Thanks Shawn for the explanation.
Since all disks are in a Raid 10 and I "lost" 1/3 of the HDDs, I was assuming that this can be easily rebuilt/resynced..?
I could think of clearing the metadata on all the "lost" disks so they become available again and can be set to global spare so the disk groups can be rebuilt from scratch.
But I know that then the rebuild will mix up my pre-defined disk order, means that it will not keep the desired order as I did it on creation, resulting in mixing the disks for Controller A and B. More an optical/clear view thing than an performance issue, I know.
This is how it was setup: https://imgur.com/a/cwRxvhs
first 5 disks belong to Controller A, disk group 2
second 5 disks belong to Controller B disk group 2
last 6 disks belong to Controller A, disk group 3
This is how it will look like when I clear all metadata and the system has done a auto-rebuild: https://imgur.com/a/cvkowQU
This also happens to the two small SSD groups which I didnt colour in the pictures....
How can I get it in the original state so it looks like 3 blocks?
Thanks