Dell C1100 – Partitioning for RAID 10

In the Rocky Linux installer, choose custom partitioning.  First, create a /boot mount point that is 2GiB in size.  Set device type to RAID and RAID Level to RAID1.  Next, create / as an LVM partition on a RAID 10 pool.  Lastly, create the SWAP area as an LVM partition on the RAID 10 pool.  That's all you need to do. 

Grub will be synced across the four drives.  Thus, if one drive fails, the other drives can still boot Rocky Linux so that the RAID array can be rebuilt.