Have OMV 5.3.2 installed as a VM in Proxmox. 4 SAS drives are passed through (with scsiblock=1).
Running 'sdparm -g WCE /dev/sdb' shows that Write Cache is disabled.
Go into the WebUI and enable Write Cache for the same drive (save and apply), sdparm still shows it disabled.
So I used 'sdparm -s WCE --save /dev/sdb', then check what sdparm shows and yes it reports that it is enabled. WebUI shows it's disabled.
Should OMV work with SAS drives and Write Cache through the WebUI?