Hello thanks for choosing Dell. What is your server model?

Also what controller are you using?

What does the controller say? All okay?

(If not then you’ll have to move on to the OS level.)

I cant help but its not 1/3... its modulus 2 and in your case the rest(above) of 2TB.   What does pgarted/fdisk see if you one work with a single disk?

Regards,
Joerg