After creating a RAID array, or to find an existing array that may or may not be mounted, use commands like:
mdadm --detail /dev/md0
You’ll see the individual RAID disk /dev/sd*, which can be further examined like:
mdadm --examine /dev/sda1 /dev/sdb1
Sometimes the operating system (such as CentOS Stream) may change the names of the RAID device, it might be under /dev/md/. To mount the RAID, use commands like:
mkdir /mnt/raid mount /dev/md0 /mnt/raid
There might be extra devices under /dev/md that can’t be mounted, but one of them should be the desired RAID.