Hello!
I’m using a TerraMaster F4-212 with 4×1TB HDDs in TRAID, running TOS 6. Recently, I began upgrading the drives one by one to larger capacity disks.
I replaced one 1TB drive with a 6TB drive using the standard procedure via the TOS interface. Everything appeared fine at first — the partitions were created automatically (root, swap, data), and the RAID5 volume (md0) started rebuilding as expected.
However, I noticed something strange:
Although the new disk had the same partition layout as the others, it was not added to the system RAID arrays:
The root partition wasn’t added to /dev/md9
The swap partition wasn’t added to /dev/md8
As a result, the disk was not marked as a “system disk” in the GUI.
I do know how to manually re-add the partitions using mdadm --add and mdadm --grow, and that worked fine. But this behavior seems risky.
What worries me:
If a user replaces all four disks one by one — and TOS doesn’t automatically include the new drives in the system RAID arrays — they could end up with no remaining system disk, which might make the system unbootable, even though the data RAID is perfectly healthy.
I believe this behavior should either be improved or accompanied by a clear warning during the disk replacement process.
Thank you for your efforts and for bringing TOS 6 to ARM devices — it’s greatly appreciated.
Kind regards.
New disk does not become a "system disk" after replacement via TOS [SOLVED]
Re: New disk does not become a "system disk" after replacement via TOS [SOLVED]
We have noticed the issue, so we added system disk management functionality in the X86 architecture's 688 beta version.
However, this feature has not been included in ARM yet. Whether it can be introduced later depends on the product team's evaluation.
However, this feature has not been included in ARM yet. Whether it can be introduced later depends on the product team's evaluation.
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: New disk does not become a "system disk" after replacement via TOS
Hello! We are pleased to announce that the System Disk Management feature is now officially available! Upgrade to TOS 6.0.750 to experience this new functionality, and we welcome your valuable feedback.
Thank you for your continued support of TerraMaster!
For the full TOS 6.0.750 update notes, please visit:
https://forum.terra-master.com/cn/viewtopic.php?t=4985