Hi, I have a HP DL360p G8 server with 4x SSDs (one Raid 1 2x480GB for proxmox system and another RAID 1 with 2x2 SAMSUNG 860 PRO SSDs for VMs) . Our VMs are running slow, disk read/write performance is 510/500 mb/s (on Win server 2k19 VM) and the VMs are very lazy, i must wait for loading application like on HDD etc., we have a PERC H400 raid controller and we are using LVM (not zfs), what can I check to find out what the problem is? I think it might be a cache fault in the RAID controller (1gb) what do you guys think? Will removing the controller and moving to ZFS get rid of this problem?