TerraMaster Official Forum

The 421 is a TNAS series specially designed for home and small business customers. This series of TNAS adopts Intel Celeron J3455 quad-core CPU and 4GB memory. This series of products has been on the market for more than 4 years, it has a high performance/price ratio and is widely used by customers in applications such as file servers, multimedia servers, video transcoding, Docker, virtual machines, and it has been a very popular TNAS series for a long time.

Now, the 421 series is end of life, and replaced by the brand new 423 series! The 423 series includes:

A 2-bay Tower TNAS F2-423
A 4-bay Tower TNAS F4-423
A 6-bay Tower TNAS T6-423 (coming soon...)
A 9-bay Tower TNAS T9-423
A 12-bay Tower TNAS T12-423
A 4-bay Rackmount TNAS U4-423
A 8-bay Rackmount TNAS U8-423

The 423 series uses a more powerful new generation intel Celeron N5105/N5095 quad-core CPU, also equipped with 4GB memory. The obvious difference between the 423 series and the previous generation is that the 423 series has M.2 NVMe slots for SSD cache acceleration, and the 2 Gigabit Ethernet ports are changed to 2 2.5G Ethernet ports to provide faster storage speed. The overall performance of the new 423 series has been significantly improved for more use cases.

The 423 series is now officially released, welcome to know more about the all-new 423 series TNAS.

Does that mean no more TOS updates for 421 owners?

End of life doesn't mean end of support. 421 series will be supported at least in two years.

I'm shopping right now - this is a WILD environment for it

As they’re both x86 CPUs, no it shouldn’t mean that the 421 will not get TOS updates, it just means that new CPU intensive features will make it slower than the 4223.