[ovirt-users] Choosing optimal vdo Write policy on LSI Raid device that always report write-trough to the OS

Hi, I am evaluating vdo for an hyperconverged ovirt cluster. The volume is on RAID device supported by a LSI (Dell Perc H710) controller with Write Back cache enabled : Current Cache Policy: WriteBack, ReadAdaptive, Cached, Write Cache OK However these LSI controllers (all PERC series on Dell servers), as per documentation, always report cache policy as writethrough to the OS, no matter if write back is effectively enabled or not : cat /sys/block/sdb/device/scsi_disk/0\:2\:1\:0/cache_type write through vdo by default choose its write policy (sync or async) accoring to the cache mode reported by the disk. So with cache policy auto, in that case it is set to "sync" : write policy: sync So my question : In this configuration, write cache enabled on the raid controller but reported as write trhough to the os, should I manually set vdo cache policy to async for optimal performance? Thanks for your help