The Broadcom LOM or cards  will write straight through as well.   Per Intel, all I/O devices are supported.  Regards,
Intel says that DDIO is enabled by default but I just want to know if it is supported in R320 G12. If I buy R320 with E5-2420 and X540DP will I get direct cache IO with Intel DDIO using W2008R2 ? Any other information on the subject will be appreciated too.
Intel DDIO. R320 - is it enabled?