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[Help]F2-425 Plus: OS location, system reset, and system disk questions

Posted: 12 Jan 2026, 21:48
by kapithan
hi

I bought a F2-425 Plus and one HDD (I added it to my forum signature).
Now I have only one HDD installed.

I am using the NAS for the second day. Everything is great so far.
I installed Jellyfin, added music and movies, and I am testing settings, remote access to Jellyfin, etc.

During this, I got a few questions:

1. I just realized that the operating system is installed on the HDD.
If I want to replace the HDD, or if the HDD fails, will I need to initialize the system again?
Do I understand this correctly?

Or is the operating system stored somewhere inside the NAS (for example, on internal memory)?

I am asking because when I change some system settings (for example DNS), I can hear the HDD working, like there is disk activity. I thought system settings should not use the HDD.

2. I am thinking about buying an SSD (250–500 GB) to use it as a system disk.
In this case, do I need to follow the guide from this link, right?
viewtopic.php?t=423

3. If I do a system reset, will my data on the HDD be saved?
I mean movies, music, and TV shows.
Or will the HDD be formatted during a full initialization and all data will be deleted?

Thank you.

Re: [Help]F2-425 Plus: OS location, system reset, and system disk questions  [SOLVED]

Posted: 13 Jan 2026, 17:48
by TMzethar
Hi.
The TOS system is installed at the head of the HDD/SSD.

If your only HDD is damaged or removed, the device will lose the system.

If you plan to add a new SSD to host the system, you only need to adjust (add/delete) the system mounting target disk in Control Panel - Disk - System Disk, without needing to reinstall the system.

If your HDD was previously used for TOS system/storage pool, resetting the system generally will not affect your data.(Although you don't have to do this.) However, if it prompts 'Delete/Format', it may be because your HDD was not successfully recognized for some reason. In this case, please stop the operation to prevent data loss.