TerraMaster u4-423

TerraMaster U4‑423 — a compact 1U rackmount 4‑bay NAS (network‑attached storage) with an Intel Celeron quad‑core CPU, dual 2.5 GbE networking, and support for up to ~88 TB of drives — built for small/medium business file storage, backups and multimedia applications

TerraMaster U4-423 NAS — 4‑Bay Rackmount NAS Overview

🔧 Key Specifications

• CPU: Intel® Celeron® N5095 quad‑core 2.0 GHz (up to 2.9 GHz) x86 processor with hardware encryption and 4K video transcoding support.

• Memory: 4 GB DDR4 RAM (1×4 GB), expandable up to 32 GB (2 DIMM slots).

• Drive Bays: 4 × SATA (supports 3.5″ & 2.5″ HDD/SSD).

• Max Raw Capacity: Up to ~88 TB (with 22 TB drives ×4), depending on sizes.

• RAID: Supports RAID 0/1/5/6/10 plus online expansion and migration.

• Network: Dual 2.5 GbE LAN — can be aggregated for up to ~5 Gbps combined throughput.

• NVMe Slot: Built‑in M.2 NVMe SSD slot for SSD cache acceleration.

• Ports: 2× 2.5GbE, 2× USB 3.1 (10 Gbps), 1× HDMI 2.0 for direct output.

• File Systems: Btrfs/EXT4 internally; external drive support for EXT3/EXT4/NTFS/FAT32/HFS+.

• Form Factor: 1U rackmount with a shallow depth (~360 mm) — fits many cabinets.

• Weight: ~6.8 kg.

Performance & Features

• High throughput for small business environments and heavier workloads thanks to 2.5 GbE links and link aggregation.

• Supports multiple RAID levels for redundancy and performance.

• SSD caching (NVMe) helps boost performance under heavy file operations.

• Rich backup options include snapshot, cloud sync, centralized backup, and more.

• Quiet and compact design with intelligent cooling.

Use Cases

• Centralized file storage for teams.

• Media server/streaming (4K transcoding supported).

• Backup server for PCs, servers, and cloud sync.

• Virtual services like FTP, web, databases, and mail hosting.

Pros

• Excellent hardware for the price segment with a full Intel CPU and expandable RAM.

• Gigabit plus networking (2.5 GbE) enables faster transfers than typical 1 Gb NAS units.

• Flexible RAID and cache options.

⚠️ Considerations

• Software (TOS) can feel less polished compared to Synology/QNAP for some users. User experiences online note occasional bugs or OS limitations — worth researching before purchase.

• RAID syncing and performance depend heavily on disks and network setup.