-500 | | Form factor | 1U rackmount NAS, 4 bays | | Processor | Intel Core i3-1215U, 6 cores, 8 threads, up to 4.4GHz | | Memory | 8GB DDR5 non-ECC SODIMM, 2 slots, up to 64GB | | Drive bays | 4 x SATA for 3.5" and 2.5" drives (HDD/SSD), hot-swap | | Max raw capacity | 96TB (4 x 24TB) | | M.2 | 2 x NVMe PCIe 4.0 x4 | | Network | 2 x RJ-45 10GbE, link aggregation | | USB | 3 x USB-A 10Gbps, 1 x USB-C 10Gbps | | Video | HDMI 2.0, H.264/H.265 hardware transcoding up to 4K 60fps | | RAID | TRAID, TRAID+, Single, JBOD, RAID 0/1/5/6/10 | | Operating system | TOS 6 | | Protocols | SMB, AFP, NFS, FTP, SFTP, WebDAV | | Cooling and noise | 3 x 40 x 40 mm fans, 34.5dB(A) | | Power supply | 120W, AC 100-240V | | Power consumption | 40.2W full load, 18.9W hibernation | | Dimensions (H x W x D) | 45 x 440 x 381 mm | | Weight | 4.1 kg | | Operating temperature | 0 to 40°C |
In the box- TerraMaster U4-500 NAS
- Power cord
- RJ-45 network cable
- Quick installation guide
- Screws
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