disk perfomances fio

Hello everyone, We are experiencing ProxMox 5.4-3 on a Dell PowerEdge R620 before rolling it out on a multi host cluster. Globally, the experience is good except about disk performances. The R620 is running 3 x 2Tb Hynix SSDs on a PERC H710 (configured in RAID5 : Element Size 64Kb, No Read...