TerraMaster Forum

Hi everyone,

I’m looking for help with my TerraMaster F5-422 after upgrading from TOS 5 to TOS 6

Hardware

* Model: TerraMaster F5-422
* Current TOS Version: 6.0.794
* BIOS/initBoot Version: MAPL0301V06
* Two network interfaces:
* 1GbE
* 10GbE

What happened

I upgraded the NAS from TOS 5 to TOS 6.0.794. The upgrade completed successfully, and the system reports no further updates.
However, after rebooting, the NAS connected to network I configured my both my port and gave a static IP for 10GbE and shifted my data around.

Then I turned it off, then when I turned it on it became inaccessible on network, after multiple restart it managed to connect again and now it's not connecting at all.

Current problem

* The NAS is not accessible over either the 1GbE or 10GbE network ports.
* TerraMaster NAS Assistant cannot discover the NAS despite same witch, router and network.
* I cannot access the web interface using the previous IP address.
* I cannot ping the previous IP address.
* The LAN cables are connected and the link LEDs appear normal.
* The NAS powers on normally and appears to boot without any obvious errors.

Additional information

* Before the upgrade, both network ports worked correctly.
* The storage pool and data have not been intentionally modified.
* The update screen before losing access showed:
* TOS 6.0.794
* BIOS/initBoot MAPL0301V06
* No available updates


My primary concern is restoring network access without risking the existing RAID array and data.

Any advice would be greatly appreciated.

Thank you.

It may be possible that the default IP address has been activated after the update. I don't remember what the default ip address is but I would try that. 10.0.0.1, 192.168.0.1, or add "1" in the zero spaces. AI indicates 192.168.0.100.

You can also look at your router logs to see what IP it is acquiring and then use that to "remote in".

Cheers,

wanderwithsky wrote: ↑15 Jul 2026, 14:01

To help pinpoint the issue, please confirm:

• Bonding: Did you create a bond on the network interface when configuring the static IP?

• Port LED: When the Ethernet cable is connected, is the LED steady or blinking rapidly (indicating activity)?

Then try these steps: power off the NAS, disconnect the 10GbE cable, connect only the 1GbE port (Port 1) to your router/switch, and power the unit back on to see if it becomes accessible.