For my reference later.
wget http://downloads.hpe.com/pub/softlib2/software1/pubsw-linux/p1257348637/v76502/hpacucli-9.20-9.0.x86_64.rpm
yum install -y --nogpgcheck hpacucli-9.20-9.0.x86_64.rpm
hpacucli controller slot=0 physicaldrive all show
Different use cases: Ceph is better with more hosts (at least 6 or 7 minimum) while XOSTOR is better between 3 to 7/8.
We might have better Ceph support in the future for large clusters.