Hi, I have also this problem with the same R710 and I uptated Bios, Perc, Idrac and stil have this error.
PERC firmware version 6.3.3-0002 too
I have 6 HDD 3.5 Disks of 2TB and RAID 5
Im trying to install Proxmox in ext4 all auto (wizard) without custom options and installation say me all ok...