I have a MyCloud EX4100 with 4 disks, 4 TB each.
I want to change from RAID 0 to RAID 5.
But when doing so, I always get an error code 635, telling me that one of the disks has crashed.
The disk are brand new though and I always get “Good” for each of them.
Why can’t I install RAID 5?
You could refer to the following link: https://support-en.wd.com/app/answers/detail/a_id/25488