TerraMaster Forum

Hi,
I have an F4-425 Plus running TOS 7. After a reboot it suddenly stopped booting normally and now only shows:

“TNAS Initialization. Please initialize your TNAS by following the prompts.”

The NAS was working normally before this and I do not want to initialize it because my existing volumes and Docker data are still there.

I booted Ubuntu from USB and checked the system:

• Both NVMe SSDs are detected.
• UTOSCORE assembles successfully.
• The TOS boot files are present (vmlinuz, initrd.img, grub.bz2).
• My data volumes mount normally and the data appears intact.
• I updated the BIOS and tried changing the boot order / TOS Boot First setting, with no change.

So it looks like the TOS installation and data are still present, but the NAS is booting into the initialization environment instead.
Is there a way to repair or recover the existing TOS installation without reinitializing the NAS or affecting the existing volumes?

Thanks.

jwlayz wrote: ↑20 Sep 2026, 23:06

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