I just got my F4 423 today.
I installed 2x 16tb toshiba HDDs and 1 m.2. nvme samsung 1tb SSD.
What I wanted is to setup two HDDs in Raid1, which i did no issue.
But when i try to figure out and set up that NVMe ssd as the cache, the option is greyed out.

Device sees that drive, so I know its not that problem.
Is it because the drives are right now in proces of 'synchronising' thats taking so long quite long time?
.Or something else I am missing?


