Migration to raid 1

I have two disk WD30EFRX (wd red 3TB)

i have tried to migrate from jbod (one disk WD30EFRX) to raid 1 but i think that somethink went wrong.

As you can see - first disk has 2,51 free space

Second disk 2,95

I think that i have choosen wrong option - migration to raid 1.

What should i do to configuration properly raid 1 without data loss?

Sorry for my english.


As a recommendation, run a system restore to see if the capacity is updated on the drives.

Please see page 132 of the user manual