TRAID capacity not matching up with actual drives

[DigitalAnalog]

Hi, I'm running the latest TOS 5 on an F4-423. I just added a new 16TB to my current 8TBx2, 16TBx1 TRAID configuration with a single parity drive.

I was expecting to see a usable space of around 29TB but TOS is showing the final capacity will only be 21.81TB. What gives?

TOS Storage Pool settings page screenshot:

Screenshot 2024-06-28 002219.png

[DigitalAnalog]

No response from TM staff?

[TMpzhen]

You can refer to this link https://www.terra-master.com/global/terramaster-traid/

[DigitalAnalog]

I'm sorry - which part of this answers my question?

[Gremlin]

Marketing Bumph.

[TMzethar]

Generally, the disk you add to TRAID go through more than one step, and the capacity increases in stages. Maybe after waiting for the synchronization to complete, you'll end up with 32TB of capacity.

[DigitalAnalog]

Generally, the disk you add to TRAID go through more than one step, and the capacity increases in stages. Maybe after waiting for the synchronization to complete, you'll end up with 32TB of capacity.

No, the synchronization finished after 2 days and I was left with 21TB - the same amount you would get if you had 4x8TB disks.

I had to delete the storage pool and re-build to get the correct 29TB of usable space.

Now I have to restore all my data from backups. Oh well.

I'm really not looking forward to when I need to upgrade one of my drives and it's anyone's guess what the final usable space will be. :/

[TMzethar]

We can arrange our engineers to remotely troubleshoot your problem, if you haven't rebuilt it yet.
If you need remote troubleshooting service, please contact the customer service window on the official website or the technical support e-mail (please provide them with the link in this post).

[DigitalAnalog]

Thanks. I've already rebuilt, but please relay this issue to your engineers if possible.