TerraMaster Forum

I recently had a power outage and had to shutoff my NAS by the front button before the UPS died. I've come back to it and it's not showing any folders in the volume. There's nothing under any of the accounts but the volume still shows it is half full. I'm able to access it from the web browser, windows file explorer, and FTP. Nothing showed with each of those methods. Nothing shows in the shared folders section either.

I'm not sure if the power outage had any part in this but I thought I'd mention it. I'm running TOS Version: 5.1.131-00123. I've been meaning to upgrade.

I found this post and tried this but it didn't help. viewtopic.php?t=9808

Here’s the solution:
Step 1: Manually trigger the system to recognize shared folders on Volume 2
1. Log in to your TOS web interface.
2. Go to Control Panel > Shared Folder.
3. Click on the Advanced button (usually located at the top right or bottom of the shared folder list).
4. In the advanced menu, you should see an option like “Restore to Volume 2” or “Recover shared folders for Volume 2”. Select it and confirm.
5. The system will scan Volume 2 and create the necessary entries in its database. Once done, refresh the page or go back to File Manager. Your shared folders from Volume 2 should now appear.

Step 2: If Step 1 doesn't work or the option is unavailable
If the “Restore” option doesn't work, or if Volume 2 doesn't appear in the list, you can use a command via SSH to force a remount and database refresh:
1. Connect to your NAS via SSH.
2. Run the following command:/etc/tos/scripts/mntdata
This script is designed to automatically mount all detected volumes and register their shared folders.
3. After the command completes (it may take a moment), refresh your TOS web interface and check File Manager again.

Regarding the issue you encountered on the F4-423 where the shared folder disappeared from the TOS desktop but the occupied space is normal and visible but inaccessible in Windows, this is usually related to a mount path offset of the shared folder, an abnormal TOS system configuration database, or file system metadata errors due to unexpected power outages.

Based on your subsequent troubleshooting steps, we currently believe that the problem is most likely caused by an abnormal TOS system configuration database after an unexpected power outage.

Since your volume space is shown as half full, it indicates that the data is still safely stored on the disk, so there's no need to worry too much.

Please visit our official website and contact our engineers through the online chat for guidance on how to fix the issue. Additionally, please include the URL of this forum post and your forum nickname so we can quickly identify you.

I reached out to one of your engineers. After a scheduling mistake on their part, we missed the first appointment. We rescheduled for 11pm on Tuesday but no one contacted me. Is there a guide repairing an abnormal TOS system configuration database?

erehwon6811 wrote: ↑01 Apr 2026, 11:47

We apologize that the previous remote technical session did not start successfully. Since your situation requires remote diagnosis by an engineer, please visit our official website again to contact our online customer service so we can schedule a suitable time for you.