TerraMaster Forum

Check Control Panel > Storage Managment > Disk. One will be labeled system disk. If the system disk is the NVME drive then you should be able to delete the volume or storage pool associated to the HDD raid. I am unsure if it will allow removal during a initialization/rebuild/verification so you may need to wait until that process is completed. Once the volume/pool has been removed, you will then be able to create a new pool and add all the disks you want there after without needing to reinstall the OS. There is a factory reset option but I suspect the OS will just pick up the existing disk configuration and go into verification mode once the OS is booted.

Task: Remove the existing pool for the HDD's. This will then allow you to create a storage pool to include all drives.

thank's for all,
I deleted the volume, then the storage pool, finally installed TOS on one NVMe, and 12 disks were being rebuilt for a new volume. It took less than 40 hours to rebuild everything, whereas adding to the created TRAID from disk to disk took even longer !