That's good to know! Is there a possibility to reflash it, in case it gets corrupted (or overwritten by third-party operating systems)?Gremlin wrote: ↑24 Jun 2026, 14:31 -425 models do not use the traditional plug-in usb flash drive. They use a daughter-board flash card mounted on the motherboard (USB-DOM).Code: Select all
What it Does in Your F4-425The Hardware: It is a tiny, proprietary daughter board attached to an internal USB header via a standoff and secured with a single screw. The Function: It contains a small amount of flash memory (historically 1GB–4GB, but updated to a compact ~250MB Flashdisc in the 425-series). Its sole purpose is to store the lightweight initboot / bootloader for TerraMaster's TOS operating system.
How to Flash a New USB Initboot for TOS on Windows PC?
Re: How to Flash a New USB Initboot for TOS on Windows PC?
F4-425 PLUS on TOS 7.0.0517 Beta (X86)
Re: How to Flash a New USB Initboot for TOS on Windows PC?
Standard mainboard USB plug (varieties available on-line) - Picture here:
viewtopic.php?p=55280&hilit=usb+dom#p55280
F5-221 TOS7.0.0777 - 4x4TB (Ironwolf) Traid
F2-424 TOS7.0.0777 - 2x500GB nvme (P3) Traid, 2x6TB HDD (HGST) Traid
F2-221 TOS7.0.0777 - 1x3TB Ext4, 1x4TB Btrfs
F2-425+ TOS7.0.0777 - 2x500GB nvme (P3) Traid, 2x6TB HDD (EXOS) Traid
F2-424 TOS7.0.0777 - 2x500GB nvme (P3) Traid, 2x6TB HDD (HGST) Traid
F2-221 TOS7.0.0777 - 1x3TB Ext4, 1x4TB Btrfs
F2-425+ TOS7.0.0777 - 2x500GB nvme (P3) Traid, 2x6TB HDD (EXOS) Traid
Re: How to Flash a New USB Initboot for TOS on Windows PC?
Great! This should be much more reliable. Is there an image avaliable to download, if this module was overwritten?Gremlin wrote: ↑24 Jun 2026, 16:41Standard mainboard USB plug (varieties available on-line) - Picture here:
viewtopic.php?p=55280&hilit=usb+dom#p55280
F4-425 PLUS on TOS 7.0.0517 Beta (X86)
Re: How to Flash a New USB Initboot for TOS on Windows PC?
You may download image from the link: https://download3.terra-master.com/TOS% ... ot_1.3.img
To contact our team, please send email to following addresses, remember to replace (at) with @
Technical team: support(at)terra-master.com(for technical support)
Service team: service(at)terra-master.com(for purchasing, return, replacement, RMA service)
Technical team: support(at)terra-master.com(for technical support)
Service team: service(at)terra-master.com(for purchasing, return, replacement, RMA service)
Re: How to Flash a New USB Initboot for TOS on Windows PC?
That posted file link appears to be the same file as linked in the original post in this thread - ie Tos 6 UEFI 150MB
I don't know if that will use Tos7 as a default, given that on-line update from 6 -> 7 is not yet available. Maybe a Tos7 version will be made available in due course.
F5-221 TOS7.0.0777 - 4x4TB (Ironwolf) Traid
F2-424 TOS7.0.0777 - 2x500GB nvme (P3) Traid, 2x6TB HDD (HGST) Traid
F2-221 TOS7.0.0777 - 1x3TB Ext4, 1x4TB Btrfs
F2-425+ TOS7.0.0777 - 2x500GB nvme (P3) Traid, 2x6TB HDD (EXOS) Traid
F2-424 TOS7.0.0777 - 2x500GB nvme (P3) Traid, 2x6TB HDD (HGST) Traid
F2-221 TOS7.0.0777 - 1x3TB Ext4, 1x4TB Btrfs
F2-425+ TOS7.0.0777 - 2x500GB nvme (P3) Traid, 2x6TB HDD (EXOS) Traid
Re: How to Flash a New USB Initboot for TOS on Windows PC?
Hello, Is there a new initboot image for TOS7 yet?


