So,
1) in this situation for example I will select only the first drive:
http://oi65.tinypic.com/dysj07.jpg
2) with pvdisplay -m I'll check the devices name (sda first drive, sdb second drive)
3)
https://ovirt.org/images/uarwo42-gdeploy-3.png?1519899774 and here in device name
engine and vmstore sda, data sdb
correct?