Yes.
Therefore, I am asking if I have already 2 x 4TB disks and one of them will be a disk parity.
Then... an option "Read-Check" doing something else? Is it used for something else?
I only have one 4tb disk and I clicked "check".
This option is used to check the disk for possible errors? or Is it to check the read speed in each sector? Should I use it e.g. once a week / month ?
If it is used for something else, please explain.