I have some 18TB Seagate Disks on a DL380 Gen8 HP server with p420i raid controller, with 2GB cache module. I have created a RAID5 with 16TB disks but with 18TB disks, all disks are recognized but when I want to create a RAID volume, all disks fail. (a pic enclosed)
I did not find any HP document that help me find out what is the max disk size a p420i can support in practice. I know that HP indicated that only 8TB disk is officially supported but I have tested 16TB disks and it works well.
In general, how can I be sure if a raid controller can support a specific disk size in practice? Theoretically, what is the problem with a disk model that causes raid creation failure?