Lenovo ThinkSystem DM240N Service Manual page 7

Assign each drive: storage disk assign -disk disk_name -owner owner_name
b.
You can enter the command on either controller module.
You can use the wildcard character to assign more than one drive at once.
Reenable drive ownership automatic assignment if needed: storage disk option modify -node
c.
node_name -autoassign on
You must reenable drive ownership automatic assignment on both controller modules.
.
Chapter 1 Hot-swapping a drive
3