
Terramaster T9-500 Pro
Score: 87/100Terramaster U4-500
Score: 46/100Rankings

A 9-bay desktop NAS powered by an Intel i7-1255U, dual 10 GbE, and up to 216 TB raw capacity, targeting creative professionals and SMBs needing high throughput and flexible RAID.
A 1U 4-bay rackmount NAS with an Intel i3 CPU, dual 10 GbE, and up to 96 TB raw capacity, aimed at SMBs needing fast backup and media streaming.
| Attribute | ![]() | Terramaster U4-500 |
|---|---|---|
216 TBbest | 96 TB | |
9best | 4 | |
10 Gbpsbest | 10 Gbpsbest | |
10best | 6 | |
16 GBbest | 8 GB | |
| ↓ lower better | — | 34.5 dBbest |
2 yearsbest | 2 yearsbest | |
| ↓ lower better | — | 6.2 kgbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | Terramaster U4-500 |
|---|---|---|
Performance(3) | ||
CPU Model | Intel i7-1255U | Intel i3-1215U |
CPU Cores | 10 | 6 |
System Memory (GB) | 16 GB | 8 GB |
Storage & Capacity(4) | ||
Maximum Raw Capacity (TB) | 216 TB | 96 TB |
Drive Bays | 9 | 4 |
RAID Support | RAID 0, 1, 5, 6, 10, TRAID, TRAID+ | RAID 0, 1, 5, 6, 10, JBOD, Single, TRAID, TRAID+ |
Supported Drive Types | SATA | SATA III, NVMe PCIe 4.0 x4 (caching) |

Products in the top-left offer the best value (high score, low price).

Professional reviewers commend the T9-500 Pro for its high-end Intel i7 processor, dual 10 GbE ports, and metal chassis, noting enterprise-level performance, while pointing out the diskless nature and less mature TOS 6 UI.
Everyday users rave about blazing transfer speeds over 10 GbE and easy RAID configuration, but note fan noise, a learning curve with TOS, and the need to buy drives separately.
Professional reviewers consider the U4-500 a performance leader in the SMB NAS segment, lauding its dual 10 GbE ports, DDR5 memory, and TOS 6 feature set, while noting limitations such as lack of PCIe expansion and modest base RAM.
Everyday users highlight easy setup, fast backup and streaming, but complain about fan noise, a learning curve for RAID/caching, and occasional software glitches.