I have DSS v5 connected to ESX 4 (vSphere) and I have those settings applied to my environment.

I seem to get errors only when I enable Write-Back Caching on the individual LUNs on each target.

I get some nasty errors in the VMKernel logs that point to storage going OFFLINE and ONLINE and a bunch of 'abort task' commands are issued.

I wonder what the deal is with the WB Cache and VMWare. Maybe they just don't like eachother.